CODEWITHSUNDEEP
c#filestreamwriter
user285372
user285372

Reputation:

Writing to file by creating further files (and not replacing/overwriting)

Is there any way to modify the following simple code, so that once the file myBackup.csv is created and the code is run over and over again, it doesn't just re-write the same file and destroy the previous contents, but creates further files?

string localPath = somePath + Path.DirectorySeparatorChar + "myBackup.csv";
StreamWriter sw = new StreamWriter( localPath );
sw.WriteLine( "blah blah:" );
foreach ( var element in entryId )
    sw.WriteLine( element );
localSaver.Close();

Upvotes: 1

Views: 42

Answers (1)

Patrick Hofman
Patrick Hofman

Reputation: 156918

So you want to check if the file exists and choose another file name if the file exists?

string localPath = somePath + Path.DirectorySeparatorChar + "myBackup.csv";

int counter = 1;
while (File.Exists(localPath))
{
    localPath = somePath + Path.DirectorySeparatorChar + "myBackup-" + counter + ".csv";

    counter++;
}

Then use localPath in your StreamWriter constructor.

Upvotes: 3

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