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How to Get the list of files from Directory in C# ?

This blog post will explain in simple steps on how to the list of files within a directory using C#.

Here’s a simple example that gets all the file names from a given directory .

The Directory class defined in the System.IO namespace provides the static GetFiles method that retreives all the file names with the complete path in the directory .


How to retreive the list of files from Directory in C# ?

The below will retreive all the files names along with its complete path from C:\temp

private void Form1_Load(object sender, EventArgs e)
{
     string[] lstFiles = Directory.GetFiles(@"c:\temp");
     foreach (string file in lstFiles)
     {
          listBox1.Items.Add(file);
     }
}

It is also possible to filter and select only the files with a particular extension .

For example , if i want to search for all exe files with in the folder , i can use the filter as stated below .

private void Form1_Load(object sender, EventArgs e)
{
     string[] lstFiles = Directory.GetFiles(@"c:\temp","*.exe");
     foreach (string file in lstFiles)
     {
          listBox1.Items.Add(file);
     }
}

The above examples doesnot search the sub directories , to include the sub directories , we can pass the third parameter of type enum “SearchOption.AllDirectories” .