WebClient 上传文件

iis6.0 条件：必须启用WEBDAV  需要将要上传到的目录权限加上匿名登陆，而且必须在IIS上创建虚拟目录，将文件上传到虚拟目录才能成功，否则就会出现403禁止错误下面放上我测试好的代码。

  /// <summary>         /// 上传文件到服务器         /// </summary>   

 /// <param name="localFile">本地文件 如c;\ad.jpg</param>        

/// <param name="urlString">上传文件路径 如 http://ab.com/ </param>     

 /// <param name="isRenName">是否重命名</param>   

/// <returns></returns>       

  public static string UploadFile(string localFile,string urlString,bool isRenName)         {       

  string fileName = localFile.Substring(localFile.LastIndexOf('\\')+1);         

 if (isRenName) { 

 fileName = DateTime.Now.ToString("yyyyMMddhhsss")+ Path.GetExtension(localFile) ;             }            

WebClient web = new WebClient();            

web.Credentials = CredentialCache.DefaultCredentials;           

  FileStream fs = new FileStream(localFile,FileMode.Open,FileAccess.Read);           

  BinaryReader br = new BinaryReader(fs);            

byte[] by = br.ReadBytes((int)fs.Length);            

Stream postStream = web.OpenWrite(urlString+fileName,"PUT");           

   if (postStream.CanWrite)      {  

postStream.Write(by, 0, by.Length);  

postStream.Flush();                

postStream.Close();                

fs.Dispose();             }

return urlString;

        }