如果文件已经存在于c＃中，则增加文件名

Question

Tried the below logic in windows form for file name incremental, if the file already exists in the specified path. but the files are created with the names "New1.txt2","New1.txt2.txt3". how the files can be created as "New1.txt", "New2.txt", "New3.txt"...."Newn.txt" on every button Click?

String filename =@"C:\path";
if (File.Exists(filename))
        {
            count++;
            filename = filename + count.ToString()+".txt";

Answer 1

There is one more problem in your code. Why do you have file names like "New1.txt2","New1.txt2.txt3", "New1.txt2.txt3.txt4"? Because you don't keep initial filename somewhere. So, I'd propose to keep two variables for filenames: for instance, filename_initial and filename_current .

Try something like this:

String filename_initial = @"C:\path\New.txt";
String filename_current = filename_initial;
count = 0;
while (File.Exists(filename_current))
{
    count++;
    filename_current = Path.GetDirectoryName(filename_initial)
                     + Path.DirectorySeparatorChar
                     + Path.GetFileNameWithoutExtension(filename_initial)
                     + count.ToString()
                     + Path.GetExtension(filename_initial);
}