我有一个winforms应用程序，想要添加一个WPF用户控件。问题在于当我运行程序时，WPF用户控件无法响应鼠标事件。我可以通过控件进行Tab操作并使用键盘，但是控件不会响应鼠标点击（按钮甚至不能识别鼠标悬停）。我尝试了这个SO问题中的解决方案，但没有帮助：WPF WinForms Interop issue with Enable / Disable。请查看下面的代码。
用户控件XAML
窗体除了ElementHost为空（即没有更改的新项目）。 如果您需要该代码，请告诉我。任何帮助将不胜感激。
用户控件XAML
<UserControl x:Class="WinformsWPF.ucNotes"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="400" d:DesignWidth="460" Background="#FFD7DFEC" IsHitTestVisible="False" Loaded="Window_Loaded">
<UserControl.Resources>
<LinearGradientBrush x:Key="DataGridHeaderBackgroundBrush" StartPoint="0,0" EndPoint="0,1">
<GradientStop Color="#b3dbcc" Offset="0" />
<GradientStop Color="#61a99b" Offset="1" />
</LinearGradientBrush>
</UserControl.Resources>
<Grid x:Name="LayoutRoot">
<Label Content="Notes" HorizontalAlignment="Left" Margin="8,8,0,0" VerticalAlignment="Top" FontSize="16" FontWeight="Bold"/>
<DataGrid x:Name="dgNotes" Margin="8,50,8,0" VerticalAlignment="Top" Height="121.28" d:LayoutOverrides="HorizontalAlignment" Background="#FFE4EEF3" AutoGenerateColumns="False" HorizontalGridLinesBrush="{x:Null}" VerticalGridLinesBrush="{x:Null}" ColumnWidth="Auto" CanUserDeleteRows="False" CanUserAddRows="False" CanUserReorderColumns="False" CanUserResizeRows="False" IsReadOnly="True" SelectionMode="Single" SelectionChanged="dgNotes_SelectionChanged" RowHeaderWidth="0" BorderBrush="{x:Null}" SelectedIndex="0">
<DataGrid.Columns>
<DataGridTextColumn x:Name="nDate" Header="Date"/>
<DataGridTextColumn x:Name="nEmployee" Header="Employee"/>
<DataGridTextColumn x:Name="nText" Header="Note" Width="*"/>
</DataGrid.Columns>
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="Padding" Value="6" />
<Setter Property="BorderBrush" Value="#489283" />
<Setter Property="BorderThickness" Value="1" />
<Setter Property="Background" Value="{StaticResource DataGridHeaderBackgroundBrush}" />
</Style>
<Style TargetType="{x:Type DataGridRow}">
<Setter Property="Background" Value="Transparent" />
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="#66D7DFEC" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="#DDD7DFEC" />
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Margin" Value="3" />
<Setter Property="Padding" Value="3" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="Black" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
</DataGrid>
<Grid Margin="8,175.28,8,8" >
<Grid.RowDefinitions>
<RowDefinition Height="Auto" MinHeight="25.96"/>
<RowDefinition Height="Auto" MinHeight="25.96"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" MinWidth="61.757"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Label Content="Date" d:LayoutOverrides="Height" HorizontalAlignment="Left"/>
<Label Content="Employee" Grid.Row="1" d:LayoutOverrides="Width"/>
<Label Content="Notes" Grid.Row="2" HorizontalAlignment="Left" VerticalAlignment="Top"/>
<Label x:Name="lblDate" Content="lblDate" Grid.Column="1" HorizontalAlignment="Left" d:LayoutOverrides="Height"/>
<Label Content="lblEmployee" Grid.Column="1" HorizontalAlignment="Left" Grid.Row="1" d:LayoutOverrides="Height" Name="lblEmployee" />
<TextBox x:Name="txtNotes" Grid.Column="1" Grid.Row="2" TextWrapping="Wrap" d:LayoutOverrides="Width" LostFocus="txtNotes_LostFocus" />
</Grid>
<Button x:Name="btnDelete" HorizontalAlignment="Right" Margin="0,8,8,0" VerticalAlignment="Top">
</Button>
<Button x:Name="btnAdd" HorizontalAlignment="Right" Margin="0,8,50,0" VerticalAlignment="Top" Click="btnAdd_Copy_Click">
</Button>
</Grid>
</UserControl>
用户控件CS
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
namespace WinformsWPF
{
/// <summary>
/// Interaction logic for ucNotes.xaml
/// </summary>
public partial class ucNotes : UserControl
{
List<noteItem> notes;
List<string> noteColumns;
public ucNotes()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
notes = new List<noteItem>
{
new noteItem{nID = 0, nDate = Convert.ToDateTime("9/5/2012 2:48 PM"), nEmployee = "Gardner, John", nText = "This is a test note"},
new noteItem{nID = 1, nDate = Convert.ToDateTime("9/5/2012 2:51 PM"), nEmployee = "Gardner, John", nText = "This is another test note. This test note is very long. It should cause overlap."}
};
noteColumns = new List<string> { "nDate", "nEmployee", "nText" };
dgNotes.GenerateColumns(noteColumns);
dgNotes.ItemsSource = notes;
}
private void dgNotes_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
noteItem noteInfo = (noteItem)dgNotes.SelectedItem;
lblDate.Content = noteInfo.nDate;
lblEmployee.Content = noteInfo.nEmployee;
txtNotes.Text = noteInfo.nText;
}
private void txtNotes_LostFocus(object sender, RoutedEventArgs e)
{
((noteItem)dgNotes.SelectedItem).nText = txtNotes.Text;
dgNotes.Items.Refresh();
}
private void btnAdd_Copy_Click(object sender, RoutedEventArgs e)
{
notes.Add(new noteItem { nDate = DateTime.Now, nEmployee = "Gardner, John" });
dgNotes.SelectedIndex = dgNotes.Items.Count - 1;
dgNotes.Items.Refresh();
txtNotes.Focus();
}
}
public static class dataGridExtension
{
public static void GenerateColumns(this DataGrid dataGrid, List<string> columns)
{
List<DataGridColumn> oldColumns = dataGrid.Columns.ToList();
dataGrid.Columns.Clear();
int index = 0;
foreach (var column in oldColumns)
{
var newCol = (DataGridTextColumn)column;
newCol.Binding = new Binding(columns[index++]);
dataGrid.Columns.Add(newCol);
}
}
}
public class noteItem
{
public int nID { set; get; }
public DateTime nDate { set; get; }
public string nEmployee { set; get; }
public string nText { set; get; }
}
}
窗体除了ElementHost为空（即没有更改的新项目）。 如果您需要该代码，请告诉我。任何帮助将不胜感激。