在mvc中拖放文件-前端问题

Drag and drop files in mvc(在mvc中拖放文件)

本文介绍了在mvc中拖放文件的处理方法，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

我想通过拖放上传文件.我编写了如下代码，但每次尝试上传文件时，都会显示上传失败.谁能告诉我我错在哪里?我想从外部源中拖动项目并将其上传到我的文件夹中，但我无法做到.

I want to upload file using drag and drop. I have written code as below but every time I attempt to upload a file, it is showing upload failed. Can anyone tell me where I am wrong? I want to drag items from outer source and have it uploaded into my folder but I am not able to do it.

对于控制器:-

public ActionResult File()
{
   return View();
}

/// <summary>
/// The max file size in bytes
/// </summary>
protected int maxRequestLength
{
   get
   {
      HttpRuntimeSection section =
         ConfigurationManager.GetSection("system.web/httpRuntime") as HttpRuntimeSection;

      if (section != null)
         return section.MaxRequestLength * 1024; // Default Value
      else
         return 4096 * 1024; // Default Value
   }
}

/// <summary>
/// Checks if a file is sent to the server
/// and saves it to the Uploads folder.
/// </summary>
[HttpPost]
private void handleFileUpload()
{
   if (!string.IsNullOrEmpty(Request.Headers["X-File-Name"]))
   {
      string path = Server.MapPath(string.Format("~/Uploads/{0}", Request.Headers["X-File-Name"]));
      Stream inputStream = Request.InputStream;

      FileStream fileStream = new FileStream(path, FileMode.OpenOrCreate);

      inputStream.CopyTo(fileStream);
      fileStream.Close();
   }
}

为了查看它是:-

<!DOCTYPE html>

<html>
<head runat="server">
    <title>Drag n' Drop File Upload</title>
    <link href="/Style.css" rel="Stylesheet" />
    <style>
body
{
    font: 12px Arial;
}

#dropZone
{
    border-radius: 5px;
    border: 2px solid #ccc;
    background-color: #eee;
    width: 250px;
    padding: 50px 0;
    text-align: center;
    font-size: 18px;
    color: #555;
    margin: 50px auto;
}

#dropZone.hover
{
    border-color: #aaa;
    background-color: #ddd;
}

#dropZone.error
{
    border-color: #f00;
    background-color: #faa;
} 
    </style>
    <script src="aHR0cDovL2FqYXguYXNwbmV0Y2RuLmNvbS9hamF4L2pRdWVyeS9qcXVlcnktMS42LjEubWluLmpz"></script>

    <script type="text/javascript">
        var dropZone;

        // Initializes the dropZone
        $(document).ready(function () {
            dropZone = $('#dropZone');
            dropZone.removeClass('error');

            // Check if window.FileReader exists to make 
            // sure the browser supports file uploads
            if (typeof(window.FileReader) == 'undefined') {
                dropZone.text('Browser Not Supported!');
                dropZone.addClass('error');
                return;
            }

            // Add a nice drag effect
            dropZone[0].ondragover = function () {
                dropZone.addClass('hover');
                return false;
            };

            // Remove the drag effect when stopping our drag
            dropZone[0].ondragend = function () {
                dropZone.removeClass('hover');
                return false;
            };

            // The drop event handles the file sending
            dropZone[0].ondrop = function(event) {
                // Stop the browser from opening the file in the window
                event.preventDefault();
                dropZone.removeClass('hover');

                // Get the file and the file reader
                var file = event.dataTransfer.files[0];

               @* if(file.size > @maxRequestLength {
                            dropZone.text('File Too Large!');
                        dropZone.addClass('error');
                        return false;*@
            //    // Validate file size
            //    if(file.size > <%=maxRequestLength%>) {
            //        dropZone.text('File Too Large!');
            //    dropZone.addClass('error');
            //    return false;
            /