Canvas Positioning Properties Sample

     


<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Canvas_Positioning_Properties.Window1"
    Title="Canvas Positioning Properties">
  <StackPanel>
    <Canvas Name="canvas1" Height="300">
        <TextBlock Name="text1" FontWeight="Bold" Canvas.Left="0" Canvas.Right="0" Canvas.Top="0" Canvas.Bottom="0">A TextBlock.</TextBlock>
  </Canvas>

    <ListBox Grid.Column="3" Grid.Row="1" VerticalAlignment="Top" Width="60" Margin="10,0,0,0" SelectionChanged="ChangeLeft">
      <ListBoxItem>Auto</ListBoxItem>      
      <ListBoxItem>10</ListBoxItem>
      <ListBoxItem>20</ListBoxItem>
      <ListBoxItem>30</ListBoxItem>
      <ListBoxItem>40</ListBoxItem>
      <ListBoxItem>50</ListBoxItem>
      <ListBoxItem>60</ListBoxItem>
      <ListBoxItem>70</ListBoxItem>
      <ListBoxItem>80</ListBoxItem>
      <ListBoxItem>90</ListBoxItem>
      <ListBoxItem>100</ListBoxItem>      
    </ListBox>
  </StackPanel>        
</Window>
//File:Window.xaml.vb

Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Documents
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Imports System.Windows.Data

Namespace Canvas_Positioning_Properties

  Public Partial Class Window1
    Inherits Window
    Public Sub ChangeLeft(sender As Object, args As SelectionChangedEventArgs)
      Dim li As ListBoxItem = TryCast(TryCast(sender, ListBox).SelectedItem, ListBoxItem)
      Dim myLengthConverter As New LengthConverter()
      Dim db1 As [Double] = CType(myLengthConverter.ConvertFromString(li.Content.ToString()), [Double])
      Canvas.SetLeft(text1, db1)
      Console.WriteLine(myLengthConverter.ConvertToString(Canvas.GetLeft(text1)))
    End Sub


  End Class
End Namespace

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18.	Aligning elements using multiple attached properties of Canvas
19.	Layer elements in a Canvas element
20.	Use the four attached properties of the Canvas element: Bottom, Left, Right, and Top
21.	Canvas PreviewMouseDown action and MouseDown action
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Canvas Positioning Properties Sample : Canvas « Windows Presentation Foundation « VB.Net

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