winforms - 使用Windows窗体在脚本终止后数分钟内锁定PowerShell ISE

Question

我在这里有一个有趣的问题。我正在创建一个日历选择器，以便在创建帐户时使用。它可以正常工作，并且仍在进行中，但是我注意到，当我在Powershell ISE中运行脚本时，几分钟后它将锁定(在此之前，我可以编辑和保存代码几分钟)。事件日志中没有任何内容。我收到一个对话框，说Powershell没有响应。内存使用情况似乎也很正常。我不知道发生了什么。

无论我如何运行Powershell ISE(以管理员身份运行，以另一个帐户运行，以及以普通ISE运行)，我都会运行Windows 8.1。

一位同事建议这可能是公寓模型，因此我尝试了STA和MTA，但是无论哪种方式都会出现问题。从控制台主机运行相同的代码时，不会发生这种情况。

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") 

$objForm = New-Object Windows.Forms.Form 

$objForm.Text = "Select a Date" 
$objForm.Size = New-Object Drawing.Size @(490,250)
$objForm.StartPosition = "CenterScreen"

$objForm.KeyPreview = $True

$objForm.Add_KeyDown({
    if ($_.KeyCode -eq "Enter") 
        {
            $script:dtmDate=$objCalendar.SelectionStart
            $objForm.Close()
        }
    })

$objForm.Add_KeyDown({
    if ($_.KeyCode -eq "Escape") 
        {
            $objForm.Close()
        }
    })

$objCalendar = New-Object System.Windows.Forms.MonthCalendar 
$objCalendar.Text = "Start"
$objCalendar.ShowTodayCircle = $False
$objCalendar.MaxSelectionCount = 1
$objForm.Controls.Add($objCalendar) 

$objForm.Topmost = $True

$objForm.Add_Shown({$objForm.Activate()})  
[void] $objForm.ShowDialog() 

if ($dtmDate)
    {
        Write-Host "Date selected: $dtmDate"
    }

$objForm.Dispose()

回应@The Unique Paul Smith

function Find-CalenderDateTest {
[CmdletBinding()]
param(
    [Parameter(
        Mandatory=$false
    )]
    [ValidateSet('long','short','powerpoint')]
    [ValidateNotNullOrEmpty()]
    [string]
    $DateFormat

)

Begin{
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") 

$objForm = New-Object Windows.Forms.Form 

$objForm.Text = "Select a Date" 
$objForm.Size = New-Object Drawing.Size @(243,250) 
$objForm.StartPosition = "CenterScreen"

$objForm.KeyPreview = $True

$dtmDate = $null

$objForm.Add_KeyDown( {
    if ($_.KeyCode -eq "Enter") 
        {
            $dtmDate=$objCalendar.SelectionStart
            $objForm.Close()
        }
    })


$objForm.Add_KeyDown({
    if ($_.KeyCode -eq "Escape") 
        {
            $objForm.Close()
        }
    })

#region   OK Button
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Size(20,175)
$OKButton.Size = New-Object System.Drawing.Size(75,23)
$OKButton.Text = "OK"

# Got rid of the Click event for OK Button, and instead just assigned its DialogResult property to OK.
$OKButton.DialogResult = [System.Windows.Forms.DialogResult]::OK

$objForm.Controls.Add($OKButton)

# Setting the form's AcceptButton property causes it to automatically intercept the Enter keystroke and
# treat it as clicking the OK button (without having to write your own KeyDown events).
$objForm.AcceptButton = $OKButton
#endregion 

#region Cancel Button
$CancelButton = New-Object System.Windows.Forms.Button
$CancelButton.Location = New-Object System.Drawing.Size(80,175)
$CancelButton.Size = New-Object System.Drawing.Size(75,23)
$CancelButton.Text = "Cancel"

# Got rid of the Click event for Cancel Button, and instead just assigned its DialogResult property to Cancel.
$CancelButton.DialogResult = [System.Windows.Forms.DialogResult]::Cancel

$objForm.Controls.Add($CancelButton)

# Setting the form's CancelButton property causes it to automatically intercept the Escape keystroke and
# treat it as clicking the OK button (without having to write your own KeyDown events).
$objForm.CancelButton = $CancelButton
#endregion 

$objCalendar = New-Object System.Windows.Forms.MonthCalendar 
$objCalendar.ShowTodayCircle = $False
$objCalendar.MaxSelectionCount = 1
$objForm.Controls.Add($objCalendar) 

$objForm.Topmost = $True

$objForm.Add_Shown({$objForm.Activate()})  

$Results = $objForm.ShowDialog()
}

Process{}

End{
if ($Results -eq "OK")
    {
    $objCalendar.SelectionStart
    }

$objForm.Dispose()

}
}

Answer 1

错误是MTA / STA

不要使用

$form.showDialog()

使用

[system.windows.forms.application]::run($form)

代替

而且每次都能正常工作

另一种方法是将其放在另一个线程中:

$code
{
  //form code here
  $form.showDialog()
}
$newThread = [Powershell]::Create()
$newThread.AddScript($code)
$handle = $newThread.BeginInvoke() 

提供调用脚本中的变量:
$newThread.Runspace.SessionStateProxy.SetVariable("variablenname",value)

在 BeginInvoke之前使用不带$ ...的 variablenname