Request.Files始终为null
我正在编写一个C＃ASP.Net
MVC应用程序，供客户端将文件发布到其他服务器。我正在使用通用处理程序来处理从客户端到服务器的发布文件。但是在我的处理程序中，System.Web.HttpContext.Current.Request.Files始终为空（0个计数）。
表格代码：
@model ITDB102.Models.UploadFileResultsModels@{
Layout = "~/Views/Shared/_Layout.cshtml";
}
<div>
<h1>Upload File</h1>
<form id="file-form" action="/Files/UploadFile" method="post" data-ajax="false" enctype="multipart/form-data">
<div><input type="file" id="FilePath" name="FilePath"/>
<button type="submit">Send File</button></div>
</form>
</div>
@section scripts{
<script src="~/Scripts/jquery-1.10.2.js"></script>
<script type="text/javascript">
// Variable to store your files
var files;
var form = document.getElementById('file-form');
// Add events
$('input[type=file]').on('change', prepareUpload);
// Grab the files and set them to our variable
function prepareUpload(event) {
files = $('#FilePath').get(0).files;
}
form.onsubmit = function (event) {
uploadFiles(event);
}
// Catch the form submit and upload the files
function uploadFiles(event) {
event.stopPropagation(); // Stop stuff happening
event.preventDefault(); // Totally stop stuff happening
// Create a formdata object and add the files
var data = new FormData();
if (files.lenght > 0)
{
data.append('UploadedFiles', files[0], file[0].name);
}
//setup request
var xhr = new XMLHttpRequest();
//open connection
xhr.open('POST', '/Files/UploadFile',false);
xhr.setRequestHeader("Content-Type", files.type);
//send request
xhr.send(data);
}
</script>
}
处理程序：
/// <summary> /// Uploads the file.
/// </summary>
/// <returns></returns>
[HttpPost]
public virtual ActionResult UploadFile()
{
HttpPostedFile myFile = System.Web.HttpContext.Current.Request.Files["UploadedFiles"];
bool isUploaded = false;
string message = "File upload failed";
if (myFile != null && myFile.ContentLength != 0)
{
string pathForSaving = Server.MapPath("~/Uploads");
if (this.CreateFolderIfNeeded(pathForSaving))
{
try
{
myFile.SaveAs(Path.Combine(pathForSaving, myFile.FileName));
isUploaded = true;
message = "File uploaded successfully!";
}
catch (Exception ex)
{
message = string.Format("File upload failed: {0}", ex.Message);
}
}
}
return Json(new { isUploaded = isUploaded, message = message }, "text/html");
}
#region Private Methods
/// <summary>
/// Creates the folder if needed.
/// </summary>
/// <param name="path">The path.</param>
/// <returns></returns>
private bool CreateFolderIfNeeded(string path)
{
bool result = true;
if (!Directory.Exists(path))
{
try
{
Directory.CreateDirectory(path);
}
catch (Exception)
{
/*TODO: You must process this exception.*/
result = false;
}
}
return result;
}
#endregion
请帮我。谢谢。
回答：
最后，我发现了问题。
由于var myFile =
System.Web.HttpContext.Current.Request.Files["UploadedFiles"];某些原因，控制器中的代码永远无法正常工作。我的ajax没有错。我在控制器中将代码更改为波纹管，现在可以正常工作了。
[HttpPost] public virtual ActionResult UploadFile()
{
//var myFile = System.Web.HttpContext.Current.Request.Files["UploadedFiles"];
//
bool isUploaded = false;
string message = "File upload failed";
for (int i = 0; i < Request.Files.Count; i++ )
{
var myFile = Request.Files[i];
if (myFile != null && myFile.ContentLength != 0)
{
string pathForSaving = Server.MapPath("~/Uploads");
if (this.CreateFolderIfNeeded(pathForSaving))
{
try
{
myFile.SaveAs(Path.Combine(pathForSaving, myFile.FileName));
isUploaded = true;
message = "File uploaded successfully!";
}
catch (Exception ex)
{
message = string.Format("File upload failed: {0}", ex.Message);
}
}
}
}
return Json(new { isUploaded = isUploaded, message = message }, "text/html");
}
#endregion
#region Private Methods
/// <summary>
/// Creates the folder if needed.
/// </summary>
/// <param name="path">The path.</param>
/// <returns></returns>
private bool CreateFolderIfNeeded(string path)
{
bool result = true;
if (!Directory.Exists(path))
{
try
{
Directory.CreateDirectory(path);
}
catch (Exception)
{
/*TODO: You must process this exception.*/
result = false;
}
}
return result;
}
#endregion
}
以上是 Request.Files始终为null 的全部内容， 来源链接： utcz.com/qa/409389.html
