Question

I use this code to save an avi file. When I create a new file, it’s no problem.
But When I choose an existing file, It does not work and saveFileDialog still shows.

I have set saveDialog.OverwritePrompt and saveDialog.CheckFileExists is true, but it is not ok. If I set saveDialog.OverwritePrompt is false it runs, but it does show overwrite warning

How can I solve this?

SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.OverwritePrompt = true;
DialogResult dgResult = saveDialog.ShowDialog();

if (dgResult == DialogResult.OK)
{
     exportAvi(saveDialog.FileName);
}

Answer 1

Your issue is in the exportAvi() function. You are not allowing for the file to be overwritten. I cannot see your exportAvi() function so I cannot tell you what is wrong exactly. If you post your exportAvi() function I can help you further.

saveDialog.OverwritePrompt – will only prompt the user if they want to overwrite. It will not overwrite the file. You have to handle this in your code.

saveDialog.CheckFileExists – will only check if the file exists.

Check your export function and make sure you are setting the overwrite parameter to True.