Bind to a Method : Binding « Windows Presentation Foundation « C# / CSharp Tutorial

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C# / CSharp Tutorial » Windows Presentation Foundation » Binding 
24.129.28.Bind to a Method
<Window 
    x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:system="clr-namespace:System;assembly=mscorlib"
  xmlns:WpfApplication1="clr-namespace:WpfApplication1"
    Title="WPF"  Width="240" Height="150" >
    <Window.Resources>
        <WpfApplication1:DoubleToString x:Key="doubleToString" />
        <ObjectDataProvider x:Key="convertDistance"
            ObjectType="{x:Type WpfApplication1:DistanceConverter }"
            MethodName="Convert" >
            <ObjectDataProvider.MethodParameters>
                <system:Double>0</system:Double>
                <WpfApplication1:DistanceType>Miles</WpfApplication1:DistanceType>
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>

    </Window.Resources>
    <StackPanel>
        <TextBlock Text="Enter a distance to convert:"/>
        <TextBox Text ="{Binding Source={StaticResource convertDistance},
                    Path=MethodParameters[0],BindsDirectlyToSource=true,UpdateSourceTrigger=PropertyChanged,
                    Converter={StaticResource doubleToString}}"/>
        
        <ComboBox Width="80" HorizontalAlignment="Left"
            SelectedValue="{Binding Source={StaticResource convertDistance},Path=MethodParameters[1], 
                            BindsDirectlyToSource=true}" >
            <WpfApplication1:DistanceType>Miles</WpfApplication1:DistanceType>
            <WpfApplication1:DistanceType>Kilometres</WpfApplication1:DistanceType>
        </ComboBox>

        <TextBlock Text="Result:"/>
        <TextBlock Text="{Binding Source={StaticResource convertDistance}}"/>
    </StackPanel>
</Window>


//File:Window.xaml.cs

using System;
using System.Windows.Data;

namespace WpfApplication1
{
    public class DoubleToString : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter,System.Globalization.CultureInfo culture)
        {
            if(value != null)
            {
                return value.ToString();
            }
            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter,System.Globalization.CultureInfo culture)
        {
            string strValue = value as string;
            if(strValue != null)
            {
                double result;
                bool converted = Double.TryParse(strValue, out result);
                if(converted)
                {
                    return result;
                }
            }
            return null;
        }
    }


    public enum DistanceType
    {
        Miles,
        Kilometres
    }

    public class DistanceConverter
    {
        public string Convert(double amount, DistanceType distancetype)
        {
            if(distancetype == DistanceType.Miles)
                return (amount * 1.6).ToString("0.##"" km";

            if(distancetype == DistanceType.Kilometres)
                return (amount * 0.6).ToString("0.##"" m";

            throw new ArgumentOutOfRangeException("distanceType");
        }
    }
}
WPF Bind To A Method
24.129.Binding
24.129.1.Bind to Window itselfBind to Window itself
24.129.2.Two level path bindingTwo level path binding
24.129.3.Bind RelativeSource's AncestorTypeBind RelativeSource's AncestorType
24.129.4.Bind RelativeSource's AncestorType's PathBind RelativeSource's AncestorType's Path
24.129.5.Bind Stroke Thickness to SliderBind Stroke Thickness to Slider
24.129.6.Desktop to ControlDesktop to Control
24.129.7.Binding With Data ContextBinding With Data Context
24.129.8.Long Binding PathLong Binding Path
24.129.9.Bind ListBox ItemsSource to DayNames property of DateTimeFormatInfoBind ListBox ItemsSource to DayNames property of DateTimeFormatInfo
24.129.10.Bind TextBlock Text to SelectedItem property of ListBoxBind TextBlock Text to SelectedItem property of ListBox
24.129.11.Binding FontFamily / FontSize value for current ControlBinding FontFamily / FontSize value for current Control
24.129.12.Bind to IDataErrorInfoBind to IDataErrorInfo
24.129.13.DataTemplate for bindingDataTemplate for binding
24.129.14.Binding Environment InfoBinding Environment Info
24.129.15.Bind to an ADO.NETDataSetBind to an ADO.NETDataSet
24.129.16.Add a value converter to a binding using XAMLAdd a value converter to a binding using XAML
24.129.17.Custom Dialog with data bindingCustom Dialog with data binding
24.129.18.One way and two way bindingOne way and two way binding
24.129.19.Object BindingObject Binding
24.129.20.Without BindingWithout Binding
24.129.21.Master Detail BindingMaster Detail Binding
24.129.22.Data binding using collections composed of mixed types of data.Data binding using collections composed of mixed types of data.
24.129.23.List BindingList Binding
24.129.24.Async bindingAsync binding
24.129.25.Hierarchical Binding for three level nested objectsHierarchical Binding for three level nested objects
24.129.26.BindingOperations.GetBindingExpressionBindingOperations.GetBindingExpression
24.129.27.Bind to enum typesBind to enum types
24.129.28.Bind to a MethodBind to a Method
24.129.29.Bind an ItemsControl to the CollectionViewSource, Set its DisplayMemberPath to display the Name propertyBind an ItemsControl to the CollectionViewSource, Set its DisplayMemberPath to display the Name property
24.129.30.Bind to the Values of an EnumerationBind to the Values of an Enumeration
24.129.31.Bind to an Existing Object InstanceBind to an Existing Object Instance
24.129.32.Digital ClockDigital Clock
24.129.33.Formatted Digital ClockFormatted Digital Clock
24.129.34.Manual Update TargetManual Update Target
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