CODEWITHSUNDEEP
c#datetimefilenames
vK 3 1 RON
vK 3 1 RON

Reputation: 115

Saving Filename based on time

I'm making a basic program, and when it comes to saving data I'm trying to put it into a .txt - which is working just fine. Problem is, I can't save the seconds/hours in addition to the date, so my solution was to just get the date and then put 1, 2, 3 respectively on most recent files. The code I made was: 

static string FileName()
{
    string fileName = "";
    char last = ' ';
    int lastDigit = 0;
    string lastDigitString = "";
    string directory = Directory.GetCurrentDirectory(); 
    if (File.Exists(DateTime.Now.Date.ToString("dd-MM-yy" + "1") + ".txt"))
    {
        fileName = Path.GetFileNameWithoutExtension(newFileName + ".txt");
        last = fileName[fileName.Length - 1];
        lastDigit = int.Parse(last.ToString());
        lastDigit = lastDigit + 1;
        lastDigitString = lastDigit.ToString();
        newFileName = fileName + lastDigitString;
    }
    else
    {
        newFileName = DateTime.Now.Date.ToString("dd-MM-yy" + "1");
    }

    return fileName;
}

with newFileName being defined as a global variable at the top. 

public static string newFileName = DateTime.Now.Date.ToString("dd-MM-yy" + "1");

I've been messing around with some things might be out of place. My solution was to get the filename and then take off the .txt - which would then leave me with just the name where I get the last digit of the name and then increase it by one, then add it to the end of a new file name. It goes 'FileName1' then 'FileName12' which is what I hoped to get, but once there it just keeps adding to 'FileName12' which is obviously from the appending set to true, but I hoped for a 'FileName123'.

Upvotes: 3

Views: 742

Answers (2)

Maytham Fahmi
Maytham Fahmi

Reputation: 33437

This is because time has colon : and it is not supported as windows file

Upvotes: 1

Babak Naffas
Babak Naffas

Reputation: 12581

Is there a requirement not to use the Hour/Minute/Second for your file name? You are using DateTime.Now.Date.ToString(..), which will strip out the hour/minute/second data. You can use DateTime.Now.ToString(..) to reserve the sub-day data.

You'll need to provide your own format string to generate a file-name-friendly output.

Upvotes: 2

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