Extract dates from filename
- by Newbie
I have a situation where I need to extract dates from the file names whose general pattern is [filename_]YYYYMMDD[.fileExtension]
e.g. "xxx_20100326.xls" or x2v_20100326.csv
The below program does the work
//Number of charecter in the substring is set to 8
//since the length of YYYYMMDD is 8
public static string ExtractDatesFromFileNames(string fileName)
{
return fileName.Substring(fileName.IndexOf("_") + 1, 8);
}
Is there any better option of achieving the same?
I am basically looking for standard practice.
I am using C#3.0 and dotnet framework 3.5
Edit:
I have like the solution and the way of answerig of LC. I have used his program like
string regExPattern = "^(?:.*_)?([0-9]{4})([0-9]{2})([0-9]{2})(?:\\..*)?$";
string result = Regex.Match(fileName, @regExPattern).Groups[1].Value;
The input to the function is : "x2v_20100326.csv"
But the output is: 2010 instead of 20100326(which is the expected one).
Can anyone please help.
