ASP.NET MVC中的实体验证错误 [英] Entity validation error in ASP.NET MVC
本文介绍了ASP.NET MVC中的实体验证错误的处理方法，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
单击AddNewPost页面时出现实体验证错误。通常，当您提交表单时会发生验证错误，但是当我单击实际提交表单的页面时，我收到实体验证错误。当我调试代码以检查哪些数据库实体出现问题。我看到需要三个实体。但是当我提交表单时，这些实体应该提示这样的错误。在进入表单页面时发生这些错误时可能的解决方案是什么。
我尝试了什么：
我得到的错误
'/'应用程序中的服务器错误。
一个或多个实体的验证失败。有关更多详细信息，请参阅'EntityValidationErrors'属性
Visual Studio调试图像
http://imgur.com/a/CbpEM
控制器索引和添加帖子
public ActionResult Index（）
{
AdminObserver observer1 = new AdminObserver（）;
ActivityObserver observer2 = new ActivityObserver（）;
// ForumNotifier通知程序=新的ForumNotifier（）;
ForumNotfier notifier = new ForumNotfier（）;
notifier.Subscribe（observer1）;
notifier.Subscribe（observer2）;
return View（）;
//返回View（）;
}
public ActionResult AddPost（ForumPost post）
{
post.PostedOn = DateTime.Now;
using（AppDbContext db = new AppDbContext（））
{
try {
db.ForumPosts.Add（post）;
db.SaveChanges（）;
}
catch（DbEntityValidationException e）
{
foreach（e.EntityValidationErrors中的变种）
{
Console.WriteLine（类型为\\的实体状态\{1} \中的{0} \具有以下验证错误：，
eve.Entry.Entity.GetType（）。Name，eve.Entry.State）;
foreach（var ve in eve.ValidationErrors）
{
Console.WriteLine（ - Property：\{0} \，错误：\{1} \ ，
ve.PropertyName，ve.ErrorMessage）;
}
}
throw;
}
}
ViewBag.Message =发布成功！;
ForumNotfier notifier = new ForumNotfier（）;
notifier.Notify（post）;
返回查看（索引，帖子）;
}
模型中的Forumpost
名称空间observer.Models
{
[表（ForumPosts）]
公共类ForumPost
{
[DatabaseGenerated（DatabaseGeneratedOption.Identity）]
public int Id {get;组; }
[必需]
[StringLength（20）]
公共字符串UserName {get;组; }
[必需]
[StringLength（100）]
public string Title {get;组; }
[必需]
[StringLength（100）]
public string说明{get;组; }
[必需]
public DateTime PostedOn {get;组; }
}
AddPost查看
@using（Html。 BeginForm（））
{
@ Html.AntiForgeryToken（）
< div class =form-horizontal>
< h4> ForumPost< / h4>
< hr />
@ Html.ValidationSummary（true，，new {@class =text-danger}）
< div class =form-group>
@ Html.LabelFor（model => model.UserName，htmlAttributes：new {@class =control-label col-md-2}）
< div class =col-md- 10\" >
@ Html.EditorFor（model => model.UserName，new {htmlAttributes = new {@class =form-control}}）
@ Html.ValidationMessageFor（model => model.UserName ，，新{@class =text-danger}）
< / div>
< / div>
< div class =form-group>
@ Html.LabelFor（model => model.Title，htmlAttributes：new {@class =control-label col-md-2}）
< div class =col-md- 10\" >
@ Html.EditorFor（model => model.Title，new {htmlAttributes = new {@class =form-control}}）
@ Html.ValidationMessageFor（model => model.Title ，，新{@class =text-danger}）
< / div>
< / div>
< div class =form-group>
@ Html.LabelFor（model => model.Description，htmlAttributes：new {@class =control-label col-md-2}）
< div class =col-md- 10\" >
@ Html.EditorFor（model => model.Description，new {htmlAttributes = new {@class =form-control}}）
@ Html.ValidationMessageFor（model => model.Description ，，新{@class =text-danger}）
< / div>
< / div>
< div class =form-group>
@ Html.LabelFor（model => model.PostedOn，htmlAttributes：new {@class =control-label col-md-2}）
< div class =col-md- 10\" >
@ Html.EditorFor（model => model.PostedOn，new {htmlAttributes = new {@class =form-control}}）
@ Html.ValidationMessageFor（model => model.PostedOn ，，新{@class =text-danger}）
< / div>
< / div>
< div class =form-group>
< div class =col-md-offset-2 col-md-10>
< input type =submitvalue =创建class =btn btn-default/>
< / div>
< / div>
< / div>
}
解决方案
1。确保在appSettings下的web.config中有以下行
< add key = ClientValidationEnabled value = true / >
< add key = UnobtrusiveJavaScriptEnabled value = true / >
2.确保_Layout.cshtml中有以下内容（我假设您的默认母版页），将其放在jquery下面/@Scripts.Render(\"~/bundles/jquery）。希望你有相同的设置。
@ Scripts.Render（〜/ bundles / jqueryval）
I am getting Entity Validation Error on clicking to the AddNewPost Page. usually the validation error occurs when you submit the form but when i click on the page where actually the submit form is, i am getting an entity validation error. When i debug the code to check which database entities are making problem. i saw three entities are required. but these entities should prompted such error when i submit the form. what are the possible solutions when these error occurs on going to the form page.
What I have tried:
The error I am getting
Server Error in '/' Application. Validation failed for one or more entities. See 'EntityValidationErrors' property for more details
Visual Studio Debugging Image
http://imgur.com/a/CbpEM
Controllers Index and add post
public ActionResult Index()
{
AdminObserver observer1 = new AdminObserver();
ActivityObserver observer2 = new ActivityObserver();
// ForumNotifier notifier = new ForumNotifier();
ForumNotfier notifier = new ForumNotfier();
notifier.Subscribe(observer1);
notifier.Subscribe(observer2);
return View();
//return View();
}
public ActionResult AddPost(ForumPost post)
{
post.PostedOn = DateTime.Now;
using (AppDbContext db = new AppDbContext())
{
try {
db.ForumPosts.Add(post);
db.SaveChanges();
}
catch (DbEntityValidationException e)
{
foreach (var eve in e.EntityValidationErrors)
{
Console.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
eve.Entry.Entity.GetType().Name, eve.Entry.State);
foreach (var ve in eve.ValidationErrors)
{
Console.WriteLine("- Property: \"{0}\", Error: \"{1}\"",
ve.PropertyName, ve.ErrorMessage);
}
}
throw;
}
}
ViewBag.Message = "Post submitted successfully!";
ForumNotfier notifier = new ForumNotfier();
notifier.Notify(post);
return View("Index", post);
}
Forumpost in model
namespace observer.Models
{
[Table("ForumPosts")]
public class ForumPost
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
[Required]
[StringLength(20)]
public string UserName { get; set; }
[Required]
[StringLength(100)]
public string Title { get; set; }
[Required]
[StringLength(100)]
public string Description { get; set; }
[Required]
public DateTime PostedOn { get; set; }
}
AddPost View
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>ForumPost</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.UserName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.UserName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.UserName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Title, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Title, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Title, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Description, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Description, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Description, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.PostedOn, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.PostedOn, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.PostedOn, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
} 解决方案
1. Make sure you have the following line in web.config under appSettings
<add key="ClientValidationEnabled" value="true" /> <add key="UnobtrusiveJavaScriptEnabled" value="true" />
2. make sure you have the following in the _Layout.cshtml (i assumed that your default master page), place it below the jQUery/@Scripts.Render("~/bundles/jquery"). Hopefully you have the same setting.
@Scripts.Render("~/bundles/jqueryval")
这篇关于ASP.NET MVC中的实体验证错误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！
查看全文
