我在實現的「Silverlight模板控件」的ControlTemplate中訪問圖像時遇到問題。我的控制稱爲「ControlDragger」的作風是:加載Silverlight ControlTemplate中的圖像時出現問題
<!-- ControlDragger Menu button style -->
<Style x:Key="MenuButtonStyle" TargetType="Button">
<Setter Property="Margin" Value="5,0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid>
<ContentPresenter HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- ControlDragger -->
<Style TargetType="core:ControlDragger">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="core:ControlDragger">
<Border x:Name="ControlDraggerRoot"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
VerticalAlignment="{TemplateBinding VerticalAlignment}"
MinHeight="{TemplateBinding MinHeight}"
MinWidth="{TemplateBinding MinWidth}"
MaxHeight="{TemplateBinding MaxHeight}"
MaxWidth="{TemplateBinding MaxWidth}"
Height="{TemplateBinding Height}"
Width="{TemplateBinding Width}">
<Grid Background="Transparent">
<Border HorizontalAlignment="Stretch" VerticalAlignment="Stretch" BorderBrush="#DBDBDB" BorderThickness="1" >
<Border.Background>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Color="#F7F7F7" Offset="0" />
<GradientStop Color="#FDFDFD" Offset="1" />
</LinearGradientBrush>
</Border.Background>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="36" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<!-- Title bar plus drag start -->
<Border x:Name="DragStartElement" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" BorderThickness="0"
Background="Transparent">
<TextBlock x:Name="Headline" FontSize="14" Margin="14,5,0,0" />
</Border>
<!-- Clickable icons -->
<Border Grid.Column="1" HorizontalAlignment="Right" VerticalAlignment="Top" Height="26" CornerRadius="13" Margin="0,5,5,0"
BorderThickness="1" BorderBrush="#9EA9B3">
<Border.Background>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Color="#EDECEE" Offset="0" />
<GradientStop Color="#FBFBFC" Offset="1" />
</LinearGradientBrush>
</Border.Background>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="5,0">
<Button x:Name="AddIcon" Style="{StaticResource MenuButtonStyle}">
<Image Source="Icon_small_add.png" Stretch="None" />
<!--
<TextBlock Text="A" />
-->
</Button>
<Button x:Name="DeleteIcon" Style="{StaticResource MenuButtonStyle}">
<TextBlock Text="D" />
<!--
<Image Source="Icon_small_delete.png" Stretch="None" />
-->
</Button>
</StackPanel>
</Border>
<!-- Content holder -->
<Border Grid.Row="1" Grid.ColumnSpan="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="14,0,14,9">
<ContentPresenter/>
</Border>
</Grid>
</Border>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
此模板包含添加和刪除按鈕,其被重新風格爲好。一旦我將TextBlock作爲按鈕的內容,TextBlock就會顯示出來。如果我用圖像替換TextBlock,那麼內容就會消失。這些圖像與包含發佈的XAML的「Generic.xaml」位於相同的文件夾中。我在同一個文件夾中有其他png文件,我可以在其他XAML文件中訪問它們,這些文件也位於ControlTemplate外部的相同文件夾中(在UserControl中)並且它們可以工作。
這裏是我試過到目前爲止的事情來解決這個問題,沒有工作之一:
1)複製圖像到同一文件夾中的實現,其中ControlDragger.cs是
2 )通過「OnApplyTemplate」中的名稱訪問按鈕,並嘗試通過代碼設置圖像
3)加載一個替代png文件以確保使用的png文件沒有損壞。
我也試圖從互聯網上使用Source =「http:// ...」訪問一個隨機圖像,這工作。出於調試的原因,我還在圖片上實現了ImageFailed事件並將其附加到「OnApplyTemplate」中。事實上,它加載失敗,但事件參數不告訴我爲什麼它沒有加載。如果我錯過了什麼,有沒有人有想法?