Question

For example: I want to know if there are images in a directory (eg. “.jpg”) I want to return a boolean value that confirm whether there are files with that extension or not.

At first I started with the following code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim Path1 As String
    FolderBrowserDialog1.ShowDialog()
    Path1 = FolderBrowserDialog1.SelectedPath
    TextBox1.Text = FolderBrowserDialog1.SelectedPath 'ignore this
    If System.IO.File.Exists(Path1 + "\*.jpg") = True Then
        Label1.Text = "At least there is a .jpg"
    End If
End Sub

It did not work and I thought use System.IO.Directory.GetFiles.The problem is how I can use it to give me back a value true / false, or rather to see if there is such file types

Answer 1

You can use Directory.EnumerateFiles along with Enumerable.Any:

Dim exists As Boolean = Directory.EnumerateFiles(folderName, "*.jpg").Any()

GetFiles should also work (if you’re in .NET 3.5), but will be less efficient:

Dim exists As Boolean = Directory.GetFiles(folderName, "*.jpg").Any()