DataGridColumn.IsFrozen 属性

定义

命名空间:

System.Windows.Controls

程序集:

PresentationFramework.dll

获取一个值，该值指示是否阻止列水平滚动。

public:
 property bool IsFrozen { bool get(); };

public bool IsFrozen { get; }

member this.IsFrozen : bool

Public ReadOnly Property IsFrozen As Boolean

属性值

Boolean

如果列无法水平滚动，则为 true；否则为 false。 已注册的默认值为 false。 有关可能影响该值的因素的信息，请参见 DependencyProperty。

示例

以下示例演示如何在从 ContextMenu中选择“冻结列”时冻结列。 列移动到左侧，以便包含在冻结列中。

<!--Defines the handlers for when the FreezeColumnCommand is executed-->
<Window.CommandBindings>
    <CommandBinding Command="{x:Static local:Window1.FreezeColumnCommand}" Executed="CommandBinding_Executed" />
</Window.CommandBindings>
<!--Defines the context menu for the ColumnHeaders and attaches the FreezeColumnCommand-->
<Window.Resources>
    <ContextMenu x:Key="ColumnHeaderMenu" IsEnabled="True"  >
        <MenuItem Header="Freeze Column" IsEnabled="True" Command="{x:Static local:Window1.FreezeColumnCommand}"
                  CommandTarget="{Binding RelativeSource={RelativeSource AncestorType=Popup}, Path=PlacementTarget}" 
                  CommandParameter="{Binding ElementName=DG1, Path=CurrentColumn.DisplayIndex}" />
    </ContextMenu>
</Window.Resources>

<Grid>
    <!--Creates a new DataGrid with a context menu for the column headers-->
    <DataGrid Name="DG1" ItemsSource="{Binding}"  >
        <DataGrid.ColumnHeaderStyle >
            <Style TargetType="DataGridColumnHeader">
                <Setter Property="ContextMenu" Value="{StaticResource ColumnHeaderMenu}" />
            </Style>
        </DataGrid.ColumnHeaderStyle>
    </DataGrid>
</Grid>

public partial class Window1 : Window
{
    
    public static RoutedUICommand FreezeColumnCommand = new RoutedUICommand();

    public Window1()
    {
        InitializeComponent();
        //GetData connects to the database and returns the data in a table.
        AdventureWorksLT2008DataSet.SalesOrderDetailDataTable dt = GetData();

        DG1.DataContext = dt;
    }

Class Window1
    Public Shared FreezeColumnCommand As New RoutedUICommand()

    Public Sub New()
        InitializeComponent()

        'GetData connects to the database and returns the data in a table.
        Dim dt As AdventureWorksLT2008DataSet.SalesOrderDetailDataTable = GetData()

        DG1.DataContext = dt
    End Sub

    private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
    {
       //Get the column header that started the command and move that column left to freeze it.
       System.Windows.Controls.Primitives.DataGridColumnHeader header = (System.Windows.Controls.Primitives.DataGridColumnHeader)e.OriginalSource;
       if (header.Column.IsFrozen ==true)
       {
           return;
       }
       else
       {
           header.Column.DisplayIndex = DG1.FrozenColumnCount;
           DG1.FrozenColumnCount++;
       }
    }
}

Private Sub CommandBinding_Executed(ByVal sender As Object, ByVal e As ExecutedRoutedEventArgs)
    'Get the column header that started the command and move that column left to freeze it.
    Dim header As System.Windows.Controls.Primitives.DataGridColumnHeader = DirectCast(e.OriginalSource, System.Windows.Controls.Primitives.DataGridColumnHeader)
    If header.Column.IsFrozen = True Then
        Exit Sub
    Else
        header.Column.DisplayIndex = DG1.FrozenColumnCount
        DG1.FrozenColumnCount += 1


    End If
End Sub

注解

IsFrozen 不能用于冻结列。 请改为设置 FrozenColumnCount 属性。 数字指定的 FrozenColumnCount 列的最左侧列将就地冻结。

另请参阅

• DataGrid
• FrozenColumnCount