Handler/UploadHandler.ashx.cs

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

namespace FileUploadSample.Handler
{
    /// <summary>
    /// Summary description for $codebehindclassname$
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class UploadHandler : IHttpHandler
    {
        /// <summary>
        /// 上传文件夹
        /// </summary>
        private  const string UPLOAD_FOLDER = "~/UploadFile/";

        public void ProcessRequest(HttpContext context)
        {
            int resultVal = (int)ReturnVal.Failed;
            string filename = "";
            try
            {
                HttpPostedFile myFile = context.Request.Files["fulFile"];  

                if (myFile != null)
                {
                    if (myFile.InputStream.Length != 0)
                    {
                        string originalFileName = Path.GetFileName(myFile.FileName);     //原文件名                        
                        string newFileName = string.Format("{0}_{1}", Guid.NewGuid(), originalFileName);   //新文件名---组成形式：  GUID + 下划线 + 原文件名
                        filename = newFileName;
                        string fileAbsPath = context.Server.MapPath(UPLOAD_FOLDER) + newFileName;   //绝对路径

                        myFile.SaveAs(fileAbsPath);

                        resultVal = (int)ReturnVal.Succeed;
                    }
                    else
                    {
                        resultVal = (int)ReturnVal.FileEmpty;
                    }
                }
                else
                {
                    resultVal = (int)ReturnVal.NotSelected;
                }
            }
            catch (Exception)
            {
                resultVal = (int)ReturnVal.Failed;
            }
            finally
            {
                string StrJson = "{\"filename\":\"" + UPLOAD_FOLDER+ filename + "\",\"resultVal\":" + resultVal + "}";
                context.Response.Write(StrJson);
            }
        }