WindowsFormsHost在WPF中不显示托管的应用程序

Question

在我的WPF中，我有一个包含WindowsFormsHost的网格，它将托管一个。exe。我的。xaml代码是:

<Window x:Class="PracticeWPF.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:PracticeWPF"
mc:Ignorable="d"
Title="MainWindow" Height="800" Width="1300">
<Grid x:Name="grid">
<Button x:Name="BtnRun" Content="Run" 
HorizontalAlignment="Left" Margin="10,10,0,0"
VerticalAlignment="Top" Click="BtnRun_Click"/>
<WindowsFormsHost x:Name="formshost" Margin="0,39,0,0"
Height="720" Width="1280"/>
</Grid>
</Window>

和我的cs:

namespace PracticeWPF
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
[DllImport("user32.dll")]
public static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
private void BtnRun_Click(object sender, EventArgs e)
{
Process proc = Process.Start("notepad.exe"); 
proc.WaitForInputIdle();
while (proc.MainWindowHandle == IntPtr.Zero)
{
Thread.Sleep(100);
proc.Refresh();
}
SetParent(proc.MainWindowHandle, formshost.Handle);
}    
}
}

当我使用WinForm时一切都有效，但当我在WPF中使用WindowsFormsHosting时，.exe不可见。任何帮助都将非常感激。谢谢你。

Answer 1

在此链接对接窗口内的另一个窗口，我认为你的答案。我匹配了你的代码

xaml

<Window x:Class="PracticeWPF.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"  
xmlns:local="clr-namespace:PracticeWPF"
mc:Ignorable="d"
Title="MainWindow" Height="800" Width="1300">
<Grid x:Name="grid">
<Button x:Name="BtnRun" Content="Run" 
HorizontalAlignment="Left" Margin="10,10,0,0"
VerticalAlignment="Top" Click="BtnRun_Click"/>
<WindowsFormsHost x:Name="formshost" Margin="0,39,0,0"
Height="720" Width="1280">
<wf:Button Text="by button" Visible="False"></wf:Button>
</WindowsFormsHost>
</Grid>
</Window>

和mainwindow.cs

namespace PracticeWPF
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void BtnRun_Click(object sender, EventArgs e)
{
//Process proc = Process.Start("notepad.exe");
//proc.WaitForInputIdle();
//while (proc.MainWindowHandle == IntPtr.Zero)
//{
//    Thread.Sleep(100);
//    proc.Refresh();
//}
this.Width = formshost.Width;
this.Height = formshost.Height;
dockIt();
}

[DllImport("user32.dll")]
public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
private Process pDocked;
private IntPtr hWndOriginalParent;
private IntPtr hWndDocked;
[DllImport("user32.dll", SetLastError = true)]
public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

private void dockIt()
{
if (hWndDocked != IntPtr.Zero) //don't do anything if there's already a window docked.
return;
IntPtr hWndParent = IntPtr.Zero;
pDocked = Process.Start(@"notepad");
while (hWndDocked == IntPtr.Zero)
{
pDocked.WaitForInputIdle(1000); //wait for the window to be ready for input;
pDocked.Refresh();              //update process info
if (pDocked.HasExited)
{
return; //abort if the process finished before we got a handle.
}
hWndDocked = pDocked.MainWindowHandle;  //cache the window handle
}
//Windows API call to change the parent of the target window.
//It returns the hWnd of the window's parent prior to this call.
hWndOriginalParent = SetParent(hWndDocked, formshost.Handle);
//Wire up the event to keep the window sized to match the control
formshost.SizeChanged += new SizeChangedEventHandler(Panel1_Resize);
//Perform an initial call to set the size.
Panel1_Resize(new Object(), new EventArgs());
}
private void undockIt()
{
//Restores the application to it's original parent.
SetParent(hWndDocked, hWndOriginalParent);
}
private void Panel1_Resize(object sender, EventArgs e)
{
//Change the docked windows size to match its parent's size. 
MoveWindow(hWndDocked, 0, 0, (int)formshost.Width, (int)formshost.Height, true);
}
}
}

Answer 2

我担心WindowsFormsHost不能用于在另一个应用程序中托管整个Windows窗体应用程序。

它用于在WPF视图中托管单个Windows窗体控件。

如果您想获得WPF窗口的句柄，请尝试使用:

new System.Windows.Interop.WindowInteropHelper(this).Handle

您想使用此句柄而不是formshost.Handle。