我正在上传file.so，我想更改我的文件名。
string createfolder = "E:/tmp/jobres/" + uId;
System.IO.Directory.CreateDirectory(createfolder);
string newfilename = txtname.Text + "Resume" + fileExtension;
AsyncFileUpload1.SaveAs(Path.Combine(createfolder,newfilename ));
该时间文件的格式不同，因此无法替换。
string createfolder = "E:/tmp/jobres/" + uId;
System.IO.Directory.CreateDirectory(createfolder);
//AsyncFileUpload1.SaveAs(Path.Combine(createfolder,"Give Something Here whatever is changing at all time like time value"+AsyncFileUpload1.PostedFile.FileName));
AsyncFileUpload1.SaveAs(Path.Combine(createfolder,"DateTime.Now"+AsyncFileUpload1.PostedFile.FileName));
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