我对自定义控件及其模板有疑问。
我有一个扩展 Button 的控件,它的模板是通过 Expression Blend 4 创建的,它在 App.xaml 的资源中可用。
这是模板:
<ControlTemplate x:Key="ImageButtonControlTemplate1" TargetType="maquette_v0__1_Controles_persos:ImageButton">
<Grid Margin="0" Width="150">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled"/>
<VisualState x:Name="Normal">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="image">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="MouseOver"/>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="image1">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Image x:Name="image1" Source="{TemplateBinding Image}" Height="150"/>
<Image x:Name="image" Source="{TemplateBinding PressedImage}" Height="150"/>
</Grid>
</ControlTemplate>
在一个页面中,我想动态添加一个自定义控件。为此,我的文件 Xaml“menu_commune”中有一个网格,我想在这个网格中显示我的控件。
这是代码 C#:
ImageButton b = new ImageButton();
b.SetValue(Grid.RowProperty, 0);
b.SetValue(Grid.ColumnProperty, 2);
// bool t = Application.Current.Resources["ImageButtonControlTemplate1"] == null;
ControlTemplate ctemp = (ControlTemplate) Application.Current.Resources["ImageButtonControlTemplate1"];
b.Template = ctemp;
BitmapImage bi_noPress = new BitmapImage(new Uri("/Images/menu_agenda.png"));
BitmapImage bi_Press = new BitmapImage(new Uri("/Images/menu_agenda_selected.png"));
b.Image = bi_noPress;
b.PressedImage = bi_Press;
menu_commune.Children.Add(b);
问题是什么都没有显示。但是,Xaml 中的声明运行良好。
<UC:ImageButton Grid.Row="2" Grid.Column="2" Image="../Images/menu_office-de-tourisme.png" PressedImage="../Images/menu_office-de-tourisme_selected.png" Height="150" Template="{StaticResource ImageButtonControlTemplate1}" Click="tourisme_Click" />
谢谢