Jquery Uploadify上传带进度条的简单实例_jquery

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using System;
using System.Web;
using System.IO;

public class UploadHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
context.Response.Charset = "utf-8";

HttpPostedFile file = context.Request.Files["Filedata"];
string uploadPath = HttpContext.Current.Server.MapPath(@context.Request["folder"]);

if (file != null)
{
if (!Directory.Exists(uploadPath))
{
Directory.CreateDirectory(uploadPath);
}
file.SaveAs(Path.Combine(uploadPath, file.FileName));
context.Response.Write("1");
}
else
{
context.Response.Write("0");
}
}

public bool IsReusable
{
get
{
return false;
}
}
}