Generate Filename

Rajkumar R

Hi,

How to construct filename for the this(abc_{yyMMdd}_xyz_{HHmm}.txt) format, The function should return filename like this abc_140822_xyz_1446.txt.

Please post solution for this post.

Thanks in Advance

4 Replies

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Vulpes12y ago
Try this:

using System;
using System.Text.RegularExpressions;

class Test
{
static void Main()
{
string[] fileTemplates =
{
"abc_{yyMMdd}_xyz_{HHmm}.txt",
"abc_{yyMMdd}_xyz_{HHmm}",
"abc_{yyMMdd_HHmm}"
};

foreach(string fileTemplate in fileTemplates)
{
string f = GetFileNameFromTemplate(fileTemplate);
Console.WriteLine(f);
}

Console.ReadKey();
}

static string GetFileNameFromTemplate(string fileTemplate)
{
DateTime now = DateTime.Now;
string r = @"\{(.*?)}";
string f = Regex.Replace(fileTemplate, r, m => now.ToString(m.Groups[1].Value));
if (!f.EndsWith(".txt")) f += ".txt";
return f;
}
}

When I tried it just now (UK time) the output was:

abc_140822_xyz_1556.txt
abc_140822_xyz_1556.txt
abc_140822_1556.txt

+1
Kalai12y ago
Pls check this.

http://www.codeproject.com/Questions/322056/search-files-in-directory-Csharp
0
Rajkumar R12y ago
Hi

I will pass this "abc_{yyMMdd}_xyz_{HHmm}" as an input parameter to the function. The function should return appropriate filename. Sometime the input parameter may be like this "abc_{yyMMdd_HHmm}." So the function should handle all the cases,

Thanks in Advance.

0
Kalai12y ago
Try this method.

public string GenerateFileName()
{
string yy = DateTime.Now.Year.ToString();
yy = yy.Substring(yy.Length - 2);
string mm = DateTime.Now.Month.ToString().Length == 1 ? "0" + DateTime.Now.Month.ToString() : DateTime.Now.Month.ToString();
string dd = DateTime.Now.Day.ToString().Length == 1 ? "0" + DateTime.Now.Day.ToString() : DateTime.Now.Day.ToString();
string filename = "abc_" + yy + mm + dd + "_xyz_" + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + ".txt";
return filename;
}
0