问如何在ASP.NET MVC中处理HTML5多个文件上传？

EN

$(':button').click(function(){
    var formData = new FormData($('form')[0]);
    $.ajax({
        url: '/Upload',  //my ASP.NET MVC method
        type: 'POST',
        // handle the progress report
        xhr: function() {  // Custom XMLHttpRequest
            var myXhr = $.ajaxSettings.xhr();
            if(myXhr.upload){ // Check if upload property exists
                myXhr.upload.addEventListener('progress',progressHandlingFunction,    false); // For handling the progress of the upload
            }
            return myXhr;
        },

        // Form data
        data: formData,

        //Options to tell jQuery not to process data or worry about content-type.
        cache: false,
        contentType: false,
        processData: false
    })
    .done(function(){
        alert("success");
    })
    .fail(function(){
        alert("error");
    });
});

function progressHandlingFunction(e){
    if(e.lengthComputable){
        $('progress').attr({value:e.loaded,max:e.total});
    }
}

<form enctype="multipart/form-data">
    <input name="file" type="file" />
    <input type="button" value="Upload" />
</form>
<progress></progress>

[HttpPost]
public string Upload(HttpPostedFileBase file)
{
    // do something with file
    return "you uploaded a file called " + file.FileName;
}

<form enctype="multipart/form-data">
    <input name="file" type="file" multiple="multiple" />
    <input type="button" value="Upload" />
</form>
<progress></progress>

public string Upload(IEnumerable<HttpPostedFileBase> files)
{
    foreach(var file in files)
         ...
}

public string Upload(List<HttpPostedFileBase> files)
{
    foreach(var file in files)
         ...
}

public string Upload(IEnumerable files)
{
    foreach(var file in files)
         ...
}

public string Upload(HttpPostedFileBase[] files)
{
    foreach(HttpPostedFileBase file in files)
         ...
}

public string Upload()
{
    foreach (HttpPostedFileBase uf in Request.Files)
         ...
}

public string Upload()
{
    foreach(var key in Request.Files.AllKeys)
    {
        var file = Request.Files[key];
    }
}