Get multiple files with different extension

Question

hi, as i know that method GetFiles() cannot get multiple extension, so is there a way that i could get files with multiple extension?

Rather than as below which it only will get all files with .txt extension:

            FileInfo[] fiArr = Folder1.GetFiles("*.txt");

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kok loong

Answer 1

hi, as i know that method GetFiles() cannot get multiple extension, so is there a way that i could get files with multiple extension?

Rather than as below which it only will get all files with .txt extension:

            FileInfo[] fiArr = Folder1.GetFiles("*.txt");

---

kok loong

Hello kokloong,

 

you can use  FileInfo[] fiArr = Folder1.GetFiles("*.*");

 

Hello

---

Carmelo La Monica  http://community.visual-basic.it/carmelolamonica/

Answer 2

hi carmelo, i get it. but how about if i only want to get 2 extension only? maybe i would like to get files with extension .txt and .bmp. can this be done?

---

kok loong

Answer 3

While GetFiles is good for this purpose, .NET 4 comes with a more efficient method EnumerateFiles(). 

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Agility. http://salakoahmed.blogspot.com

Answer 4

hi carmelo, i get it. but how about if i only want to get 2 extension only? maybe i would like to get files with extension .txt and .bmp. can this be done?

---

kok loong

Hello kokloong,

 

  private void button1_Click(object sender, EventArgs e)
  {
   FileInfo[] fiArr = Folder1.GetFiles("(*.*)|*.*|(*.bmp)|*.bmp");
  }

Hello

---

Carmelo La Monica  http://community.visual-basic.it/carmelolamonica/

Answer 5

Hi Carmelo, I tried but error occured (ArgumentException was unhandled - Illegal characters in path).

FileInfo[] fiArr = Folder1.GetFiles("(*.txt)|*.txt|(*.bmp)|*.bmp");
FileInfo[] fiArr2 = Folder2.GetFiles("(*.txt)|*.txt|(*.bmp)|*.bmp");

---

kok loong

Answer 6

On 6/5/2011 6:32 AM, Carmelo La Monica wrote:

>     hi carmelo, i get it. but how about if i only want to get 2

>     extension only? maybe i would like to get files with extension .txt

>     and .bmp. can this be done?

>     ------------------------------------------------------------------------

>     kok loong

>

>

> Hello kokloong,

>

>    private  void  button1_Click(object  sender, EventArgs e)

>    {

>     FileInfo[] fiArr = Folder1.GetFiles("(*.*)|*.*|(*.bmp)|*.bmp");

>    }

>

> Hello

> ------------------------------------------------------------------------

> Carmelo La Monica http://community.visual-basic.it/carmelolamonica/

 Just comeback with all the files in the array and filter with Linq if

using VS 2008 or better.

 

var files = (from a in fiArr where a.EndsWith("bmp") ||

n.EndsWith("txt") select a).ToArray();

 

foreach(var filename in files)

{

    string thename = filename;

 

}

 

Answer 7

hi carmelo, i get it. but how about if i only want to get 2 extension only? maybe i would like to get files with extension .txt and .bmp. can this be done?

---

kok loong

Hello kokloong,

 

I agree with what is written by darnold924,

I tried this code then writes the result inside a RichTextBox:

 

 

 private void button1_Click(object sender, EventArgs e)
 {
 DirectoryInfo folder = new DirectoryInfo(@"J:\");

 FileInfo[] fiArr = folder.GetFiles("*.*");

 var files = from a in fiArr
  where a.ToString().EndsWith(".txt") || a.ToString().EndsWith(".bmp")
  select a;

 foreach (var filename in files)
 {
 richTextBox1.Text = richTextBox1.Text + filename + "'\n'"; 
 }
 }

 PS: if this post help you find and mark the right and proper response
darnold924, as I prepared the sample in his suggestion.

 

Hello kokloong and Thanks darnold934

 

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Carmelo La Monica  http://community.visual-basic.it/carmelolamonica/

Answer 8

You can't set more search filters, because GetFiles only accepts a single search pattern. Instead, you can call GetFiles with no pattern, and filter the results in code, using Lambda expressions:

 

    public YourMethodToStart()
    {
      FileInfo[] fiels = GetFilesFromFolder(@"C:\1");
    }

    private FileInfo[] GetFilesFromFolder(string path)
    {     
      string[] extensions = new[] { ".txt", ".zip", ".exe" };
      DirectoryInfo dInfo = new DirectoryInfo(path);

      FileInfo[] files = dInfo.GetFiles()
        .Where(f => extensions.Contains(f.Extension.ToLower()))
        .ToArray();
      return files;
    }

 

 

---

Mitja

Answer 9

Hi all,

Thank you very much for giving me so many ways to solve my problem.

---

kok loong