Control Template

sieuthi · #1 (**permalink**) April 22nd, 2012, 01:54 PM

Help me.
When i run this code:

PHP Code:


			
<Style x:Key="ImageButton" TargetType="Button">

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate>

                        <StackPanel Height="{TemplateBinding Height}" Width="{TemplateBinding Width}">

                            <Image Height="100" Width="100" Source="wrox.png" />

                            <TextBlock Text="{TemplateBinding Content}" />

                        </StackPanel>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

is this error appear

PHP Code:


			
private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)

        {

            if (System.Diagnostics.Debugger.IsAttached)

            {

                // An unhandled exception has occurred; break into the debugger

                System.Diagnostics.Debugger.Break();

            }

        }

And when i remove this line: <TextBlock Text="{TemplateBinding Content}" />
program can run

mcbain · #2 (**permalink**) April 30th, 2012, 06:35 AM

hi there,
I also get the same error.. I also get a related error when you do the next tutorial regarding the Control Templates and applying custome Visual States.

Within the

PHP Code:


			
                        <Grid>
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonButtonStates">
                                    <VisualState x:Name="Normal" />
                                    <VisualState x:Name="Pressed" >
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Duration="0" 
Storyboard.TargetName="MainBorder" Storyboard.TargetProperty="BorderBrush">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Disabled" />
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Border Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" 
BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
                                <StackPanel>
                                    <Image Source="Images\wrox.png" Width="200" Height="300" />
                                    <TextBlock  TextAlignment="Center" />
                                </StackPanel>
                            </Border>
                        </Grid>
                    </ControlTemplate>

when you add a button and use this template there is an exception thrown when you click the button

+ _exception {"Cannot resolve TargetName MainBorder."} System.Exception {System.InvalidOperationException}

If anyone else knows how / why this is occurring it would be great to know so I can continue with the exercises. Also maybe needed for future revisions of the book..

to the OP I am also asking via stack overflow so if I get an answer I'll post a link here, could you do the same as well if you figure it out?

Thanks

mcbain · #3 (**permalink**) April 30th, 2012, 06:52 AM

here is part of the answer
http://stackoverflow.com/questions/1...nown-exception

mcbain · #4 (**permalink**) May 2nd, 2012, 05:53 AM

Found out the error.. Check out
Code Examples - Chapter 4 - Using Control Templates

Need to download code?

Navigation