asp.net 上传控件是第一次在 Ipad 中上传文件，但之后没有上传，甚至没有显示任何错误
代码如下
protected void UploadThisFile(FileUpload upload)
{
try
{
string folderpath = ConfigurationManager.AppSettings["BTCommDynamic"].ToString() + ConfigurationManager.AppSettings["Attachments"].ToString();
Guid fileguid = Guid.NewGuid();
string filename = fileguid + upload.FileName;
if (upload.HasFile && dtFiles != null)
{
DataRow drFileRow = dtFiles.NewRow();
drFileRow["FileName"] = upload.FileName;
string theFileName = Path.Combine(Server.MapPath(folderpath), filename);
string theFileName1 = Path.Combine(folderpath, filename);
//string theFileName = folderpath;
//to save the file in specified path
upload.SaveAs(theFileName);
drFileRow["FilePath"] = theFileName1;
double Filesize = (upload.FileContent.Length);
if (Filesize > 1024)
{
drFileRow["FileSize"] = (upload.FileContent.Length / 1024).ToString() + " KB";
}
else
{
drFileRow["FileSize"] = (upload.FileContent.Length).ToString() + " Bytes";
}
dtFiles.Rows.Add(drFileRow);
gvAttachment.DataSource = dtFiles;
gvAttachment.DataBind();
}
}
catch (Exception ex)
{
string message = Utility.GetExceptionMessage(ex.GetType().ToString(), ex.Message);
Display_Message(message);
}
}