允许在 WPF 页面上承载 Windows Forms控件的元素。
命名空间：
程序集： WindowsFormsIntegration（在 WindowsFormsIntegration.dll 中） 用于 XAML 的 XMLNS：http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
add: http://msdn.microsoft.com/zh-cn/library/system.windows.forms.integration.windowsformshost
如果要引用的话
<Window x:Class="Selection.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms" Title="Dates" Height="314" Width="373"> <Grid> <Label HorizontalAlignment="Left" Margin="20,25,0,0" Name="label1" Width="35.63" Height="23.2766666666667" VerticalAlignment="Top">First</Label> <Label Height="23.2766666666667" HorizontalAlignment="Left" Margin="20,56,0,0" Name="label2" VerticalAlignment="Top" Width="52.63">Second</Label> <WindowsFormsHost Name="hostFirst" Margin="85,25,18,0" Height="23.2766666666667" VerticalAlignment="Top"> <wf:DateTimePicker Name="first"/> </WindowsFormsHost> <WindowsFormsHost Name="hostSecond" Margin="85,56,18,0" Height="23.2766666666667" VerticalAlignment="Top"> <wf:DateTimePicker Name="second"/>//文本框里是日期 </WindowsFormsHost> <Button Height="23" HorizontalAlignment="Left" Margin="20,100,0,0" Name="compare" VerticalAlignment="Top" Width="75" Click="compareClick">Compare</Button> <TextBox Margin="20,131,104,20" Name="info" TextWrapping="WrapWithOverflow" AcceptsReturn="False" IsReadOnly="True" /> <Button Height="22" HorizontalAlignment="Right" Margin="0,0,18,20" Name="quit" VerticalAlignment="Bottom" Width="75" Click="quitClick">Quit</Button> </Grid> </Window>
后台C#
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Forms;namespace Selection {
/// <summary>
/// Interaction logic for Window1.xaml /
// </summary> public partial class Window1 : Window {
private DateTimePicker first;
private DateTimePicker second; public Window1() {
InitializeComponent();
//
| 获取或设置由 WindowsFormsHost 元素承载的子控件。 |
first = hostFirst.Child as DateTimePicker;
second = hostSecond.Child as DateTimePicker; }
private void quitClick(object sender, RoutedEventArgs e) {this.Close();
}
private void compareClick(object sender, RoutedEventArgs e) {int diff = dateCompare(first.Value, second.Value);
info.Text = "";
show("first == second", diff == 0);
show("first != second", diff != 0);
show("first < second", diff < 0);
show("first <= second", diff <= 0);
show("first > second", diff > 0);
show("first >= second", diff >= 0); }
private void show(string exp, bool result) {info.Text += exp;
info.Text += " : " + result.ToString();
info.Text += "\r\n";
//\r 表示：回车符(ACSII：13 或0x0d)，就是我们常说的硬回车。
// \n 表示：换行(ACSII：10 或0x0a)，就是我们常说的软回车。
//\n，好比你在DreamWeaver里做一个网页，在源代码里按一下回车，是给源代码换行。
} private int dateCompare(DateTime leftHandSide, DateTime rightHandSide) {// TO DO
return 42;
}
}
}
在wpf程序中整合windows form：
1.在references中添加WindowsFormsIntegration和System.Windows.Forms。
2.在xaml中使用的时候要写清楚名字空间，可以把这两个ns定义出来。
下面两句是重点，wpf书写的时候一定要注意引用
xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
xmlns:wfi="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
插入WindowsFormsControl：
<wfi:WindowsFormsHost> <wf:DateTimePicker/> </wfi:WindowsFormsHost>
看到Windows.Forms下面也有Button控件（废话），于是想知道这个Button和WPF通常用的System.Windows.Controls.Button有什么不同。
看了看两者的继承体系：
System.Windows.Controls域中: Button<ButtonBase<ContentControl<Control
System.Windows.Forms域: Button<ButtonBase<Control
看似差不多，其实他们完全存在于两个不同的空间，没有一点联系。
两个Button类里定义的内容也不尽相同，Forms.Button看上去内容丰富一些，发现里面有DoubleClick这个event，但是试了试并不起作用，换到windows form 程序下仍然不起作用。（Visual Studio的property界面上看不到这个事件，但是可以在代码里自己加event handler，虽然加了也白加）。Controls.Button里虽然没有DoubleClick，但是MouseDoubleClick是work的。而Forms.Button似乎就只能触发Click事件。
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300">
<Grid xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
xmlns:wfi="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration" >
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button Grid.Row="1" MouseDoubleClick="Button_MouseDoubleClick">button</Button>
<wfi:WindowsFormsHost Grid.Row="0">
<wf:Button MouseDoubleClick="Button_MouseDoubleClick"/>
</wfi:WindowsFormsHost> </Grid> </Window>
这两个事件对应的event类型也不一样，一个是System.Windows.Input.MouseButtonEventHandler，一个是System.Windows.Forms.MouseEventHandler，所以对应的event handler的函数的参数也不一样，一个是private void Button_MouseDoubleClick(object sender, MouseButtonEventArgs e)，一个是private void Button_MouseDoubleClick(object sender, System.Windows.Forms.MouseEventArgs e)，因此两个event handler函数名可以相同。