Use LengthConverter : IValueConverter « Windows Presentation Foundation « C# / CSharp Tutorial






<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.cs

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Data;

namespace Canvas_Positioning_Properties
{

  public partial class Window1 : Window
  {
    public void ChangeLeft(object sender, SelectionChangedEventArgs args)
    {
      ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
      LengthConverter myLengthConverter = new LengthConverter();
      Double db1 = (Double)myLengthConverter.ConvertFromString(li.Content.ToString());
      Canvas.SetLeft(text1, db1);
      Console.WriteLine(myLengthConverter.ConvertToString(Canvas.GetLeft(text1)));
    }


  }
}
WPF Use Length Converter








24.146.IValueConverter
24.146.1.IMultiValueConverter and IValueConverterIMultiValueConverter and IValueConverter
24.146.2.Decimal ScrollBar Window with extending IValueConverterDecimal ScrollBar Window with extending IValueConverter
24.146.3.Extend IValueConverter to create your own converterExtend IValueConverter to create your own converter
24.146.4.Debug Data Bindings Using an Empty IValueConverterDebug Data Bindings Using an Empty IValueConverter
24.146.5.Use LengthConverterUse LengthConverter