Search File inside a folder using wild card

Question

I try to search a file using wild card.My code is:

 string SearchQuery =''; List<ATTFile> lstFiles = new List<ATTFile>(); if (Directory.Exists(FilePath)) { DirectoryInfo dirInfo = new DirectoryInfo(FilePath);//File PAth is not a problem. foreach (FileInfo file in dirInfo.GetFiles(SearchQuery + "?"))//Want help here { ATTFile obj = new ATTFile(); obj.FileName = file.Name; obj.Folder = file.Directory.ToString(); obj.Size = int.Parse(file.Length.ToString()); obj.Extension = file.Extension; lstFiles.Add(obj); } }

Code Works if I give full file name. For Example: Inside a directory I have following files.

and.jpg asp.jpg bb.jpg cc.jpg

Using above code if I give full file name its work means SearchQuery ="and.jpg".Its work.But If I give SearchQuery ="a" I want a result

and.jpg asp.jpg

Starts all files with a.Is it possible using wild card inside GetFiles(SearchQuery + "?").Thanks.

Habib · Accepted Answer · 2012-09-28 09:33:54Z

Use DirectoryInfo.GetFiles Method (String), you can specify wild card with it

* - Zero or more characters. ? - Exactly one character.

You can try:

dirInfo.GetFiles("a*");

instead of ? you may use * in your query to get files which starts with searchquery and ends with any other characters.

Tim Schmelter · Accepted Answer · 2012-09-28 09:43:09Z

You can use the overload that takes the search pattern:

String fileNamePart = "a"; String fileExtension= ".jpg"; String searchPattern = String.Format("{0}*{1}", fileNamePart, fileExtension); dirInfo.GetFiles(searchPattern)

If you want all in one query, you can also use LINQ:

lstFiles = dirInfo.EnumerateFiles(searchPattern) .Select(file => new ATTFile(){ FileName = file.Name; Folder = file.Directory.ToString(); Size = int.Parse(file.Length.ToString()); Extension = file.Extension; }).ToList();

Note that i'm using DirectoryInfo.EnumerateFiles here since it can be more resource-efficient when you are working with many files and directories.

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