#region 判断网络文件是否存在
//bool result = false;//下载结果
//string fileUrl = "http://localhost:7070/FileUpload/135112100.jpg";
//WebResponse response = null;
//try
//{
// WebRequest req = WebRequest.Create(fileUrl);

// response = req.GetResponse();

// result = response == null ? false : true;

//}
//catch (Exception ex)
//{
// result = false;
//}
//finally
//{
// if (response != null)
// {
// response.Close();
// }
//}
#endregion