Button click action : Button Event « Windows Presentation Foundation « VB.Net Tutorial






<Window x:Class="EightBall.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Eight Ball Answer" Height="328" Width="412" >
  <Grid>
    <Grid.RowDefinitions>
      <RowDefinition Height="*" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    <Grid.Background>
      <LinearGradientBrush>
        <LinearGradientBrush.GradientStops>
          <GradientStop Offset="0.00"  Color="Red" />
          <GradientStop Offset="0.50" Color="Indigo" />
          <GradientStop Offset="1.00" Color="Violet" />
        </LinearGradientBrush.GradientStops>
      </LinearGradientBrush>
    </Grid.Background>
    <TextBox VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="10,10,13,10" Name="txtQuestion" 
             TextWrapping="Wrap" FontFamily="Verdana" FontSize="24"
             Grid.Row="0" >
      [Place question here.]
    </TextBox>
    <Button VerticalAlignment="Top" HorizontalAlignment="Left" Margin="10,0,0,20" Width="127" Height="23" Name="cmdAnswer"
            Click="cmdAnswer_Click" 
            Grid.Row="1">      
      Ask the Eight Ball
      </Button>
    <TextBox VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="10,10,13,10" Name="txtAnswer" 
             TextWrapping="Wrap" IsReadOnly="True" FontFamily="Verdana" FontSize="24" Foreground="Green"
             Grid.Row="2">
      [Answer will appear here.]
    </TextBox>    
  </Grid>
</Window>

//File:Window.xaml.vb

Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes
Imports System.Windows.Input

Namespace EightBall
  Public Partial Class Window1
    Inherits Window

    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub cmdAnswer_Click(sender As Object, e As RoutedEventArgs)
      Me.Cursor = Cursors.Wait
      System.Threading.Thread.Sleep(TimeSpan.FromSeconds(1))

      txtAnswer.Text = "asdf"
      Me.Cursor = Nothing
    End Sub

  End Class
End Namespace
WPF Button Click Action








16.7.Button Event
16.7.1.Button Click event handlerButton Click event handler
16.7.2.Button mouse down eventButton mouse down event
16.7.3.Button mouse down previewButton mouse down preview
16.7.4.Raise exception from button click eventRaise exception from button click event
16.7.5.Button click actionButton click action
16.7.6.Generate Click Events Repeatedly While a Button Is ClickedGenerate Click Events Repeatedly While a Button Is Clicked