AjaxFileUpload + *.ashx 文件上传在IE8.0(XP,VS2010，Development Server)下的注意

function UploadFile(elmFlag) {
$.ajaxFileUpload({
url: '/FileUpload.ashx',
secureuri: false,
fileElementId: "fu" + elmFlag,
dataType: "json",
success: function (data, status) {
if (data.Code == 200) {
alert( unescape(data.Name));
} else {
alert( unescape(data.Msg));
}
$("#c_" + elmFlag).empty();
$("#c_" + elmFlag).append("<input type='file' name='fu" + elmFlag + "' id='fu" + elmFlag + "' onchange=\"UploadFile('" + elmFlag + "')\"   />");

},
error: function (data, status, e) {
alert("错误：上传组件错误，请检察网络!");
}
});

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.IO;
using System.Web.Hosting;
using F.Studio.Common;

using Microsoft.Practices.Unity;
using JLMFG.Doc.BLL;
using JLMFG.Doc.Domain;

namespace JLMFG.Doc.Web
{
/// <summary>
/// FileUpload 的摘要说明
/// </summary>
public class FileUpload : IHttpHandler,IBuildUp
{

static readonly string C_FileRoot = "/Files/";

[Dependency]
public doc_DocManager DocMgr { get; set; }

private HttpRequest Request { get;  set; }
private HttpResponse Response { get; set; }
private JavaScriptSerializer Serializer { get; set; }
public void ProcessRequest(HttpContext context)
{
Request = context.Request;
Response = context.Response;
Serializer = new JavaScriptSerializer();

Response.ContentType = "text/html";
Response.Expires = -1;

try
{

if (Request.Files.Count <= 0) throw new Exception("没有文件上传!");

SaveFile();
}
catch (Exception ex)
{
var resp=new UploadResponse(){Code=400,Msg=StringHelper.Escape(ex.Message)};
Response.Write(Serializer.Serialize(resp));
}

Response.End();

}

private void  SaveFile()
{

var file = Request.Files[0];
var ext = Path.GetExtension(file.FileName);

//确保目录存在
string path =  C_FileRoot + DateTime.Now.ToString("yyyy-MM-dd") + "/";

if (!Directory.Exists( HostingEnvironment.MapPath(path)))
{
Directory.CreateDirectory(HostingEnvironment.MapPath(path));
}
//合成文件名
var filename= path + Guid.NewGuid().ToString("N").Substring(0,8) + ext;

var resp = new UploadResponse();
resp.MIME = file.ContentType;
resp.Size = file.ContentLength / 1024;
resp.Name =StringHelper.Escape( Path.GetFileNameWithoutExtension(file.FileName));
resp.Path =StringHelper.Escape( filename);
resp.Code = 200;
resp.Msg = "Success";

//保持文件
file.SaveAs(System.Web.Hosting.HostingEnvironment.MapPath(filename));

Response.Write(Serializer.Serialize(resp));
}

public bool IsReusable
{
get
{
return false;
}
}

public class UploadResponse
{
public int Code { get; set; }
public string Msg { get; set; }
public string Path { get; set; }
public string Name { get; set; }
public long Size { get; set; }
public string MIME { get; set; }

}
}
}