wpf 如何在代码中绑定GridViewColumn的DisplayMemberBinding

How to bind GridViewColumn's DisplayMemberBinding in code

提问by Walt Lounsbury

I have a MultiColumn TreeView which uses a GridViewColumnCollection. I my situation, I don't know how many columns will be there, nor their header names. That's discovery at run time.

我有一个使用 GridViewColumnCollection 的 MultiColumn TreeView。我的情况，我不知道会有多少列，也不知道它们的标题名称。这就是运行时的发现。

Hence I have need to create these columns in code and bind dynamically to them.

因此，我需要在代码中创建这些列并动态绑定到它们。

Okay - creation is simple enough:

好的 - 创建很简单：

GridViewColumn c = new GridViewColumn();
c.Header = "Next Column";
myTree.Columns.Add(c);

Now where I stumble - Suppose I wish to bind to my viewModel's "MyName" property:

现在我绊倒了 - 假设我希望绑定到我的 viewModel 的“MyName”属性：

Binding myBinding = new Binding(??);
myBinding.Source = ??
BindingOperations.SetBinding(myTree,GridViewColumn.????  , myBinding);

Now the template for this

现在这个模板

 <DataTemplate x:Key="CellTemplate_Name">
        <DockPanel>
            <ToggleButton x:Name="Expander"
                          Margin="{Binding Level,
                                           Converter={StaticResource LevelToIndentConverter},
                                           RelativeSource={RelativeSource AncestorType={x:Type l:TreeListViewItem}}}"
                          ClickMode="Press"
                          IsChecked="{Binding Path=IsExpanded,
                                              RelativeSource={RelativeSource AncestorType={x:Type l:TreeListViewItem}}}"
                          Style="{StaticResource ExpandCollapseToggleStyle}" />
            <TextBlock Text="{Binding Name}" />
.                
.
.
    <Style TargetType="{x:Type l:TreeListViewItem}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type l:TreeListViewItem}">
                    <StackPanel>
                        <Border Name="Bd"
                                Background="{TemplateBinding Background}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}"
                                Padding="{TemplateBinding Padding}">
                            <GridViewRowPresenter x:Name="PART_Header"
                                                  Columns="{Binding Path=Columns,
                                                                    RelativeSource={RelativeSource AncestorType={x:Type l:TreeListView}}}"
                                                  Content="{TemplateBinding Header}" />
                        </Border>
                        <ItemsPresenter x:Name="ItemsHost" />
                    </StackPanel>

Where column insertion and binding in XAML appears as:

XAML 中的列插入和绑定显示为：

    <l:TreeListView x:Name="myTree" ItemsSource="{Binding MySource}">
    <l:TreeListView.Columns>
        <GridViewColumn x:Name="GridViewColumn0" CellTemplate="{StaticResource CellTemplate_Name}" 
                        Header="Name" />
        <GridViewColumn Width="60"
                        DisplayMemberBinding="{Binding Description}"
                        Header="Description" />

Any help with SetBinding here would be greatly appreciated. I've searched till my fingers fell off.

任何有关 SetBinding 的帮助将不胜感激。我一直在寻找，直到我的手指掉下来。

Update: Excellent answer:

更新：优秀的答案：

        GridViewColumn c = new GridViewColumn();
        c.Header = "Next Column";
        myTree.Columns.Add(c);

        Binding myBinding = new Binding("MyName"); 
        myBinding.Source = viewModel;
        BindingOperations.SetBinding(myTree.Columns[myTree.Columns.Count - 1], 
            GridViewColumn.HeaderProperty, 
            myBinding);

The binding now works against the Header perfectly - thank you so much.

绑定现在可以完美地对抗标题 - 非常感谢。

回答by Vlad

(Extracting an answer from comments:)

（从评论中提取答案：）

You can set the binding manually with the code like this:

您可以使用如下代码手动设置绑定：

Binding myBinding = new Binding("MyName");
myBinding.Source = viewModel;
BindingOperations.SetBinding(myTree.Columns[i], GridViewColumn.HeaderProperty, myBinding);

where iis the number of column.

其中i是列数。

For setting the DisplayMemberBinding, a simpler code can be used:

要设置DisplayMemberBinding，可以使用更简单的代码：

Binding descriptionBinding = new Binding("Description");
myTree.Columns[i].DisplayMemberBinding = descriptionBinding;

回答by yu yang Jian

I make it a method NewGridViewColumn, set the parameter headerand bindingNameto the method, and you will get a binding-completed GridViewColumn:

我把它变成一个方法NewGridViewColumn，设置参数header和bindingName方法，你会得到一个绑定完成的 GridViewColumn：

    private GridViewColumn NewGridViewColumn(string header, string bindingName)
    {
        GridViewColumn gvc = new GridViewColumn();
        gvc.Header = header;
        gvc.DisplayMemberBinding = new Binding(bindingName);            
        return gvc;
    }

.

.

Then in case of ListView xaml like this:

然后在 ListView xaml 这样的情况下：

<Grid>
        <ListView Margin="5" Name="ListViewTest"></ListView>
</Grid>

You can easily add the GridViewColumn to ListView in Constructor using NewGridViewColumn:

您可以使用以下方法轻松地将 GridViewColumn 添加到构造函数中的 ListView NewGridViewColumn：

    public MainWindow()
    {
        InitializeComponent();

        //Give the Source to ListViewTest
        //ProduceNames() makes a List<NameClass> that 
        //NameClass has 3 property Name1,Name2,Nmae3
        ListViewTest.ItemsSource = ProduceNames();

        GridView gview = new GridView();

        //add some GridViewColumns to the gview
        gview.Columns.Add(NewGridViewColumn("FirstName","Name1"));
        gview.Columns.Add(NewGridViewColumn("SecondName","Name2"));
        gview.Columns.Add(NewGridViewColumn("ThirdName","Name3"));

        //set the gview to the ListViewTest's View
        ListViewTest.View = gview;

    }

the result:

结果：