Base64编码保存到文件服务器

byte[] buffer = Convert.FromBase64String(param.Base64Code);
System.Net.WebClient webClient = new System.Net.WebClient();
param.MsysGuid = Utils.NewGUID;
param.FileName = String.Format("{0}.jpg", param.OrderMumber);
string webHostUrl = string.Format("http://{0}/Upload.aspx?&id={1}&fileName={2}&bufferSize={3}",Utils.FileServerIp, param.MsysGuid, Uri.EscapeDataString(param.FileName), buffer.Length, param.MsysGuid);
byte[] bytes = webClient.UploadData(webHostUrl, buffer);
string result = webClient.Encoding.GetString(bytes);
webClient.Dispose();
if (result.StartsWith("##"))
{
　　throw new Exception(result);
}