Question

我遇到有关GridSplitter可见性的问题。

在此，无论我托管Winform DataGridView。拖动时GridTelitter在其他控件上可正确显示。但不是在这个网格上。实际上，无论我托管而不是Datagridview，它都会成为最顶层的控件，这会让GridSplitter隐藏在它背后。

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Name="rowForButton"/>
        <RowDefinition Name="rowForGridSplitter" Height="Auto" MinHeight="81" />
    </Grid.RowDefinitions>
    <Button Grid.Row="0" Height="50" Width="110" Content="Button in First Row"/>
    <my:WindowsFormsHost Panel.ZIndex="0" Grid.Row="1"  Margin="30,11,138,0" x:Name="winHost" Height="58" VerticalAlignment="Top" OpacityMask="Transparent">            
        <win:DataGridView x:Name="dataGridView"></win:DataGridView>
    </my:WindowsFormsHost>        
    <GridSplitter  BorderThickness="1" Panel.ZIndex="1" Grid.Row="1" HorizontalAlignment="Stretch" Height="5" ShowsPreview="True" VerticalAlignment="Top">
    </GridSplitter>
</Grid>

Answer 1

通常，您应该将GridSplitter放入其自己的网格单元格中，或者确保通过边距不会使控件与其重叠。但我不知道这是否适用于你。另请参阅here。

Answer 2

我也遇到了这个问题，有我的解决方案：

var splitter = new GridSplitter()
        {
            HorizontalAlignment = HorizontalAlignment.Stretch,
            VerticalAlignment = VerticalAlignment.Stretch,
            FocusVisualStyle = null,
            ShowsPreview = true,
            Background = new SolidColorBrush(new Color() { R = 1, G = 1, B = 1, A = 1 }),
        };

// non-style / essential window which will display over your WinForm control
var PopupWindowForSplitter = new PopupWindow()
        {
            Background = new SolidColorBrush(new Color() { R = 1, G = 1, B = 1, A = 1 }),
            Visibility = Visibility.Collapsed
        };
PopupWindowForSplitter.Show();
...

Point _ptForSplitterDrag = new Point(0,0);

splitter.DragStarted += (o, e) =>
        {
            var pt = splitter.PointToScreen(new Point());
            _ptForSplitterDrag = splitter.PointToScreen(Mouse.GetPosition(splitter));
            PopupWindowForSplitter.Left = pt.X;
            PopupWindowForSplitter.Top = pt.Y;
            PopupWindowForSplitter.Height = splitter.ActualHeight;
            PopupWindowForSplitter.Width = splitter.ActualWidth;
            PopupWindowForSplitter.Activate();
            PopupWindowForSplitter.Visibility = Visibility.Visible;
        };
        splitter.DragDelta += (o, e) =>
        {
            var pt = splitter.PointToScreen(Mouse.GetPosition(splitter)) - _ptForSplitterDrag
                + splitter.PointToScreen(new Point());
            if (splitter.ResizeDirection == GridResizeDirection.Rows)
            {
                PopupWindowForSplitter.Top = pt.Y;
            }
            else
            {
                PopupWindowForSplitter.Left = pt.X;
            }
        };
        splitter.DragCompleted += (o, e) =>
        {
            var initializeData = typeof(GridSplitter).GetMethod("InitializeData", BindingFlags.NonPublic | BindingFlags.Instance);
            var moveSplitter = typeof(GridSplitter).GetMethod("MoveSplitter", BindingFlags.NonPublic | BindingFlags.Instance);
            if (moveSplitter != null && initializeData != null)
            {
                initializeData.Invoke(splitter, new object[] { true });

                var pt = splitter.PointToScreen(Mouse.GetPosition(splitter)) - _ptForSplitterDrag;
                if (splitter.ResizeDirection == GridResizeDirection.Rows)
                {
                    moveSplitter.Invoke(splitter, new object[] { 0, pt.Y });
                }
                else
                {
                    moveSplitter.Invoke(splitter, new object[] { pt.X, 0 });
                }
            }
            PopupWindowForSplitter.Visibility = Visibility.Collapsed;
        };

由于英语不好，我的描述中可能存在一些问题，但我认为代码足以解释它。

Answer 3

尝试使用WPF本机DataGrid控件。您可以购买几个商业第三方控件，或者您可以查看Microsoft提供的控件（目前仍在CTP中）：

Answer 4

Windows窗体控件始终与WPF控件分开呈现，因此将始终显示在WPF应用程序上。

有关详细信息，请参阅Hosting a Microsoft Win32 Window in WPF（小标题输出行为中的显着差异）。

Answer 5

在您的情况下，最快的解决方法是使用Button将GirdSplitter移动到Row：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Name="rowForButton"/>
        <RowDefinition Name="rowForGridSplitter" Height="Auto" MinHeight="81" />
    </Grid.RowDefinitions>
    <Button Grid.Row="0" Height="50" Width="110" Content="Button in First Row"/>
    <my:WindowsFormsHost Panel.ZIndex="0" Grid.Row="1"  Margin="30,11,138,0" x:Name="winHost" Height="58" VerticalAlignment="Top" OpacityMask="Transparent">            
        <win:DataGridView x:Name="dataGridView"></win:DataGridView>
    </my:WindowsFormsHost>        
    <GridSplitter  BorderThickness="1" Panel.ZIndex="1" Grid.Row="0" HorizontalAlignment="Stretch" Height="5" ShowsPreview="True" VerticalAlignment="Bottom">
    </GridSplitter>
</Grid>

现在只需调整边距以确保按钮和网格分割器之间有一些空间。

Answer 6

解决方案是在网格分割器中添加一个“Windows窗体”标签，并在添加DataGridView后以编程方式执行此操作，使其显示在其上方，如下所示：

void AddLabelToSplitter()
{
string template =
    @" <ControlTemplate 
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:mn='clr-namespace:MyNameSpace;assembly=MyAssembly'  
xmlns:wf='clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms'   
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' TargetType='{x:Type GridSplitter}'>
            <mn:ExtendedWindowsFormsHost x:Name='Grid_Splitter_WindowsFormsHost' HorizontalAlignment='Stretch'  VerticalAlignment='Stretch'>
                <wf:Label Dock='Fill' BackColor='DarkGray'></wf:Label>
            </mn:ExtendedWindowsFormsHost>
        </ControlTemplate>";
Grid_Splitter.Template = (ControlTemplate)XamlReader.Parse(template);
}

使用常规的Windows窗体主机不起作用，因为它不会将鼠标事件传递给拆分器，因此请使用ExtendedWindowsFormsHost而不是从下面的链接：

Keep Mouse Events bubbling from WindowsFormsHost on

WPF GridSplitter可见性

6 个答案: