change the name of file instead of SaveFileDialog.OverwritePrompt

Question

in my windows form app user can add image in a folder in hard drive with saveFileDialog. How can I change the name of image instead of OverwritePrompt alert with adding a variable integer to the name of image?

Answer 1

You should implement a check of the file name just before saving :

int i = 1;
while(File.Exists(Directory.GetCurrentDirectory()
                                + "\" + saveFileDialog.FileName)
{
    saveFileDialog.FileName = saveFileDialog.FileName + "_" + i;
    i++;
}

This needs to go just before opening the stream to write the file:

System.IO.FileStream fs = (System.IO.FileStream)saveFileDialog.OpenFile();
// Write to your file
fs.Close();