Binding/Referencing Method to XAML WPF
binding, c#, events, wpf, xaml
Solution
Well you can do that by attaching code behind to your ResourceDictionary. Few simple steps to achieve that are:
- Say ResourceDictionary file name is `CustomResources.xaml`. Add another file in same directory besides your ResourceDictionary with name `CustomResources.xaml.cs`. Create `partial class CustomResources` inheriting from ResourceDictionary.
Declare your handler for MouseEnter and code behind is ready.
using System;
using System.Windows;
namespace WpfApplication1
{
public partial class CustomResources : ResourceDictionary
{
public void MouseEnter(object sender, EventArgs e)
{
MessageBox.Show("Test");
}
}
}
- Now, in XAML set `x:Class` attribute and set handler to `MouseEnter`.
XAML :
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="WpfApplication1.CustomResources"
xmlns:local="clr-namespace:WpfApplication1">
<ControlTemplate x:Key="TitledWindowControlTemplateKey"
x:Name="PART_ControlTemplate"
TargetType="{x:Type local:TitleWindow}">
<Rectangle>
<Rectangle.Style>
<Style TargetType="Rectangle">
<EventSetter Event="Mouse.MouseEnter" Handler="MouseEnter"/>
</Style>
</Rectangle.Style>
</Rectangle>
</ControlTemplate>
</ResourceDictionary>
Problem
I have this xaml ``` <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:l="clr-namespace:My.Windows" > <ObjectDataProvider x:Key="TitledWindow_Test" MethodName="Test" ObjectInstance={x:Type l:TitledWindow}"> <ControlTemplate x:Key="TitledWindowControlTemplateKey" x:Name="PART_ControlTemplate" TargetType="{x:Type l:TitledWindow}" <Rectangle> <Rectangle.Style> <EventSetter Event="Mouse.MouseEnter" Handler="{StaticResource TitledWindow_Test}"> </Rectangle.Style> </Rectangle> </ControlTemplate> </ResourceDictionary> ``` And my c# code: ``` namespace My.Windows { public partial class TitledWindow : Window { public void Test() { MessageBox.Show("Test"); } } } ``` The problem is that i get the following error: Error 1 'ResourceDictionary' root element requires a x:Class attribute to support event handlers in the XAML file. Either remove the event handler for the MouseEnter event, or add a x:Class attribute to the root element.