ASP.NET MVC Core Web POST 请求使用 NULL 值填充数据模型 [英] ASP.NET MVC Core Web POST Request populating Data Model with NULL values
本文介绍了ASP.NET MVC Core Web POST 请求使用 NULL 值填充数据模型的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
场景
我正在建立一个博客并正在配置一个页面以将编辑过的评论发布到 MsSql 服务器.
问题
提交表单POST后，通过我的视图，应该通过这个表单捕获和返回的属性值都返回为NULL"！?由于我的数据模型中存在 NULL 值，这最终会导致异常错误.在逐步完成我的整个应用程序并使用 Fiddler 后，我无法诊断问题.
快速可视化示例
<块引用>在提交 POST 之后(在运行时)并且我的应用程序到达了我博客的主控制器，这就是显示和可用的内容.
注意:如您所见，主控制器在运行时捕获每个输入的值.但是，此数据不会传输到 EditComment 方法 post POST.
过程
输入控件填充了我的模型的属性值，然后提交:
<块引用>EditComments.cs
@model MpComment... HTML 内容 ...<form asp-controller="Home" asp-action="EditComment" method="post" class="text-danger input-form"><div asp-validation-summary="ModelOnly"></div><div class="form-group"><label asp-for="<Model.Property>"class="控制标签"></label><input asp-for="<Model.Property>"class="form-control"/><span asp-validation-for="<Model.Property>"class="text-danger"></span>... ASP 表单输入元素...<div class="form-group input-submit"><input type="submit" value="Submit" class="btn material-button"/>
</表单>
我的 AppDbContext 已初始化
<块引用>AppDbContext.cs
命名空间 Portfolio.Data{公共类 AppDbContext : IdentityDbContext{公共 AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }公共虚拟 DbSetMpPost { 得到;放;}公共虚拟 DbSetMpComment { 得到;放;}公共虚拟 DbSetMpGuest { 得到;放;}公共虚拟 DbSetMpLogin { 得到;放;}公共虚拟 DbSet<MpProject>MpProject { 得到;放;}}} 我的 MpComments 模型开始出现移动并设置每个属性值，但是，填充每个属性的数据为 NULL.
使用系统；使用 System.ComponentModel.DataAnnotations;命名空间 Portfolio.Models{公共部分类 MpComment{公共 int Id { 获取；放;}公共 int Mp_Post_Id { 获取；放;}公共 int Mp_Guest_Id { 获取；放;}公共字符串注释 { 获取；放;}公众号?业力{得到;放;}公众号?批准{得到;放;}公共字符串 Ip { 获取；放;}公共字符串代理{获取；放;}公共日期时间?创建 { 获取;放;} = DateTime.Now;公共日期时间?更新{得到;放;} = DateTime.Now;}}一旦没有任何东西被填充，家庭控制器就会被启动，并调用以下函数:
<块引用>HomeController.cs
[HttpPost]公共异步任务EditComment(MpComment 评论){评论.Id = 0;_repo.AddComment(comment);如果(等待 _repo.SaveChangesAsync())return RedirectToAction("ViewComments");别的返回视图(评论)；} 此时从 POST 填充的 comment 参数变量仅包含 NULL 值，如下所示:
调查&分析
视觉工作室
- 本地变量检查器
代理 null批准为空评论为空创建 {6/30/2019 1:04:29 PM}编号 0空号业力空Mp_Guest_Id 0Mp_Post_Id 0更新 {6/30/2019 下午 1:04:29}此过程在其他设置为完成完全相同功能的过程中按预期工作，只是在不同的表上！?
例如，以下是 Fiddler 在成功的 POST 中捕获的内容，来自几乎相同的 POST 过程:
提琴手检查员
- Raw (EditProject 成功)
POST https://localhost:44390/Home/EditProject/21 HTTP/1.1主机:本地主机:44390连接:保持连接内容长度:555缓存控制:max-age=0来源:https://localhost:44390升级不安全请求:1内容类型:应用程序/x-www-form-urlencoded用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，像 Gecko)Chrome/75.0.3770.100 Safari/537.36接受:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3引用者:https://localhost:44390/Home/EditProject/21接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMp2YqORrHzf5IL0rLJ8jvAP-RYvHIXeH63EfD3-TugdZGBP9nf_lHhAn71ACsIQZe_cJ1x7u3FBh25uhlXZIJX9yk7ZdH_GuwfYEe-Zaa1CSAD2f2g8U7syt8jvxy18c-qCN9Yq2zLQpBeOlzftudcaMKKrsA-UGO8BOHLPTk1TYe1QMosDGaFDLXY0POqCpluxiiA0qsA0i9iQeAP6HL7ZC8lLjf76Lf_E5usVyakwa9X3ELDJQeaEFFa5Vi_5063xCHhm3NRREE5loUCff1rKmaOKvvOR-FNF-QtYLG-MGthgVAGah4cdXjD0jsKFBM0Ny-Yt8uRddQ26w_8AUJqhRo9jOAXEuzyhYwPRfKQKykgpy-4lVIZXc2QR25EWxq9H6zh5GGCTIitxISDcpoHf0mUqzT9aJKo_LwB6cibzbDwBmVsTc6Yn6cQA0MMoBVa6E6hKuvQoNerU7psX5z2D2k8tB8mZVlJQ3medeMwHQonOSBh99OxOrBO5K6iedlpPqSNco8r7PbNcHCdhLKehtoyJkE3tzmrv_EOTAS7ldXNhhPHqNp_RmuAdGWlsJ-A-bN5itj1hv_o7RCxl8t49XB9oddsg4iOvR-BUZOLuxJKfQ90PAH4S9BvblwLKoXx3Gt3We5WeG8Ga6rAXHQhdId=0&Title=Product+Engineer&Desc=nulla+neque+libero+convallis+eget+eleifend&Live_Url=bloglovin.com%2Feget%2Ftincidunt%2Feget.jpg&Github_Repo=sourceforge.net%2Fet%2Fultrices%2Fpos2Fcubilia.jpg&安培; Bitbucket_Repo = creativecommons.org％2Fpede％2Flibero％2Fquis.html&安培;创建= 2011-07-11T00％3A00％3A00.000&安培;更新= 2019-06-20T00％3A00％3A00.000&安培; __ RequestVerificationToken = CfDJ8OfA6sTjcU1PuqxxzGM-oMqTHmlRblU70EY0Ou7tH2IifiXdJOCtMRepfMg-GhKz-j4at6h9BOzJTNjHIROMjDpUiOqxvDeGWcja8K-uGkYrW8DX58j9mIFlwKML9tLVtvusmGmPekVMPxYqRkKdcyLGb6qpav3upDLAvfxLblbs9RynCyG4bDTAAZ4jzxc-WW提琴手检查员
- 原始(编辑评论失败)
POST https://localhost:44390/Home/EditComment/1 HTTP/1.1主机:本地主机:44390连接:保持连接内容长度:606缓存控制:max-age=0来源:https://localhost:44390升级不安全请求:1内容类型:应用程序/x-www-form-urlencoded用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，像 Gecko)Chrome/75.0.3770.100 Safari/537.36接受:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3引用者:https://localhost:44390/Home/EditComment/1接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMp2YqORrHzf5IL0rLJ8jvAP-RYvHIXeH63EfD3-TugdZGBP9nf_lHhAn71ACsIQZe_cJ1x7u3FBh25uhlXZIJX9yk7ZdH_GuwfYEe-Zaa1CSAD2f2g8U7syt8jvxy18c-qCN9Yq2zLQpBeOlzftudcaMKKrsA-UGO8BOHLPTk1TYe1QMosDGaFDLXY0POqCpluxiiA0qsA0i9iQeAP6HL7ZC8lLjf76Lf_E5usVyakwa9X3ELDJQeaEFFa5Vi_5063xCHhm3NRREE5loUCff1rKmaOKvvOR-FNF-QtYLG-MGthgVAGah4cdXjD0jsKFBM0Ny-Yt8uRddQ26w_8AUJqhRo9jOAXEuzyhYwPRfKQKykgpy-4lVIZXc2QR25EWxq9H6zh5GGCTIitxISDcpoHf0mUqzT9aJKo_LwB6cibzbDwBmVsTc6Yn6cQA0MMoBVa6E6hKuvQoNerU7psX5z2D2k8tB8mZVlJQ3medeMwHQonOSBh99OxOrBO5K6iedlpPqSNco8r7PbNcHCdhLKehtoyJkE3tzmrv_EOTAS7ldXNhhPHqNp_RmuAdGWlsJ-A-bN5itj1hv_o7RCxl8t49XB9oddsg4iOvR-BUZOLuxJKfQ90PAH4S9BvblwLKoXx3Gt3We5WeG8Ga6rAXHQhdMp_Post_Id=1&Mp_Guest_Id=1&Comment=lorem+quisque+ut+erat+curabitur+gravida+nisi+at+nibh+in+hac+habitasse+platea+dictumst+aliquam&Karma=1&Approved=1&Ip=21.99.31.96&Agent=Mozilla%2F5.0+%28Macintosh%3B+U%3B+Intel+Mac+OS+X+10_7%3B+en-us%29+AppleWebKit%2F533.4+%28KHTML%2C+like+Gecko%29+Version%2F4.1+Safari%2F533.4&Create=2018-07-17T00%3A00%3A00.000&Update=2012-06-01T00%3A00%3A00.000%3A00.000%3A00.000&__FDJuTuVerification&__FDJuTuVerification&__FDJ8Request-oMquggjJDBhMvQwfCKwHRJS9tJeBi-4bT19jJVjuUjZgYE1LD4BvCF2LBJlQ45u3d9sEGmm-l9EAhbXaA2TwuNjW4xhYpVXl4Z0YE_YBEvbuSzod3SKWY3Kydkvjvjvjvjvjvjvjvjvjvjvjvjvjvjpg注意:除了与 POST URL 存在差异外，所有内容看起来都相同(应该在哪里).每次我解决这个问题时，我都会取第一个条目，编辑它，然后提交.每次我这样做时(在其他四个工作正常的过程中)，它会迭代到下一个条目；如上所示.
示例:A) 编辑 &当有 20 个项目条目时提交项目 1:
POST https://localhost:44390/Home/EditProject/21 <=== 差异B) 编辑 &当有 20 个评论条目时提交评论 1:
POST https://localhost:44390/Home/EditComment/1 <=== 差异Chrome(网络标头)
<块引用>成功(项目)
一般:请求网址:https://localhost:44390/Home/EditProject/66请求方式:POST状态码:302远程地址:[::1]:44390推荐人政策:降级时不推荐人---------------------------------------------------------------------------------------------------响应头:内容长度:0日期:2019 年 7 月 1 日星期一 00:04:16 GMT位置:/首页/查看项目服务器:红隼状态:302x 支持:ASP.NETx-源文件:=?UTF-8?B?QzpcV29ya3NwYWNlXHd3d1xhc3BcUG9ydGZvbGlvXFBvcnRmb2xpb1xIb21lXEVkaXRQcm9qZWN0XDY2?=---------------------------------------------------------------------------------------------------请求头::authority: 本地主机:44390:方法: POST:path:/Home/EditProject/66:方案:https接受: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8缓存控制:max-age=0内容长度:1200内容类型:应用程序/x-www-form-urlencoded饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMpTJYFjUyUy3eLO3fbnX9V4SSq14P_h_AlTAyZs-9LrMW9QOzTP46d8CJetHqzamw-ulm6IbjGyC_hElFiwtJRbKAV3GuVlGQeNfbhcJ7M81EH4bqnbi-NBwP4nmlXROTG3DvMYdHqC1-eqT53ip4mnHpdLDLKlwX80Lk8uWPpiyD5L_RFiMGl5i0vOUz19bbn-mSC3IVbuGz8LeDePfKDmU-3b8_sNiZJpBpx4p6jORrds69LkpkdZX2NUWzyevM4TWw8irVRRBY0PAFKkkZEfQy52kPFfHLZgcZ2JMFo2iQ0DqRcq7nqwnU1JRbNTHEQ56WOsStWn7IGfBqA43B5QdLn-yWTiP5AIalG3kv_o-6VZTmyfu6QbBCbwD_7gpjewoB8IiYn86WaTVbvkryGBJZMjSEq5M2H1m365zI392lNZVzwDADwF04s4zYmHx8snkk9Z3NUAjvzDJo9b1IJNNIKnPmERysOR73W_hAfZdpVN0Ltx2fT7-13g4ow-2Xizi_t2b4SQcX6tC_tlju224eh0KkKNxOJ3irBQRsWAT9iKe_aaE7usFUkZgfR9vuZnPO62qzuxUwROsX3-Tz4lSxSD2N4ajqpEpVMcS528hMO5lXQwMA2RpGBKpR2JJzsN1KdbYgPcB16Ad14VgJNJ来源:https://localhost:44390引用:https://localhost:44390/Home/EditProject/66升级不安全请求:1用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，如 Gecko)Chrome/75.0.3770.100 Safari/537.36---------------------------------------------------------------------------------------------------表格数据:职位:产品工程师描述: nulla neque libero convallis eget eleifend内容: sodales scelerisque mauris sat amet eros suspendisse accumsan tortor quis turpis sed ante vivamus tortor duis mattis egestas metus aeneanFTertor donec ut mauris eget massa tempor convallis nulla neque libero convallis luc eget eleulnistium vivamus tortor duis mattis egestasipsum primis in faucibus orci luctus et ultrices posuere cubilia curae nulla dapibus dolor vel est donec odio justo sollicitudin ut suscipit a feugiat et eros prestibulum ac est lacinia nisi venenatis tristique fusce diProject_Image:http://dummyimage.com/193x141.jpg/ff4444/ffffffLive_Url:bloglovin.com/eget/tincidunt/eget.jpgGithub_Repo: sourceforge.net/et/ultrices/posuere/cubilia.jpgBitbucket_Repo: creativecommons.org/pede/libero/quis.html创建:2011-07-11T00:00:00.000更新:2019-06-20T00:00:00.000__RequestVerificationToken:CfDJ8OfA6sTjcU1PuqxxzGM-oMq4kGmbGOLj875J5O8hQlwLIYQR7YHYe58lgzEyN5Wat3viIjRuF80IPiwf_iRYUydAC0vfWv-q5jvLA_bAsdz7blAbvNoT4TxTYqZ5ONf5Q2bYqOyWlhdoN7ZduEaRc3dEBua_8F35F6mNuq0NFfLTDkvlCvO1da4dbhsWg49nsg---------------------------------------------------------------------------------------------------<块引用>
失败(评论)
一般:请求网址:https://localhost:44390/Home/EditComment/20请求方式:POST状态码:500远程地址:[::1]:44390推荐人政策:降级时不推荐人---------------------------------------------------------------------------------------------------响应头:内容类型:文本/html；字符集=utf-8日期:2019 年 6 月 30 日星期日 23:40:23 GMT服务器:红隼状态:500x 支持:ASP.NETx-源文件:=?UTF-8?B?QzpcV29ya3NwYWNlXHd3d1xhc3BcUG9ydGZvbGlvXFBvcnRmb2xpb1xIb21lXEVkaXRDb21tZW50XDIw?=---------------------------------------------------------------------------------------------------请求头::authority: 本地主机:44390:方法: POST:path:/Home/EditComment/20:方案:https接受: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8缓存控制:max-age=0内容长度:558内容类型:应用程序/x-www-form-urlencoded饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMpTJYFjUyUy3eLO3fbnX9V4SSq14P_h_AlTAyZs-9LrMW9QOzTP46d8CJetHqzamw-ulm6IbjGyC_hElFiwtJRbKAV3GuVlGQeNfbhcJ7M81EH4bqnbi-NBwP4nmlXROTG3DvMYdHqC1-eqT53ip4mnHpdLDLKlwX80Lk8uWPpiyD5L_RFiMGl5i0vOUz19bbn-mSC3IVbuGz8LeDePfKDmU-3b8_sNiZJpBpx4p6jORrds69LkpkdZX2NUWzyevM4TWw8irVRRBY0PAFKkkZEfQy52kPFfHLZgcZ2JMFo2iQ0DqRcq7nqwnU1JRbNTHEQ56WOsStWn7IGfBqA43B5QdLn-yWTiP5AIalG3kv_o-6VZTmyfu6QbBCbwD_7gpjewoB8IiYn86WaTVbvkryGBJZMjSEq5M2H1m365zI392lNZVzwDADwF04s4zYmHx8snkk9Z3NUAjvzDJo9b1IJNNIKnPmERysOR73W_hAfZdpVN0Ltx2fT7-13g4ow-2Xizi_t2b4SQcX6tC_tlju224eh0KkKNxOJ3irBQRsWAT9iKe_aaE7usFUkZgfR9vuZnPO62qzuxUwROsX3-Tz4lSxSD2N4ajqpEpVMcS528hMO5lXQwMA2RpGBKpR2JJzsN1KdbYgPcB16Ad14VgJNJ来源:https://localhost:44390引用:https://localhost:44390/Home/EditComment/20升级不安全请求:1用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，如 Gecko)Chrome/75.0.3770.100 Safari/537.36---------------------------------------------------------------------------------------------------表格数据:Mp_Post_Id:20Mp_Guest_Id:20评论: etiam faucibus cursus urna uttellus nulla ut id mauris vulputate elementum nullam varius nulla业力:6批准:0ip: 142.146.130.50代理:Mozilla/5.0 (Windows NT 5.1；rv:14.0) Gecko/20120405 Firefox/14.0a1创建:2010-10-21T00:00:00.000更新:2009-10-07T00:00:00.000__RequestVerificationToken:CfDJ8OfA6sTjcU1PuqxxzGM-oMpEiWlpyDJHiDaw7Rz0PI6fyiscJ9aAahlk0J2Coz5R42uB-L3LvBS94t5QxvcBZ2PwMUI9McLlFR1rtds9yh89UZSzHpR-q_SvbM1g4KCUYDhvNht_bMaoy9NJvMTfOCR_TPW4CKTMnJCR8OEJYahY9CWXY_GozMl1MMkL3MFkFQ---------------------------------------------------------------------------------------------------Wireshark(流量分析)
<块引用>成功(编辑项目)
POST/Home/EditProject/2 HTTP/1.1缓存控制:max-age=0连接:保持活动内容类型:应用程序/x-www-form-urlencoded接受:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMqPm6KX-2uhTXr62WeE6Jia-lF8RtuWQCtjegxTJyf6k-wmUcVdvsBAhEuLKWMN_ttD6dPUr-E8QGJPI_2fD0vYnbo6ADWRXWlMFHwloQ43bPBuSn0zPyp6rZvQLaYFXQXO2aO9Kk7UF64Nh4-kJenvCOcPYtv5JS5HneYXgXO_hM26wnG-3my6SaA4ApdBYndK4DbrdB4393HtLK1579yg7ON12bDIBH71pTMdK6UuIvAI1Bh3HbkUuCOtJzZ3ZqB_JQAutgRe6z6nFGcdPMcb0VbIUPa9USyg0oUJ9KxNPspX9y_dAt4GO18OrsFd-S8D-oWV7zDEMpQVBpLoaVk23xpiObUlVLfS-OQhfVgq3RAXAfkZOR7B7eusFkr3I_ZQRb__76x8dVRvHDy-gy_2ZU1xNJve0v-L38kRsVKoXpjCfc9HW9CaVZvoOH6YB1x-gwsGB_eJ8IJsMTnscrNhDloNlel42K7q8GlA-lTK9yXgiXqLm2VAYdpCf_b45ixMba0Cr7umLyMBzf7BEo3J5uNEAYvF7qN5DOlTSbuvwP33ZbBQJyu3uwnfi4JdzYHNDtlZJqlgUkVgmw_3snp3oJxizU50DFgTUyPjAuB71aEOEyVQRXbgZbJ_S-TzLddHc-hjZarUqKK6n5MBX-8_1主机:本地主机:44390引用者:https://localhost:44390/Home/EditProject/2用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，像 Gecko)Chrome/75.0.3770.100 Safari/537.36来源:https://localhost:44390升级不安全请求:1MS-ASPNETCORE-TOKEN:2a6aebc6-e154-4f02-9517-cae788a1069fX-Forwarded-For: [::1]:60639X-Forwarded-Proto:https内容长度:710Title=Senior+Quality+Engineer+IV&Desc=nascetur+ridiculus+mus+vivamus+vestibulum+sagittis+sapien+cum+sociis&Content=vivamus+tortor+duis+mattis+egestas+metus+aenean+fermentum+donec+ut+mauris+eget&Project_Image=http%3A%2F%2Fdummyimage.com%2F237x180.bmp%2F5fa2dd%2Fffffff&Live_Url=ihg.com%2Fgravida%2Fnisi%2Fat%2Fnibh.json_Religial%2Fnibh.json_Religial.2Fsuspendisse.xml&安培; Bitbucket_Repo = harvard.edu％2Fcongue.aspx&安培;创建= 2018-09-07T00％3A00％3A00.000&安培;更新= 2013-05-17T00％3A00％3A00.000&安培; __ RequestVerificationToken = CfDJ8OfA6sTjcU1PuqxxzGM-oMqFkSNAgkReKvXjTW0EStR_OB4Zz6j90ZdieDNspaE86824rUys1Av2cI9mKtO15RaMnYSiz1_As63Ez0XWxX4N3zfL4vlgGfPQ43FMqqfcPBAG33xvi4G0naOTHEVTdGbiwkLrK2UVF2O01JzfVW3olYbxna45Pg10haFTI-s5QgHTTP/1.1 302 发现日期:2019 年 7 月 1 日星期一 16:19:16 GMT服务器:红隼内容长度:0当前位置:/首页/查看项目<块引用>
失败(编辑评论)
POST/Home/EditComment/1 HTTP/1.1缓存控制:max-age=0连接:保持活动内容类型:应用程序/x-www-form-urlencoded接受:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3接受编码:gzip、deflate、br接受语言:en-US,en;q=0.9,mt;q=0.8饼干:.AspNetCore.Antiforgery.x5eNnYCJ5UA = CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0;.AspNetCore.Identity.Application = CfDJ8OfA6sTjcU1PuqxxzGM-oMqsILl7uDq3qp0MgEGexCwq_b2cNi4376Wt5jxWgINpwDxVRedde5wkOvqycIGfKrQJM2uCVgFMc75i-3Ch_Sct3wFtj_o2wHjLt9OSgM1dieKWdY8BVsLWGHIsMkceMbh_GQz6xJsKrOixjijHUw88p990DPKm2dGJo-JLSHJpqxGNkQxlhPNPf-VsHEQmh27Mn2ah_NZj0NqIlxDuxfmeLQoV0W1s99zVg7URMUbSmGQsShrT1HxhcUjesLuGnyy90GdxmFyGf2-RKPl1zGdkQhaIgicmxQi-bR8otlu5E1uHPms-_HR3xZwT3koowKFYNM4NFHfPuQOwPgZooHCJeaYvweHuqiB5Oh98c6gRHalMSUqGApIICOfVY7mrr9uxt70PeB60PisyAfASCClKf0IsnJLh8flRZ5lr7cr4fhVXU9Jn-PS_09-iX262WvSgjWiPvfe6W_3QxhnPV1NBb0xVy7FCBNMeIIge0BftQzGMb0h_2xsCITwf9oAApXH-uTnC4E2FZI1nUzdfRVPCrj0kXsppeVr6q-65d9_cWgh2aDC4EYeCF4v__Yz9IZPoMKCvHF_rq_Vna4jLPLsobt4VcViYrSY66JmtO9IeoXpA3Ivd2P7ws4lcnJ9STgFV4oP3hmC4aRdA1BURRzz2主机:本地主机:44390引用者:https://localhost:44390/Home/EditComment/1用户代理:Mozilla/5.0(Windows NT 10.0；Win64；x64)AppleWebKit/537.36(KHTML，像 Gecko)Chrome/75.0.3770.100 Safari/537.36来源:https://localhost:44390升级不安全请求:1MS-ASPNETCORE-TOKEN:2a6aebc6-e154-4f02-9517-cae788a1069fX-Forwarded-For: [::1]:61219X-Forwarded-Proto:https内容长度:606Mp_Post_Id=1&Mp_Guest_Id=1&Comment=lorem+quisque+ut+erat+curabitur+gravida+nisi+at+nibh+in+hac+habitasse+platea+dictumst+aliquam&Karma=1&Approved=1&Ip=21.99.31.96&Agent=Mozilla%2F5.0+%28Macintosh%3B+U%3B+Intel+Mac+OS+X+10_7%3B+en-us%29+AppleWebKit%2F533.4+%28KHTML%2C+like+Gecko%29+Version%2F4.1+Safari%2F533.4&Create=2018-07-17T00%3A00%3A00.000&Update=2012-06-01T00%3A00%3A00.000%3A00.000%3A00.000&__FDJuTuVerification&__FDJuTuVerification&__FDJ8Request-oMr9nzkkEn5p6n7jwRflZ1bmxhEOVzWiW7VXO1rmDYbHQR4CvYlmqH4LyuHMPDsQZWXE-gZ3eDU2LWqJd1uVnMKeJcbV0gne1gxSQdeg2Cd7wklVGIJAlC4PNr5hbqJmAGItiemNRukLVKMLVZ0E65dR-pVhxKy4SteMmvnDVMg5_QHTTP/1.1 500内部服务器错误日期:2019 年 7 月 1 日星期一 17:06:52 GMT内容类型:文本/html；字符集=utf-8服务器:红隼传输编码:分块附加信息
项目配置
<块引用>myProject.csproj
<属性组><TargetFramework>netcoreapp2.1</TargetFramework></PropertyGroup><项目组><PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.2"/><PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.1.2" PrivateAssets="All"/><PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" 版本="2.1.9"/><PackageReference Include="MySql.data" Version="8.0.16"/><PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.16"/></项目组><项目组><Folder Include="Migrations"/></项目组></项目> 数据库
<块引用>[mpComment.sql]
创建表 [mpComment]([id] INT NOT NULL 主键，[mp_post_id] INT NOT NULL 外键引用 mpPost(id),[mp_guest_id] INT NOT NULL 外键引用 mpGuest(id),[评论] NVARCHAR(500) NOT NULL,[业力] INT NULL，[已批准] INT NOT NULL，[ip] NVARCHAR(100) NULL,[代理] NVARCHAR(255) NULL,[创建] 日期时间 NULL，[更新] 日期时间 NULL，)插入查询
<块引用>CommentsInsertQuery.sql
这将完全与(通常)通过上述表单提交的数据相同；效果很好.
INSERT INTO [profileDb].[dbo].[mpComment] ([mp_post_id], [mp_guest_id], [comment], [karma], [approved],[ip]、[代理]、[创建]、[更新])VALUES (1, 1, 'lorem quisque uterat curabitur gravida nisi at nibh in hachachabitasseplatea dictumst aliquam', 1, 1, '21.99.31.96', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10)-us) AppleWebKit/533.4 (KHTML, like Gecko) Version/4.1 Safari/533.4', '07/17/2018', '06/01/2012');最后的想法
我担心这个问题可能发生在实体框架内的某个地方，我无法排除故障.如果我有一个真诚的起点，我可以在其中确定 .Net 框架捕获来自浏览器的数据的确切点，我可能能够更好地确定关键问题.
类似帖子:
<块引用>ASP.NET CORE Web API:使用空 Guid 执行 HTTP Post 请求时模型值为空
<块引用>这个问题与另一个问题非常相似，但是，故障排除似乎较少，关于此事的信息也少得多.另外，对这个问题没有太多热爱，也没有给出解决方案.
提前致谢，加油
解决方案
Jerry Rigged Solution
我设法解决了问题，尽管我仍然不确定为什么"会发生此错误.
概要
感知应用程序中正在捕获回发数据(Graphic)，但是，它没有填充 EditComments 方法的参数值，我只是手动填充数据.
解决方案
在我的家庭控制器中包含了 Microsoft.AspNetCore.Http 库，并修改了以下回传 method 来自:
HomeController.cs
[HttpPost]公共异步任务EditComment(MpComment 评论){评论.Id = 0;_repo.AddComment(comment);如果(等待 _repo.SaveChangesAsync())return RedirectToAction("ViewComments");别的返回视图(评论)；} 到
<块引用>HomeController.cs
[HttpPost]公共异步任务编辑评论(){var form = Request.Form.ToList();var 注释 = 新的 MpComment{id = 0,Mp_Post_Id = Int32.Parse(form.Where(x => x.Key == "Mp_Post_Id").FirstOrDefault().Value),Mp_Guest_Id = Int32.Parse(form.Where(x => x.Key == "Mp_Guest_Id").FirstOrDefault().Value),Comment = form.Where(x => x.Key == "Comment").FirstOrDefault().Value,Karma = Int32.Parse(form.Where(x => x.Key == "Karma").FirstOrDefault().Value),Approved = Int32.Parse(form.Where(x => x.Key == "Approved").FirstOrDefault().Value),Ip = form.Where(x => x.Key == "Ip").FirstOrDefault().Value,Agent = form.Where(x => x.Key == "Agent").FirstOrDefault().Value,创建 = Convert.ToDateTime(form.Where(x => x.Key == "Create").FirstOrDefault().Value),更新 = Convert.ToDateTime(form.Where(x => x.Key == "Update").FirstOrDefault().Value)};_repo.AddComment(comment);如果(等待 _repo.SaveChangesAsync())return RedirectToAction("ViewComments");别的返回视图(评论)；} ...一切都按预期进行.
附加说明
这些值很容易检索，以防其他人遇到类似问题.只需将请求表单数据转换为 List(如上所述)并通过输出控制台打印这些结果.
示例:
[HttpPost]公共方法ExpectingPostback(){var form = Request.Form.ToList();foreach(表单中的变量项目){Debug.WriteLine($"{item.Key} : {item.Value}");}}Scenario
I'm setting up a blog and am configuring a page to POST edited comments to an MsSql server.
Issue
After I submit submit a form POST, via my view, the property values that are supposed to be captured and returned via this form, are all returned as "NULL"!? This eventually causes an exception error due to there being NULL values present within my data model. After stepping through my entire application, and using Fiddler, I am unable to diagnose the issue.
Quick Visual Example
After a
POSThas been submitted (during run-time) and my application has reached the Home Controller of my blog, this is what's shown and available.
Note: as you can see, each input's value is captured by the Home Controller during run-time. However, this data is not transferred to the EditComment method post POST.
Process
Input controls are populated with property values for my model, then submitted:
EditComments.cs
@model MpComment
... HTML Content ...
<form asp-controller="Home" asp-action="EditComment" method="post" class="text-danger input-form">
<div asp-validation-summary="ModelOnly"></div>
<div class="form-group">
<label asp-for="<Model.Property>" class="control-label"></label>
<input asp-for="<Model.Property>" class="form-control" />
<span asp-validation-for="<Model.Property>" class="text-danger"></span>
</div>
... ASP Form Input Elements...
<div class="form-group input-submit">
<input type="submit" value="Submit" class="btn material-button" />
</div>
</form>
My AppDbContext is initialized
AppDbContext.cs
namespace Portfolio.Data
{
public class AppDbContext : IdentityDbContext
{
public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
public virtual DbSet<MpPost> MpPost { get; set; }
public virtual DbSet<MpComment> MpComment { get; set; }
public virtual DbSet<MpGuest> MpGuest { get; set; }
public virtual DbSet<MpLogin> MpLogin { get; set; }
public virtual DbSet<MpProject> MpProject { get; set; }
}
}
My MpComments model begins to appear to move through and set each properties value, however, the data that populates each property is NULL.
using System;
using System.ComponentModel.DataAnnotations;
namespace Portfolio.Models
{
public partial class MpComment
{
public int Id { get; set; }
public int Mp_Post_Id { get; set; }
public int Mp_Guest_Id { get; set; }
public string Comment { get; set; }
public int? Karma { get; set; }
public int? Approved { get; set; }
public string Ip { get; set; }
public string Agent { get; set; }
public DateTime? Create { get; set; } = DateTime.Now;
public DateTime? Update { get; set; } = DateTime.Now;
}
}
Once nothing gets populated, the Home Controller is initiated, and the following function is called:
HomeController.cs
[HttpPost]
public async Task<IActionResult> EditComment(MpComment comment)
{
comment.Id = 0;
_repo.AddComment(comment);
if (await _repo.SaveChangesAsync())
return RedirectToAction("ViewComments");
else
return View(comment);
}
It's at this point where the comment parameter variable populated from the POST contains only NULL values, and appears like so:
Investigation & Analysis
VisualStudio
- Local Variable Inspector
Agent null
Approved null
Comment null
Create {6/30/2019 1:04:29 PM}
Id 0
Ip null
Karma null
Mp_Guest_Id 0
Mp_Post_Id 0
Update {6/30/2019 1:04:29 PM}
This procedure works as expected on other procedures set to accomplish this exact same feature, just on a different table!?
For example, here's what Fiddler captured on a successful POST, from an almost identical POST'ing procedure:
Fiddler Inspector
- Raw (Success for EditProject)
POST https://localhost:44390/Home/EditProject/21 HTTP/1.1
Host: localhost:44390
Connection: keep-alive
Content-Length: 555
Cache-Control: max-age=0
Origin: https://localhost:44390
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Referer: https://localhost:44390/Home/EditProject/21
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,mt;q=0.8
Cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMp2YqORrHzf5IL0rLJ8jvAP-RYvHIXeH63EfD3-TugdZGBP9nf_lHhAn71ACsIQZe_cJ1x7u3FBh25uhlXZIJX9yk7ZdH_GuwfYEe-Zaa1CSAD2f2g8U7syt8jvxy18c-qCN9Yq2zLQpBeOlzftudcaMKKrsA-UGO8BOHLPTk1TYe1QMosDGaFDLXY0POqCpluxiiA0qsA0i9iQeAP6HL7ZC8lLjf76Lf_E5usVyakwa9X3ELDJQeaEFFa5Vi_5063xCHhm3NRREE5loUCff1rKmaOKvvOR-Fnf-QtYLG-MGthgVAGah4cdXjD0jsKFBM0Ny-Yt8uRddQ26w_8AUJqhRo9jOAXEuzyhYwPRfKQKykgpy-4lVIZXc2QR25EWxq9H6zh5GGCTIitxISDcpoHf0mUqzT9aJKo_LwB6cibzbDwBmVsTc6Yn6cQA0MMoBVa6E6hKuvQoNerU7psX5z2D2k8tB8mZVlJQ3medeMwHQonOSBh99OxOrBO5K6iedlpPqSNco8r7PbNcHCdhLKehtoyJkE3tzmrv_EOTAS7ldXNhhPHqNp_RmuAdGWlsJ-a-bN5itj1hv_o7RCxl8t49XB9oddsg4iOvR-BUZOLuxJKfQ90PAH4S9BvblwLKoXx3Gt3We5WeG8Ga6rAXHQhd
Id=0&Title=Product+Engineer&Desc=nulla+neque+libero+convallis+eget+eleifend&Live_Url=bloglovin.com%2Feget%2Ftincidunt%2Feget.jpg&Github_Repo=sourceforge.net%2Fet%2Fultrices%2Fposuere%2Fcubilia.jpg&Bitbucket_Repo=creativecommons.org%2Fpede%2Flibero%2Fquis.html&Create=2011-07-11T00%3A00%3A00.000&Update=2019-06-20T00%3A00%3A00.000&__RequestVerificationToken=CfDJ8OfA6sTjcU1PuqxxzGM-oMqTHmlRblU70EY0Ou7tH2IifiXdJOCtMRepfMg-GhKz-j4at6h9BOzJTNjHIROMjDpUiOqxvDeGWcja8K-uGkYrW8DX58j9mIFlwKML9tLVtvusmGmPekVMPxYqRkKdcyLGb6qpav3upDLAvfxLblbs9RynCyG4bDTAAZ4jzxc-ww
Fiddler Inspector
- Raw (Failure for EditComments)
POST https://localhost:44390/Home/EditComment/1 HTTP/1.1
Host: localhost:44390
Connection: keep-alive
Content-Length: 606
Cache-Control: max-age=0
Origin: https://localhost:44390
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Referer: https://localhost:44390/Home/EditComment/1
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,mt;q=0.8
Cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMp2YqORrHzf5IL0rLJ8jvAP-RYvHIXeH63EfD3-TugdZGBP9nf_lHhAn71ACsIQZe_cJ1x7u3FBh25uhlXZIJX9yk7ZdH_GuwfYEe-Zaa1CSAD2f2g8U7syt8jvxy18c-qCN9Yq2zLQpBeOlzftudcaMKKrsA-UGO8BOHLPTk1TYe1QMosDGaFDLXY0POqCpluxiiA0qsA0i9iQeAP6HL7ZC8lLjf76Lf_E5usVyakwa9X3ELDJQeaEFFa5Vi_5063xCHhm3NRREE5loUCff1rKmaOKvvOR-Fnf-QtYLG-MGthgVAGah4cdXjD0jsKFBM0Ny-Yt8uRddQ26w_8AUJqhRo9jOAXEuzyhYwPRfKQKykgpy-4lVIZXc2QR25EWxq9H6zh5GGCTIitxISDcpoHf0mUqzT9aJKo_LwB6cibzbDwBmVsTc6Yn6cQA0MMoBVa6E6hKuvQoNerU7psX5z2D2k8tB8mZVlJQ3medeMwHQonOSBh99OxOrBO5K6iedlpPqSNco8r7PbNcHCdhLKehtoyJkE3tzmrv_EOTAS7ldXNhhPHqNp_RmuAdGWlsJ-a-bN5itj1hv_o7RCxl8t49XB9oddsg4iOvR-BUZOLuxJKfQ90PAH4S9BvblwLKoXx3Gt3We5WeG8Ga6rAXHQhd
Mp_Post_Id=1&Mp_Guest_Id=1&Comment=lorem+quisque+ut+erat+curabitur+gravida+nisi+at+nibh+in+hac+habitasse+platea+dictumst+aliquam&Karma=1&Approved=1&Ip=21.99.31.96&Agent=Mozilla%2F5.0+%28Macintosh%3B+U%3B+Intel+Mac+OS+X+10_7%3B+en-us%29+AppleWebKit%2F533.4+%28KHTML%2C+like+Gecko%29+Version%2F4.1+Safari%2F533.4&Create=2018-07-17T00%3A00%3A00.000&Update=2012-06-01T00%3A00%3A00.000&__RequestVerificationToken=CfDJ8OfA6sTjcU1PuqxxzGM-oMquggjJDBhMvQwfCKwHRJS9tJeBi-4bT19jJVjuUjZgYE1LD4BvCF2LBJlQ45u3d9sEGmm-l9EAhbXaA2TwuNjW4xhYpVXl4Z0YE_YBEvbuSzodxjP8v1GoYAXYfs5yl3L39SK0gp1YKkkwujMhdExO17v3n-b_y4IhhZJ3SanIZw
Note: Everything appears identical (where it should), except there's a discrepancy with the POST URL. Each time I troubleshoot this, I take the 1st entry, edit it, and then submit it. Each time I do this (on the four other procedures where this works fine), it iterates to the next entry; as seen above.
Example: A) Edit & Submit Project 1 when there's 20 Project entries:
POST https://localhost:44390/Home/EditProject/21 <=== discrepancy
B) Edit & Submit Comment 1 when there's 20 Comment entries:
POST https://localhost:44390/Home/EditComment/1 <=== discrepancy
Chrome (Network Headers)
Success (Project)
General:
Request URL: https://localhost:44390/Home/EditProject/66
Request Method: POST
Status Code: 302
Remote Address: [::1]:44390
Referrer Policy: no-referrer-when-downgrade
---------------------------------------------------------------------------------------------------
Response Headers:
content-length: 0
date: Mon, 01 Jul 2019 00:04:16 GMT
location: /Home/ViewProjects
server: Kestrel
status: 302
x-powered-by: ASP.NET
x-sourcefiles: =?UTF-8?B?QzpcV29ya3NwYWNlXHd3d1xhc3BcUG9ydGZvbGlvXFBvcnRmb2xpb1xIb21lXEVkaXRQcm9qZWN0XDY2?=
---------------------------------------------------------------------------------------------------
Request Headers:
:authority: localhost:44390
:method: POST
:path: /Home/EditProject/66
:scheme: https
accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
accept-encoding: gzip, deflate, br
accept-language: en-US,en;q=0.9,mt;q=0.8
cache-control: max-age=0
content-length: 1200
content-type: application/x-www-form-urlencoded
cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMpTJYFjUyUy3eLO3fbnX9V4SSq14P_h_AlTAyZs-9LrMW9QOzTP46d8CJetHqzamw-ulm6IbjGyC_hElFiwtJRbKAV3GuVlGQeNfbhcJ7M81EH4bqnbi-NBwP4nmlXROTG3DvMYdHqC1-eqT53ip4mnHpdLDLKlwX80Lk8uWPpiyD5L_RFiMGl5i0vOUz19bbn-mSC3IVbuGz8LeDePfKDmU-3b8_sNiZJpBpx4p6jORrds69LkpkdZX2NUWzyevM4TWw8irVRRBY0PAFKkkZEfQy52kPFfHLZgcZ2JMFo2iQ0DqRcq7nqwnU1JRbNTHEQ56WOsStWn7IGfBqA43B5QdLn-yWTiP5AIalG3kv_o-6VZTmyfu6QbBCbwD_7gpjewoB8IiYn86WaTVbvkryGBJZMjSEq5M2H1m365zI392lNZVzwDADwF04s4zYmHx8snkk9Z3NUAjvzDJo9b1IJNNIKnPmERysOR73W_hAfZdpVN0Ltx2fT7-13g4ow-2Xizi_t2b4SQcX6tC_tlju224eh0KkKNxOJ3irBQRsWAT9iKe_aaE7usFUkZgfR9vuZnPO62qzuxUwROsX3-Tz4lSxSD2N4ajqpEpVMcS528hMO5lXQwMA2RpGBKpR2JJzsN1KdbYgPcB16Ad14VgJNJ
origin: https://localhost:44390
referer: https://localhost:44390/Home/EditProject/66
upgrade-insecure-requests: 1
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
---------------------------------------------------------------------------------------------------
Form Data:
Title: Product Engineer
Desc: nulla neque libero convallis eget eleifend
Content: sodales scelerisque mauris sit amet eros suspendisse accumsan tortor quis turpis sed ante vivamus tortor duis mattis egestas metus aenean fermentum donec ut mauris eget massa tempor convallis nulla neque libero convallis eget eleifend luctus ultricies eu nibh quisque id justo sit amet sapien dignissim vestibulum vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae nulla dapibus dolor vel est donec odio justo sollicitudin ut suscipit a feugiat et eros vestibulum ac est lacinia nisi venenatis tristique fusce congue diam id ornare
Project_Image: http://dummyimage.com/193x141.jpg/ff4444/ffffff
Live_Url: bloglovin.com/eget/tincidunt/eget.jpg
Github_Repo: sourceforge.net/et/ultrices/posuere/cubilia.jpg
Bitbucket_Repo: creativecommons.org/pede/libero/quis.html
Create: 2011-07-11T00:00:00.000
Update: 2019-06-20T00:00:00.000
__RequestVerificationToken: CfDJ8OfA6sTjcU1PuqxxzGM-oMq4kGmbGOLj875J5O8hQlwLIYQR7YHYe58lgzEyN5Wat3viIjRuF80IPiwf_iRYUydAC0vfWv-q5jvLA_bAsdz7blAbvNoT4TxTYqZ5ONf5Q2bYqOyWlhdoN7ZduEaRc3dEBua_8F35F6mNuq0NFfLTDkvlCvO1da4dbhsWg49nsg
---------------------------------------------------------------------------------------------------
Failure (Comment)
General:
Request URL: https://localhost:44390/Home/EditComment/20
Request Method: POST
Status Code: 500
Remote Address: [::1]:44390
Referrer Policy: no-referrer-when-downgrade
---------------------------------------------------------------------------------------------------
Response Headers:
content-type: text/html; charset=utf-8
date: Sun, 30 Jun 2019 23:40:23 GMT
server: Kestrel
status: 500
x-powered-by: ASP.NET
x-sourcefiles: =?UTF-8?B?QzpcV29ya3NwYWNlXHd3d1xhc3BcUG9ydGZvbGlvXFBvcnRmb2xpb1xIb21lXEVkaXRDb21tZW50XDIw?=
---------------------------------------------------------------------------------------------------
Request Headers:
:authority: localhost:44390
:method: POST
:path: /Home/EditComment/20
:scheme: https
accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
accept-encoding: gzip, deflate, br
accept-language: en-US,en;q=0.9,mt;q=0.8
cache-control: max-age=0
content-length: 558
content-type: application/x-www-form-urlencoded
cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMpTJYFjUyUy3eLO3fbnX9V4SSq14P_h_AlTAyZs-9LrMW9QOzTP46d8CJetHqzamw-ulm6IbjGyC_hElFiwtJRbKAV3GuVlGQeNfbhcJ7M81EH4bqnbi-NBwP4nmlXROTG3DvMYdHqC1-eqT53ip4mnHpdLDLKlwX80Lk8uWPpiyD5L_RFiMGl5i0vOUz19bbn-mSC3IVbuGz8LeDePfKDmU-3b8_sNiZJpBpx4p6jORrds69LkpkdZX2NUWzyevM4TWw8irVRRBY0PAFKkkZEfQy52kPFfHLZgcZ2JMFo2iQ0DqRcq7nqwnU1JRbNTHEQ56WOsStWn7IGfBqA43B5QdLn-yWTiP5AIalG3kv_o-6VZTmyfu6QbBCbwD_7gpjewoB8IiYn86WaTVbvkryGBJZMjSEq5M2H1m365zI392lNZVzwDADwF04s4zYmHx8snkk9Z3NUAjvzDJo9b1IJNNIKnPmERysOR73W_hAfZdpVN0Ltx2fT7-13g4ow-2Xizi_t2b4SQcX6tC_tlju224eh0KkKNxOJ3irBQRsWAT9iKe_aaE7usFUkZgfR9vuZnPO62qzuxUwROsX3-Tz4lSxSD2N4ajqpEpVMcS528hMO5lXQwMA2RpGBKpR2JJzsN1KdbYgPcB16Ad14VgJNJ
origin: https://localhost:44390
referer: https://localhost:44390/Home/EditComment/20
upgrade-insecure-requests: 1
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
---------------------------------------------------------------------------------------------------
Form Data:
Mp_Post_Id: 20
Mp_Guest_Id: 20
Comment: etiam faucibus cursus urna ut tellus nulla ut erat id mauris vulputate elementum nullam varius nulla
Karma: 6
Approved: 0
Ip: 142.146.130.50
Agent: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20120405 Firefox/14.0a1
Create: 2010-10-21T00:00:00.000
Update: 2009-10-07T00:00:00.000
__RequestVerificationToken: CfDJ8OfA6sTjcU1PuqxxzGM-oMpEiWlpyDJHiDaw7Rz0PI6fyiscJ9aAahlk0J2Coz5R42uB-L3LvBS94t5QxvcBZ2PwMUI9McLlFR1rtds9yh89UZSzHpR-q_SvbM1g4KCUYDhvNht_bMaoy9NJvMTfOCR_TPW4CKTMnJCR8OEJYahY9CWXY_GozMl1MMkL3MFkFQ
---------------------------------------------------------------------------------------------------
Wireshark (Traffic Analysis)
Success (Edit Project)
POST /Home/EditProject/2 HTTP/1.1
Cache-Control: max-age=0
Connection: Keep-Alive
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,mt;q=0.8
Cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMqPm6KX-2uhTXr62WeE6Jia-lF8RtuWQCtjegxTJyf6k-wmUcVdvsBAhEuLKWMN_ttD6dPUr-E8QGJPI_2fD0vYnbo6ADWRXWlMFHwloQ43bPBuSn0zPyp6rZvQLaYFXQXO2aO9Kk7UF64Nh4-kJenvCOcPYtv5JS5HneYXgXO_hM26wnG-3my6SaA4ApdBYndK4DbrdB4393HtLK1579yg7ON12bDIBH71pTMdK6UuIvAI1Bh3HbkUuCOtJzZ3ZqB_JQAutgRe6z6nFGcdPMcb0VbIUPa9USyg0oUJ9KxNPspX9y_dAt4GO18OrsFd-s8d-oWV7zDEMpQVBpLoaVk23xpiObUlVLfS-OQhfVgq3RAXAfkZOR7B7eusFkr3I_ZQRb__76x8dVRvHDy-gy_2ZU1xNJve0v-L38kRsVKoXpjCfc9HW9CaVZvoOH6YB1x-gwsGB_eJ8IJsMTnscrNhDloNlel42K7q8GlA-lTK9yXgiXqLm2VAYdpCf_b45ixMba0Cr7umLyMBzf7BEo3J5uNEAYvF7qN5DOlTSbuvwP33ZbBQJyu3uwnfi4JdzYHNDtlZJqlgUkVgmw_3snp3oJxizU50DFgTUyPjAuB71aEOEyVQRXbgZbJ_S-TzLddHc-hjZarUqKK6n5MBX-8_
Host: localhost:44390
Referer: https://localhost:44390/Home/EditProject/2
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
origin: https://localhost:44390
upgrade-insecure-requests: 1
MS-ASPNETCORE-TOKEN: 2a6aebc6-e154-4f02-9517-cae788a1069f
X-Forwarded-For: [::1]:60639
X-Forwarded-Proto: https
Content-Length: 710
Title=Senior+Quality+Engineer+IV&Desc=nascetur+ridiculus+mus+vivamus+vestibulum+sagittis+sapien+cum+sociis&Content=vivamus+tortor+duis+mattis+egestas+metus+aenean+fermentum+donec+ut+mauris+eget&Project_Image=http%3A%2F%2Fdummyimage.com%2F237x180.bmp%2F5fa2dd%2Fffffff&Live_Url=ihg.com%2Fgravida%2Fnisi%2Fat%2Fnibh.json&Github_Repo=paginegialle.it%2Fligula%2Fsuspendisse.xml&Bitbucket_Repo=harvard.edu%2Fcongue.aspx&Create=2018-09-07T00%3A00%3A00.000&Update=2013-05-17T00%3A00%3A00.000&__RequestVerificationToken=CfDJ8OfA6sTjcU1PuqxxzGM-oMqFkSNAgkReKvXjTW0EStR_OB4Zz6j90ZdieDNspaE86824rUys1Av2cI9mKtO15RaMnYSiz1_As63Ez0XWxX4N3zfL4vlgGfPQ43FMqqfcPBAG33xvi4G0naOTHEVTdGbiwkLrK2UVF2O01JzfVW3olYbxna45Pg10haFTI-s5QgHTTP/1.1 302 Found
Date: Mon, 01 Jul 2019 16:19:16 GMT
Server: Kestrel
Content-Length: 0
Location: /Home/ViewProjects
Failure (Edit Comments)
POST /Home/EditComment/1 HTTP/1.1
Cache-Control: max-age=0
Connection: Keep-Alive
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,mt;q=0.8
Cookie: .AspNetCore.Antiforgery.x5eNnYCJ5UA=CfDJ8OfA6sTjcU1PuqxxzGM-oMrl1aZfFqqMphsPHMioPYeJIj8tRRSXB1N9Pm7JhspsKDyUKawAVJYkSlP56myEU4qcRohQ1axrDWFXPVvZjlNZqiRZAZVOMcZ3wupV12M_z289E7MaUrZ1nbOzH34eiH0; .AspNetCore.Identity.Application=CfDJ8OfA6sTjcU1PuqxxzGM-oMqsILl7uDq3qp0MgEGexCwq_b2cNi4376Wt5jxWgINpwDxVRedde5wkOvqycIGfKrQJM2uCVgFMc75i-3Ch_Sct3wFtj_o2wHjLt9OSgM1dieKWdY8BVsLWGHIsMkceMbh_GQz6xJsKrOixjijHUw88p990DPKm2dGJo-JLSHJpqxGNkQxlhPNPf-VsHEQmh27Mn2ah_NZj0NqIlxDuxfmeLQoV0W1s99zVg7URMUbSmGQsShrT1HxhcUjesLuGnyy90GdxmFyGf2-RKPl1zGdkQhaIgicmxQi-bR8otlu5E1uHPms-_HR3xZwT3koowKFYNM4NFHfPuQOwPgZooHCJeaYvweHuqiB5Oh98c6gRHalMSUqGApIICOfVY7mrr9uxt70PeB60PisyAfASCClKf0IsnJLh8flRZ5lr7cr4fhVXU9Jn-PS_09-iX262WvSgjWiPvfe6W_3QxhnPV1NBb0xVy7FCBNMeIIge0BftQzGMb0h_2xsCITwf9oAApXH-uTnC4E2FZI1nUzdfRVPCrj0kXsppeVr6q-65d9_cWgh2aDC4EYeCF4v__Yz9IZPoMKCvHF_rq_Vna4jLPLsobt4VcViYrSY66JmtO9IeoXpA3Ivd2P7ws4lcnJ9STgFV4oP3hmC4aRdA1BURRzz2
Host: localhost:44390
Referer: https://localhost:44390/Home/EditComment/1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
origin: https://localhost:44390
upgrade-insecure-requests: 1
MS-ASPNETCORE-TOKEN: 2a6aebc6-e154-4f02-9517-cae788a1069f
X-Forwarded-For: [::1]:61219
X-Forwarded-Proto: https
Content-Length: 606
Mp_Post_Id=1&Mp_Guest_Id=1&Comment=lorem+quisque+ut+erat+curabitur+gravida+nisi+at+nibh+in+hac+habitasse+platea+dictumst+aliquam&Karma=1&Approved=1&Ip=21.99.31.96&Agent=Mozilla%2F5.0+%28Macintosh%3B+U%3B+Intel+Mac+OS+X+10_7%3B+en-us%29+AppleWebKit%2F533.4+%28KHTML%2C+like+Gecko%29+Version%2F4.1+Safari%2F533.4&Create=2018-07-17T00%3A00%3A00.000&Update=2012-06-01T00%3A00%3A00.000&__RequestVerificationToken=CfDJ8OfA6sTjcU1PuqxxzGM-oMr9nzkkEn5p6n7jwRflZ1bmxhEOVzWiW7VXO1rmDYbHQR4CvYlmqH4LyuHMPDsQZWXE-gZ3eDU2LWqJd1uVnMKeJcbV0gne1gxSQdeg2Cd7wklVGIJAlC4PNr5hbqJmAGItiemNRukLVKMLVZ0E65dR-pVhxKy4SteMmvnDVMg5_QHTTP/1.1 500 Internal Server Error
Date: Mon, 01 Jul 2019 17:06:52 GMT
Content-Type: text/html; charset=utf-8
Server: Kestrel
Transfer-Encoding: chunked
Additional Information
Project Configuration
myProject.csproj
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.1.2" PrivateAssets="All" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.1.9" />
<PackageReference Include="MySql.data" Version="8.0.16" />
<PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.16" />
</ItemGroup>
<ItemGroup>
<Folder Include="Migrations" />
</ItemGroup>
</Project>
Database
[mpComment.sql]
CREATE TABLE [mpComment]
(
[id] INT NOT NULL PRIMARY KEY,
[mp_post_id] INT NOT NULL FOREIGN KEY REFERENCES mpPost(id),
[mp_guest_id] INT NOT NULL FOREIGN KEY REFERENCES mpGuest(id),
[comment] NVARCHAR(500) NOT NULL,
[karma] INT NULL,
[approved] INT NOT NULL,
[ip] NVARCHAR(100) NULL,
[agent] NVARCHAR(255) NULL,
[create] DATETIME NULL,
[update] DATETIME NULL,
)
Insertion Query
CommentsInsertQuery.sql
This would be exactly the same data that would be (typically) submitted through the aforementioned form; which works fine.
INSERT INTO [profileDb].[dbo].[mpComment] ([mp_post_id], [mp_guest_id], [comment], [karma], [approved], [ip], [agent], [create], [update])
VALUES (1, 1, 'lorem quisque ut erat curabitur gravida nisi at nibh in hac habitasse platea dictumst aliquam', 1, 1, '21.99.31.96', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_7; en-us) AppleWebKit/533.4 (KHTML, like Gecko) Version/4.1 Safari/533.4', '07/17/2018', '06/01/2012');
Final Thoughts
I am concerned that this issue might be occurring somewhere within the Entity Framework, where I cannot troubleshoot. If I had a sincere point of origin where I can identify exact point where the data from my browser is captured by the .Net framework, I might be able to better identify the key issue.
Similar Post:
ASP.NET CORE Web API: Model value is null when doing HTTP Post requests with null Guid
This question is very similar to an alternate question, however, there appears to be less troubleshooting, and a lot less information concerning the matter. In addition, there was not much love on this question, and no solutions provided.
Thanks in advance, and cheers
解决方案
Jerry Rigged Solution
I was able to manage a workaround, albeit, I'm still not certain "why" this error is occurring.
Synopsis
Sense the post-back data was being captured within the application (Graphic), however, it was not populating the parameter value of the EditComments method, I simply populated the data manually.
Solution
Included the Microsoft.AspNetCore.Http library within my Home Controller, and modified the following post-back method from:
HomeController.cs
[HttpPost]
public async Task<IActionResult> EditComment(MpComment comment)
{
comment.Id = 0;
_repo.AddComment(comment);
if (await _repo.SaveChangesAsync())
return RedirectToAction("ViewComments");
else
return View(comment);
}
to
HomeController.cs
[HttpPost]
public async Task<IActionResult> EditComment()
{
var form = Request.Form.ToList();
var comment = new MpComment
{
Id = 0,
Mp_Post_Id = Int32.Parse(form.Where(x => x.Key == "Mp_Post_Id").FirstOrDefault().Value),
Mp_Guest_Id = Int32.Parse(form.Where(x => x.Key == "Mp_Guest_Id").FirstOrDefault().Value),
Comment = form.Where(x => x.Key == "Comment").FirstOrDefault().Value,
Karma = Int32.Parse(form.Where(x => x.Key == "Karma").FirstOrDefault().Value),
Approved = Int32.Parse(form.Where(x => x.Key == "Approved").FirstOrDefault().Value),
Ip = form.Where(x => x.Key == "Ip").FirstOrDefault().Value,
Agent = form.Where(x => x.Key == "Agent").FirstOrDefault().Value,
Create = Convert.ToDateTime(form.Where(x => x.Key == "Create").FirstOrDefault().Value),
Update = Convert.ToDateTime(form.Where(x => x.Key == "Update").FirstOrDefault().Value)
};
_repo.AddComment(comment);
if (await _repo.SaveChangesAsync())
return RedirectToAction("ViewComments");
else
return View(comment);
}
...and everything works as expected.
Additional note
These values were easy enough to retrieve, in case anyone else has a similar issue. Simply convert the request form data into a List (as above) and print out those results via the output console.
Example:
[HttpPost]
public methodExpectingPostback()
{
var form = Request.Form.ToList();
foreach (var item in form)
{
Debug.WriteLine($"{item.Key} : {item.Value}");
}
}
这篇关于ASP.NET MVC Core Web POST 请求使用 NULL 值填充数据模型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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