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c#.netsequencefilenames

C# - Append Number To File Being Saved

I have created a screenshot program and all is working great. The only problem is, I am not sure how I can make it so the screenshots are saved with appending numbers.

Example: Screenshot 1, Screenshot 2, Screenshot 3, Screenshot 4, etc.

Obviously this could be applied to other files being saved. Any ideas? Thank you.

Solution

  • Here is a method I use frequently for this very case. Just pass in a string like "Screenshot" and it will find the lowest available filename in the format of "Screenshot [number]" (or just "Screenshot" if there aren't any already):

    private string GetUniqueName(string name, string folderPath)
{
    string validatedName = name;
    int tries = 1;
    while (File.Exists(folderPath + validatedName))
    {
        validatedName = string.Format("{0} [{1}]", name, tries++);
    }
    return validatedName;
}

    (Note: this is a slightly simplified version that doesn't take file extensions into account).