如何：使用 ElementHost 在 Windows 窗体中承载 WPF 控件
ElementHost 类允许在 Windows 窗体中承载 Windows Presentation Foundation (WPF) 控件。承载该控件后，就可以接收事件并访问该控件的公开属性。承载 WPF 控件最简单的方法是向窗体添加 Panel 控件，然后在 Panel 中承载 WPF 控件。通常您可以在窗体的 Load 事件处理程序中实现此功能。
下面的代码示例演示如何使用 ElementHost 控件在 Windows 窗体中承载 WPF 控件。该示例还演示如何将处理程序附加到两个控件的自定义 OnButtonClick 事件。有关完整的示例，请参见 Hosting a Simple WPF Control in Windows Forms Sample（在 Windows 窗体中承载简单 WPF 控件示例）。
备注
在窗体发生 Load 事件时，承载的控件并未完全初始化。后来发生的控件的 Loaded 事件指示该控件已初始化。由于该控件需要获取多个属性的初始值，但是在窗体发生 Load 事件时并未定义这些属性，因此此示例将一个处理程序附加到该控件的 Loaded 事件。
示例
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Controls;
using System.Windows.Forms.Integration;
using System.Windows.Media;
namespace WFHost
{
partial class Form1 : Form
{
private ElementHost ctrlHost;
private MyControls.Page1 avAddressCtrl;
System.Windows.FontWeight initFontWeight;
double initFontSize;
System.Windows.FontStyle initFontStyle;
System.Windows.Media.SolidColorBrush initBackBrush;
System.Windows.Media.SolidColorBrush initForeBrush;
FontFamily initFontFamily;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
ctrlHost = new ElementHost();
ctrlHost.Dock = DockStyle.Fill;
panel1.Controls.Add(ctrlHost);
avAddressCtrl = new MyControls.Page1();
avAddressCtrl.InitializeComponent();
ctrlHost.Child = avAddressCtrl;
avAddressCtrl.OnButtonClick +=
new MyControls.Page1.MyControlEventHandler(
avAddressCtrl_OnButtonClick);
avAddressCtrl.Loaded += new RoutedEventHandler(
avAddressCtrl_Loaded);
}
void avAddressCtrl_Loaded(object sender, EventArgs e)
{
initBackBrush = (SolidColorBrush)avAddressCtrl.MyControl_Background;
initForeBrush = avAddressCtrl.MyControl_Foreground;
initFontFamily = avAddressCtrl.MyControl_FontFamily;
initFontSize = avAddressCtrl.MyControl_FontSize;
initFontWeight = avAddressCtrl.MyControl_FontWeight;
initFontStyle = avAddressCtrl.MyControl_FontStyle;
}
void avAddressCtrl_OnButtonClick(
object sender,
MyControls.MyControlEventArgs args)
{
if (args.IsOK)
{
lblAddress.Text = "Street Address: " + args.MyStreetAddress;
lblCity.Text = "City: " + args.MyCity;
lblName.Text = "Name: " + args.MyName;
lblState.Text = "State: " + args.MyState;
lblZip.Text = "Zip: " + args.MyZip;
}
else
{
lblAddress.Text = "Street Address: ";
lblCity.Text = "City: ";
lblName.Text = "Name: ";
lblState.Text = "State: ";
lblZip.Text = "Zip: ";
}
}
private void radioBackgroundOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Background = initBackBrush;
}
private void radioBackgroundLightGreen_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Background = new SolidColorBrush(Colors.LightGreen);
}
private void radioBackgroundLightSalmon_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Background = new SolidColorBrush(Colors.LightSalmon);
}
private void radioForegroundOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Foreground = initForeBrush;
}
private void radioForegroundRed_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Foreground = new System.Windows.Media.SolidColorBrush(Colors.Red);
}
private void radioForegroundYellow_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_Foreground = new System.Windows.Media.SolidColorBrush(Colors.Yellow);
}
private void radioFamilyOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontFamily = initFontFamily;
}
private void radioFamilyTimes_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontFamily = new FontFamily("Times New Roman");
}
private void radioFamilyWingDings_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontFamily = new FontFamily("WingDings");
}
private void radioSizeOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontSize = initFontSize;
}
private void radioSizeTen_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontSize = 10;
}
private void radioSizeTwelve_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontSize = 12;
}
private void radioStyleOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontStyle = initFontStyle;
}
private void radioStyleItalic_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontStyle = System.Windows.FontStyles.Italic;
}
private void radioWeightOriginal_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontWeight = initFontWeight;
}
private void radioWeightBold_CheckedChanged(object sender, EventArgs e)
{
avAddressCtrl.MyControl_FontWeight = FontWeights.Bold;
}
}
}