如何使用View Models在ASP.NET MVC 5中使用jQuery.filer插件上传多个文件 [英] How to upload multiple files with jQuery.filer plugin in ASP.NET MVC 5 using View Models

问题描述

我在 FileUpload上使用 jQuery.filer 控制在 MVC5 项目中，我想从查看到控制器使用 ViewModel 。通常我使用了一些方法，如 AJAX 和 Request.Files [n] 但是我想用 ViewModel ，因为我已经将它传递给Controller。我在上传了一个很好的例子MVC与视图模型由 @ChrisPratt ，但他不谈论多个上传，并有一些与文件上传控制相关的问题。 MVC5 。所以，你能告诉我为了从 View 到 Controller 传递多个文件，在 foreach 循环中获取这些多个文件。

查看：

  @model ExperimentViewModel 
< input type =filename =FileUploadid = filer_inputmultiple =multiple> 
 
<！ - 或 - > 
 @ Html.TextBoxFor（m => m.FileUpload，new {type =file，id =filer_input}）
 
< script> filer（{
 limit：null，
 maxSize：null，
 extensions：null，$ b $ uploadFile：{
 url：//发送请求的URL {String} 
 data：//发送给服务器的数据{Object} 
类型：'POST'，//请求的类型{String } 
 enctype：'multipart / form-data'，//请求enctype {String} 
} 
）}; 
 
函数create（event）{
 event.preventDefault（）; 
 var formdata = new FormData（$（'＃frmCreate'）。get（0））; 
 
 $ .ajax（{
 type：POST，
 url：'@ Url.Action（Create，Experiment）'，
 cache ：false，
 dataType：json，
 data：formdata，
 processData：false，
 contentType：false 
}）; 
}; 
< script> 
  

ViewModel：

  public class ExperimentViewModel 
 {
 //为简洁省略代码
 
 [DataType（DataType.Upload）] 
 public HttpPostedFileBase FileUpload {get;组; } 
} 
  

控制器：（bind（Exclude = null）] ExperimentViewModel model）

$ pre $ public $ J $ $ b {
if（ModelState.IsValid）
{
//我不知道如何检索files.Count（），IEnumerable< HttpPostedFileBase>
var files = model.FileUpload;
if（files！= null& amp; files.Count（）> 0）
{
// ???

任何帮助将不胜感激。

解决方案

========================= ====== 已解决 ================================

以下是由 @StephenMuecke 提供的解决方案。非常感谢他的巨大帮助...

查看： b
$ b

  @model ExperimentViewModel 
 
 //更改1 
 @ Html.TextBoxFor（m => m.FileUpload，new {type = file，multiple =multiple}）
 
< script> 
函数create（event）{
 event.preventDefault（）; 
 
 //更改2：因为jquery.filer将[]添加到Name参数中！ 
 $（'＃FileUpload'）。attr（'name'，'FileUpload'）; 
 
 var formdata = new FormData（$（'＃frmCreate'）。get（0））; 
 
 $ .ajax（{
 type：POST，
 url：'@ Url.Action（Create，Experiment）'，
 cache ：false，
 dataType：json，
 data：formdata，
 processData：false，
 contentType：false 
}）; 
}; 
 $ b $（'＃FileUpload'）。filer（{
 
 //为了简洁省略代码
 
 //更改3：注释掉uploadFile部分
 // uploadFile：{...} 
 
}）; 
< script> 
  

ViewModel：

  public class ExperimentViewModel 
 {
 //为简洁省略代码
 
 //更改4 
 [DataType（DataType.Upload）] 
 public IEnumerable< HttpPostedFileBase> FileUpload {get;组; } 
} 
  

控制器：
$ b

  public JsonResult Insert（ExperimentViewModel模型）// Change 5 
 {
 if（ModelState.IsValid）
 {
 // ... 
} 
} 
  

I am using jQuery.filer on a FileUpload control in an MVC5 project and I want to post multiple files from View to Controller using ViewModel. Normally I have used some approach as AJAX and Request.Files[n] but I want to use ViewModel as I already pass it to the Controller. I followed a good example File Uploads in ASP.NET MVC with View Models by @ChrisPratt, but he does not talk about multiple uploads and there are some problems related to file upload control in MVC5. So, could you please inform me what changes should be made in order to pass multiple file upload from View to Controller and get these multiple files in a foreach loop.

View:

@model ExperimentViewModel
<input type="file" name="FileUpload" id="filer_input" multiple="multiple" >

<!-- or -->
@Html.TextBoxFor(m => m.FileUpload, new { type = "file" , id="filer_input"})

<script>
    $('#filer_input').filer({
        limit: null,
        maxSize: null,
        extensions: null,
        uploadFile: {
            url: //URL to which the request is sent {String}
            data: //Data to be sent to the server {Object}
            type: 'POST', //The type of request {String}
            enctype: 'multipart/form-data', //Request enctype {String}
        }
    )};

    function create(event) {
        event.preventDefault();
        var formdata = new FormData($('#frmCreate').get(0)); 

        $.ajax({
            type: "POST",
            url: '@Url.Action("Create", "Experiment")',
            cache: false,
            dataType: "json",
            data: formdata,         
            processData: false, 
            contentType: false
        });
    };
<script>

ViewModel:

public class ExperimentViewModel
{
    //code omitted for brevity

    [DataType(DataType.Upload)]
    public HttpPostedFileBase FileUpload { get; set; }
}

Controller:

public JsonResult Insert([Bind(Exclude = null)] ExperimentViewModel model)
{
    if (ModelState.IsValid)
    {
        //I have no idea how to retrieve the files.Count(), files in an IEnumerable<HttpPostedFileBase>
        var files = model.FileUpload;
        if(files != null && files.Count() > 0)
        {
            //???
        }           
    }
}

Any help would be appreciated.

解决方案

=============================== S O L V E D ================================

Here is the solution by @StephenMuecke. Many thanks for his huge help...

View:

@model ExperimentViewModel

//Change 1
@Html.TextBoxFor(m => m.FileUpload, new { type = "file", multiple = "multiple" })

<script>        
    function create(event) {
        event.preventDefault();

        //Change 2 : Because jquery.filer adds "[]" to the Name parameter!!!
        $('#FileUpload').attr('name', 'FileUpload');

        var formdata = new FormData($('#frmCreate').get(0)); 

        $.ajax({
            type: "POST",
            url: '@Url.Action("Create", "Experiment")',
            cache: false,
            dataType: "json",
            data: formdata,         
            processData: false, 
            contentType: false
        });
    };

    $('#FileUpload').filer({

    //code omitted for brevity

    //Change 3: Comment out uploadFile section
    //uploadFile: { ... }

    });
<script>

ViewModel:

public class ExperimentViewModel
{
    //code omitted for brevity

    //Change 4
    [DataType(DataType.Upload)]
    public IEnumerable<HttpPostedFileBase> FileUpload { get; set; }
}

Controller:

public JsonResult Insert(ExperimentViewModel model) //Change 5
{
    if (ModelState.IsValid)
    {
        //...   
    }
}

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