wpf listbox和datatemplate里面有网格

Question

我有一个问题.我希望能有ListBox与DataTemplate作为Grid.该网格有2列.我想将第一列宽度设置为3*另一列*.这该怎么做？我会复制我的代码.

<ListBox x:Name="commandListbox" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" HorizontalAlignment="Stretch">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="3*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>

                <TextBlock Grid.Column="0" Text="{Binding}"/>
                <TextBlock Grid.Column="1" Text="icon" />
           </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>                
</ListBox>

Answer 1

最好将模板存储在资源中:

<Window.Resources>
  <DataTemplate x:Key="DefaultTemplate">
    <Grid x:Name="GridItem" Width="200">
       <Grid.ColumnDefinitions>
           <ColumnDefinition Width="Auto" />
           <ColumnDefinition Width="Auto" />
       </Grid.ColumnDefinitions>

       <TextBlock x:Name="Parameter" Grid.Column="1" Text="{Binding Path=Name}" Margin="5,1,0,0" />
       <TextBlock x:Name="Value" Grid.Column="2" Text="{Binding Path=Age}" Margin="85,1,0,0" />

       <Line x:Name="Separator" X1="0" X2="0" Y1="0" Y2="20" SnapsToDevicePixels="True" Grid.Column="1" Stroke="Black" StrokeThickness="2" Margin="50,0,0,0" HorizontalAlignment="Left" />
   </Grid>
 </DataTemplate>
</Window.Resources>

ListBox定义:

<ListBox Name="MyListBox" ItemTemplate="{StaticResource DefaultTemplate}" />

在代码C#中:

public class Person
{
  public string Name
  {
    get;
    set;
  }

 public int Age
 {
   get;
   set;
 }
}

定义ObservableCollection:

private ObservableCollection<Person> MyListBoxData = new ObservableCollection<Person>();

并在集合上添加项目:

MyListBoxData.Add(new Person()
{
  Name = "Nick",
  Age = 21,
});

MyListBoxData.Add(new Person()
{
  Name = "Adam",
  Age = 11,
});

MyListBox.ItemsSource = MyListBoxData;

编辑:

然后设置第一个TextBlock的Width ="3*",Width ="*"和Margin =" - WidthGrid":

<Grid x:Name="GridItem" Width="300">
 <Grid.ColumnDefinitions>
  <ColumnDefinition Width="3*" />
  <ColumnDefinition Width="*" />
 </Grid.ColumnDefinitions>

 <TextBlock x:Name="Parameter" Grid.Column="1" Text="{Binding Path=Name}" Margin="-220,0,0,0" />
 <TextBlock x:Name="Value" Grid.Column="2" Text="{Binding Path=Age}" Margin="0,0,0,0" />
</Grid>

Answer 2

使用 IsSharedSizeScope 在生成的网格中共享列大小，用于自动宽度（不能用于 * 大小）：

通过http://wpftutorial.net/DataTemplates.html

<ListBox ItemsSource="{Binding}" BorderBrush="Transparent" 
     Grid.IsSharedSizeScope="True"
     HorizontalContentAlignment="Stretch">
<ListBox.ItemTemplate>
    <DataTemplate>
        <Grid Margin="4">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Key" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <TextBlock Text="{Binding Name}" FontWeight="Bold"  />
            <TextBox Grid.Column="1" Text="{Binding Value }" />
        </Grid>
    </DataTemplate>
</ListBox.ItemTemplate>

见 MSDN 备注

参与大小共享的列和行不遵循 Star 大小。在这种情况下，Star sizing 被视为 Auto。如果 IsSharedSizeScope 在资源模板中设置为 true，并且在该模板之外定义了 SharedSizeGroup，则网格大小共享不起作用。