Change file name of FILE UPLOAD control - asp.net

Question

This is my code:
if (FileUpload1.HasFile)
{
try
{
string file_name = Path.GetFileName(FileUpload1.FileName);
FileUpload1.SaveAs(Server.MapPath("~/FoodImage/1/") + file_name);
Label1.Text = "File Upload";
}
catch(Exception)
{
Label1.Text = "Can not Upload File!";
}
}
that code browse the for example "logo.jpg" and save in my server,but i want before to save change the file name,for example Browse button press and choose "logo.jpg" and click open then change the main file name "logo.jpg" to "L1.jpg" and save.

Answer 1

Try this:
//Check if user has selected a file and the file size is not 0
if (FileUpload1.HasFile && FileUpload1.PostedFile.ContentLength > 0)
{
//Set the name you want for the file with no file extension
string newFilename = "L1";
//Get the file extension of the file being uploaded.
string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
//Combine the new filename and the extension. You want to make sure it's the same file extension.
string updatedFilename = newFilename + fileExtension;
//Set the upload location
string SaveLocation = Server.MapPath("~/FoodImage/1/");
bool hasErrors = false;
try
{
//Save the file to location with new filename
FileUpload1.SaveAs(Path.Combine(SaveLocation + updatedFilename));
hasErrors = false;
}
catch (Exception ex)
{
//Display error if any
lblUploadStatus.Text = "Error uploading file. " + ex.Message.ToString();
lblUploadStatus.ForeColor = System.Drawing.Color.Red;
lblUploadStatus.Visible = true;
hasErrors = true;
}
finally
{
//Do something or display success or failure
if (hasErrors == false)
{
lblUploadStatus.Text = "File sucessfully uploaded with new filename: " + updatedFilename;
lblUploadStatus.ForeColor = System.Drawing.Color.Green;
lblUploadStatus.Visible = true;
}
}
}

Answer 2

asp:FileUpload gets rendered as input type="file" and it does not have that option. You can however do this simple workaround. That is, place a textbox below the FileUpload and prompt the user to enter the desired file name there.