我有一个使用out-gridview 显示结果的脚本。这是一个简单的例子：
"hello world" | out-gridview
当我使用 Run with PowerShell 运行脚本时，它会打开 gridview 并在打开后立即关闭它。 （我认为这是因为 gridview 不是模态的，脚本完成了。）
如何让PowerShell等到gridview手动关闭？
【问题讨论】：
标签： gridview powershell
怎么样：
"hello world" | out-gridview -wait
根据the documentation of Out-GridView，选项-Wait 会阻止Windows PowerShell 关闭，直到Out-GridView 窗口关闭。
它在 Windows PowerShell 3.0 中可用。
【讨论】：
只需将-PassThru 添加到 Out-Gridview - 将“确定”和“取消”按钮添加到 gridview - 现在您可以“使用 powershell 运行”并在完成后使用 OK 按钮关闭 gridview 窗口 -太简单了！
【讨论】：
-Wait。
您可以使用-noexit 运行 Powershell.exe 或试试这个：
"hello world" | out-gridview
Read-Host "press enter to exit"
更新：
Out-GridView 是非阻塞的，所以如果你想测试它是否退出，你必须求助于一些低级别的 Win32 API。以下代码在 ISE 中有效（尚未在控制台主机中对其进行测试）。它也有一个限制——它基本上会寻找与主机进程关联的任何窗口，而不是主机进程的主窗口。到那时，它会返回。事实证明 Out-GridView 不是主窗口的子窗口，并且其标题不一致（GPS | Out-GridView 或 GPS | ogv 或 GPS | <any alias you make up>）：
$src = @'
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
namespace Utils
{
public delegate bool Win32Callback(IntPtr hwnd, IntPtr lParam);
public class WindowHelper
{
private const int PROCESS_QUERY_LIMITED_INFORMATION = 0x1000;
private IntPtr _mainHwnd;
private IntPtr _ogvHwnd;
private IntPtr _poshProcessHandle;
private int _poshPid;
private bool _ogvWindowFound;
public WindowHelper()
{
Process process = Process.GetCurrentProcess();
_mainHwnd = process.MainWindowHandle;
_poshProcessHandle = process.Handle;
_poshPid = process.Id;
}
public void WaitForOutGridViewWindowToClose()
{
do
{
_ogvWindowFound = false;
EnumChildWindows(IntPtr.Zero, EnumChildWindowsHandler,
IntPtr.Zero);
Thread.Sleep(500);
} while (_ogvWindowFound);
}
[DllImport("User32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(
IntPtr parentHandle, Win32Callback callback, IntPtr lParam);
[DllImport("Oleacc.dll")]
public static extern IntPtr GetProcessHandleFromHwnd(IntPtr hwnd);
[DllImport("Kernel32.dll")]
public static extern int GetProcessId(IntPtr handle);
[DllImport("Kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool DuplicateHandle(
IntPtr hSourceProcessHandle,
IntPtr hSourceHandle,
IntPtr hTargetProcessHandle,
out IntPtr lpTargetHandle,
int dwDesiredAccess,
bool bInheritHandle,
int dwOptions);
[DllImport("Kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool CloseHandle(IntPtr handle);
[DllImport("Kernel32.dll")]
public static extern int GetLastError();
private bool EnumChildWindowsHandler(IntPtr hwnd, IntPtr lParam)
{
if (_ogvHwnd == IntPtr.Zero)
{
IntPtr hProcess = GetProcessHandleFromHwnd(hwnd);
IntPtr hProcessDup;
if (!DuplicateHandle(hProcess, hProcess, _poshProcessHandle,
out hProcessDup,
PROCESS_QUERY_LIMITED_INFORMATION,
false, 0))
{
Console.WriteLine("Dup process handle {0:X8} error: {1}",
hProcess.ToInt32(), GetLastError());
return true;
}
int processId = GetProcessId(hProcessDup);
if (processId == 0)
{
Console.WriteLine("GetProcessId error:{0}",
GetLastError());
return true;
}
if (processId == _poshPid)
{
if (hwnd != _mainHwnd)
{
_ogvHwnd = hwnd;
_ogvWindowFound = true;
CloseHandle(hProcessDup);
return false;
}
}
CloseHandle(hProcessDup);
}
else if (hwnd == _ogvHwnd)
{
_ogvWindowFound = true;
return false;
}
return true;
}
}
}
'@
Add-Type -TypeDefinition $src
Get-Process | Out-GridView
$helper = new-object Utils.WindowHelper
$helper.WaitForOutGridViewWindowToClose()
"Done!!!!"
【讨论】：
由于某种原因，Keith 的解决方案对我不起作用。当我运行它时，我得到了错误，并且该过程终止而无需等待网格关闭。我得到这样的输出：
...
GetProcessId error:6
Dup process handle 0000015C error: 6
GetProcessId error:6
GetProcessId error:6
Dup process handle 00000148 error: 6
GetProcessId error:6
GetProcessId error:6
...
我不太了解 Keith 的解决方案中使用的 Windows API。但是经过一番挖掘，我确实找到了一种修改更简单的解决方案的方法。它涉及更少的 API 调用和导入，也不会产生任何错误。这就是我想出的。
$src = @'
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
namespace Utils
{
public delegate bool Win32Callback(IntPtr hwnd, IntPtr lParam);
public class WindowHelper
{
private const int PROCESS_QUERY_LIMITED_INFORMATION = 0x1000;
private IntPtr _mainHwnd;
private IntPtr _ogvHwnd;
private IntPtr _poshProcessHandle;
private int _poshPid;
private bool _ogvWindowFound;
public WindowHelper()
{
Process process = Process.GetCurrentProcess();
_mainHwnd = process.MainWindowHandle;
_poshProcessHandle = process.Handle;
_poshPid = process.Id;
}
public void WaitForOutGridViewWindowToClose()
{
do
{
_ogvWindowFound = false;
EnumChildWindows(IntPtr.Zero, EnumChildWindowsHandler,
IntPtr.Zero);
Thread.Sleep(500);
} while (_ogvWindowFound);
}
[DllImport("User32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(
IntPtr parentHandle, Win32Callback callback, IntPtr lParam);
[DllImport("User32.dll")]
public static extern int GetWindowThreadProcessId(IntPtr hWnd, out int processId);
[DllImport("Kernel32.dll")]
public static extern int GetLastError();
private bool EnumChildWindowsHandler(IntPtr hwnd, IntPtr lParam)
{
if (_ogvHwnd == IntPtr.Zero)
{
int processId;
int thread = GetWindowThreadProcessId(hwnd, out processId);
if (processId == 0)
{
Console.WriteLine("GetWindowThreadProcessId error:{0}",
GetLastError());
return true;
}
if (processId == _poshPid)
{
if (hwnd != _mainHwnd)
{
_ogvHwnd = hwnd;
_ogvWindowFound = true;
return false;
}
}
}
else if (hwnd == _ogvHwnd)
{
_ogvWindowFound = true;
return false;
}
return true;
}
}
}
'@
Add-Type -TypeDefinition $src
Get-Process | Out-GridView
$helper = new-object Utils.WindowHelper
$helper.WaitForOutGridViewWindowToClose()
希望这可以帮助其他人摆脱与我相同的问题。
【讨论】：
这将使窗口保持打开状态：
$DataResults | Out-GridView -Title $Title -PassThru | clip
这允许您显示带有标题的对象列表（例如），当您单击“确定”时，它会将数据保存到剪贴板。
【讨论】：