设置DataTemplate和ControlTemplate映射图钉在WPF中的麻烦

Question

我在设置DataTemplate和ControlTemplate到我的bing地图图钉时遇到麻烦。我正在使用数据绑定，当我尝试通过添加ControlTemplate来自定义我的图钉时，它会起作用。

我代码:

<UserControl x:Class="BingMap.MapUserControl"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:m="clr-namespace:Microsoft.Maps.MapControl.WPF;assembly=Microsoft.Maps.MapControl.WPF" 
         xmlns:ed="http://schemas.microsoft.com/expression/2010/drawing"
         xmlns:viewPushpins="clr-namespace:Program.Map_Control.ViewPushpins">
<UserControl.DataContext>
    <viewPushpins:MapViewPushpins/>
</UserControl.DataContext>
<UserControl.Resources>
    <DataTemplate x:Key="PushpinDataTemplateP">
        <m:Pushpin Location = "{Binding MapLocationP}" ToolTip="{Binding MapTooltipTextP}"/>
    </DataTemplate>
    <ControlTemplate x:Key="PushpinControlTemplateP">
        <Grid>
            <Ellipse Fill="Green" Width="15" Height="15" />
        </Grid>
    </ControlTemplate>
</UserControl.Resources>
<Grid>
    <m:Map  Name="myMap"
            CredentialsProvider="..."
            ZoomLevel="1"
            Center="30,-100"
            Mode="AerialWithLabels"
            MouseLeftButtonUp="Map_Left_Click_Up">
        <m:MapItemsControl
            Template="{StaticResource PushpinControlTemplateP}"
            ItemTemplate="{StaticResource PushpinDataTemplateP}" MouseLeftButtonUp="Map_Left_Click_Up"
            ItemsSource="{Binding  MapLocationsP}"/>
    </m:Map>
</Grid>
</UserControl>

如果我删除这一行，这段代码就可以工作了:

Template="{StaticResource PushpinControlTemplateP}"

但是不要得到我定制的图钉。

我该如何解决这个问题?

Answer 1

通过设置MapItemsControl.Template，您正在为MapItemsControl本身指定模板，而不是为它生成的项指定模板。您可以通过ItemContainerStyle:

间接设置ItemsControl生成的单个项目的模板

<Style x:Key="PushPinStyle">
    <Setter Property="Control.Template">
        <Setter.Value>
            <ControlTemplate>
                <!-- your template goes here -->
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
<m:MapItemsControl ItemContainerStyle="{StaticResource }" ...>

Answer 2

我知道我错在哪里了。正如Kent已经提到的，

行

Template="{StaticResource PushpinControlTemplateP}"

不应该出现在MapItemsControl中

我把这行代码移到参考资料中解决了这个问题，使它们看起来像这样:

<UserControl.Resources>
<ControlTemplate x:Key="PushpinControlTemplateP">
    <Grid>
        <Ellipse Fill="Green" Width="15" Height="15" />
    </Grid>
</ControlTemplate>
<DataTemplate x:Key="PushpinDataTemplateP">
    <m:Pushpin Location = "{Binding MapLocationP}" ToolTip="{Binding MapTooltipTextP}" Template="{StaticResource PushpinControlTemplateP}"/>
</DataTemplate>
</UserControl.Resources>