如何在 DataGrid 列标题上设置 DataContext [英] How to set the DataContext on a DataGrid Column Header

问题描述

在我的 Silverlight 3 用户控件中，我展示了一个基本的 DataGrid 控件.我需要以编程方式生成列，如下所示:

In my Silverlight 3 user control I am showing a basic DataGrid control. I need to generate the columns programmatically as follows:

Style headerStyle = (Style)Resources["ColumnHeaderStyle"];
DataGridTextColumn col = new DataGridTextColumn();
col.HeaderStyle = headerStyle;
dataGrid.Columns.Add(col);

样式定义如下:

<Style x:Name="ColumnStyle" x:Key="ColumnHeaderStyle" 
       TargetType="prim:DataGridColumnHeader">
    <Setter Property="ContentTemplate">
        <Setter.Value>
            <DataTemplate>
                <StackPanel Loaded="StackPanel_Loaded">
                    <TextBlock Text="{Binding Name}" />
                    <TextBlock Text="{Binding Data}" />
                </StackPanel>
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>

我想将标头的数据上下文设置为标头"对象(具有在 DataTemplate 中引用的名称"和数据"属性).不幸的是，我不能按照其他地方的建议使用 StackPanel_Loaded 事件，因为该事件处理程序也会在用户开始列拖放操作时调用.

I want to set the data context of the header to a "header" object (with "Name" and "Data" properties which are referenced in the DataTemplate). Unfortunately, I cannot use the StackPanel_Loaded event as suggested elsewhere, because the event handler is also called when the user starts a column drag&drop operation.

设置 DataGrid 列标题的 DataContext 的正确方法是什么?

What is the correct way of setting the DataContext of a DataGrid column header?

推荐答案

原来可以使用 Header 属性(属于 Object 类型)作为 DataTemplate 的 DataContext(如上图设置):

Turns out that one can use the Header property (which is of type Object) as the DataContext for the DataTemplate (set as shown above):

Style headerStyle = (Style)Resources["ColumnHeaderStyle"];
DataGridTextColumn col = new DataGridTextColumn();
col.HeaderStyle = headerStyle;
col.Header = myHeaderDataContext; // DataContext for ColumnHeaderStyle
dataGrid.Columns.Add(col);

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