在多个GridViewColumns使用的通用的DataTemplate [英] Generic DataTemplate used in multiple GridViewColumns

问题描述

我有一个显示一些值的GridView：

 ＆LT; ListView控件的ItemsSource ={结合MyDataSource}＆GT;
    ＆LT; ListView.View＆GT;
        ＆LT;＆GridView的GT;
            ＆LT; GridViewColumn标题=日期1DisplayMemberBinding ={结合日期1}/＆GT;
            ＆LT; GridViewColumn标题=日期2DisplayMemberBinding ={结合日期2}/＆GT;
            ...等栏目，不一定包含日期...
        ＆LT; / GridView的＆GT;
    ＆LT; /ListView.View>
＆LT; /＆的ListView GT;
 

这工作正常。现在，我想创建一个格式化日期以特定的方式数据模板：

 ＆LT;的DataTemplate X：键=MySpecialDate＆GT;
    ＆LT; TextBlock的文本={绑定的StringFormat = {} {0：YYYY.MM.DD}}/＆GT;
＆LT; / DataTemplate中＆GT;
 

添加指定 CellTemplate 将无法工作，只要 DisplayMemberBinding 。因此，我不得不删除 DisplayMemberBinding 属性：

 ＆LT; GridViewColumn标题=日期1CellTemplate ={StaticResource的MySpecialDate}/＆GT;
＆LT; GridViewColumn标题=日期2CellTemplate ={StaticResource的MySpecialDate}/＆GT;
 

这里的问题：现在 DisplayMemberBinding 走了，我怎么告诉GridView控件中显示的财产？ GridViewColumn 不具有的DataContext 属性。

当然，我可以把属性的名称（日期1 RESP。日期2 ）插入到DataTemplate中，但我需要一个模板每个属性，而且会破坏其整个目的的模板的

 ＆LT;！ - 我不希望出现这种情况 - ＆GT;
＆LT;的DataTemplate X：键=MySpecialDate1＆GT;
    ＆LT; TextBlock的文本={结合日期1，的StringFormat = {} {0：YYYY.MM.DD}}/＆GT;
＆LT; / DataTemplate中＆GT;
＆LT;的DataTemplate X：键=MySpecialDate2＆GT;
    ＆LT; TextBlock的文本={结合日期2，的StringFormat = {} {0：YYYY.MM.DD}}/＆GT;
＆LT; / DataTemplate中＆GT;
 




解决方案

有关你的问题都是我的传递多个资源投入到一个DataTemplate ，我终于找到了一个解决方案。
我觉得你可以不在身边每一个这样的日期模板的定义得到。但是，这取决于你的显示模板的复杂性，这种解决方案保持了额外的的DataTemplate 取值code到最低限度：

 ＆LT;的DataTemplate X：键=德恩＆GT;
  ＆lt;内容presenter的ContentTemplate ={StaticResource的MySpecialDate}地方：YourClass.AttachedDate =德恩/＆GT;
＆LT; / DataTemplate中＆GT;
 

这些额外的的DataTemplate 的使用附加属性然后可以通过在的DataTemplate MySpecialDate转换器中使用。
附加的属性在code被定义后面。这个问题的答案我自己的问题包含完整的例子。

I have a GridView that displays some values:

<ListView ItemsSource="{Binding MyDataSource}">
    <ListView.View>
        <GridView>
            <GridViewColumn Header="Date1" DisplayMemberBinding="{Binding Date1}" />
            <GridViewColumn Header="Date2" DisplayMemberBinding="{Binding Date2}" />
            ...other Columns, not necessarily containing dates...
        </GridView>
    </ListView.View>
</ListView>

This works fine. Now I want to create a data template that formats a date in a specific way:

<DataTemplate x:Key="MySpecialDate">
    <TextBlock Text="{Binding StringFormat={}{0:yyyy.MM.dd}}" />
</DataTemplate>

Adding CellTemplate won't work as long as DisplayMemberBinding is specified. Thus, I have to remove the DisplayMemberBinding attribute:

<GridViewColumn Header="Date1" CellTemplate="{StaticResource MySpecialDate}" />
<GridViewColumn Header="Date2" CellTemplate="{StaticResource MySpecialDate}" />

Here's the question: Now that DisplayMemberBinding is gone, how do I tell the GridView which property to display? GridViewColumn does not have a DataContext property.

Of course, I could put the name of the property (Date1 resp. Date2) into the DataTemplate, but then I would need one template for each property and that would defeat the whole purpose of having a template.

<!-- I don't want that -->
<DataTemplate x:Key="MySpecialDate1">
    <TextBlock Text="{Binding Date1, StringFormat={}{0:yyyy.MM.dd}}" />
</DataTemplate>
<DataTemplate x:Key="MySpecialDate2">
    <TextBlock Text="{Binding Date2, StringFormat={}{0:yyyy.MM.dd}}" />
</DataTemplate>

解决方案

Related to your question is mine: Pass multiple resources into a DataTemplate which I finally found a solution for. I think you cannot get around the definition of a template for every such date. But depending on the complexity of your display template this solution keeps the additional DataTemplates code to a minimum:

<DataTemplate x:Key="DateX">
  <ContentPresenter ContentTemplate="{StaticResource MySpecialDate}" local:YourClass.AttachedDate="DateX"/>
</DataTemplate>

These additional DataTemplates use an attached property which can then be used by a converter in the DataTemplate "MySpecialDate". The attached property has to be defined in the code behind. The answer to my own question contains a complete example.

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