WPF OpenFileDialog to read in a text file using VB.NET

In this article, we will see how to use a WPF OpenFileDialog to read in a text file.
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In this article, we will see how to use a WPF OpenFileDialog to read in a text file.

The OpenFileDialog is used to browse files on a machine. The OpenFileDialog class defined in Microsoft.Win32.OpenFileDialog namespace represents an OpenFileDialog control in WPF. We will use StackPanel and ScrollViewer in this example. This example shows how you can allow the user to click on a button and choose a text file to view the contents of the file in a scrollable box on the screen.

Example:- This code of .axml

<Window x:Class="Window1"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
   <Grid>
        <StackPanel Margin="10" HorizontalAlignment="Left">
            <StackPanel HorizontalAlignment="Left">
                <Button Content="Load File" Width="100" Background="Silver"

Height="40" FontSize="20"               
                Margin="0 0 0 10" Click="Button_Click" />
            </StackPanel>
            <ScrollViewer Width="300" Height="200" Cursor="ScrollAll">
                <Border Background="Plum"
          CornerRadius="5"
           BorderBrush="Red"
           BorderThickness="2" Cursor="SizeAll">
                    <TextBox x:Name="TextFileContent"
                TextWrapping="Wrap" Background="AliceBlue"/>
                </Border>
            </ScrollViewer>
        </StackPanel>
   </Grid>
</
Window>

This code of .vb

Imports Microsoft.Win32
Imports System.IO
---------------------------------------------------------------------------------

Class
Window1

     Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
         Dim dlg As New OpenFileDialog()
         dlg.DefaultExt = ".txt"
 
        dlg.InitialDirectory = "C:test"
 
        dlg.Filter = "Text documents (.txt)|*.txt"
 
        Dim result As System.Nullable(Of Boolean) = dlg.ShowDialog()
         If result = True Then
 
            TextFileContent.Text = File.ReadAllText(dlg.FileName)
         End If
 
    End Sub
 
End
Class
---------------------------------------------------------------------------------

Output:-

FileDialog.bmp

 I hope this code help you.

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