MessageBox 仅在表单关闭后显示

Question

创建一个简单的 GUI 以使用给定的用户名作为参数运行自定义函数。

点击搜索按钮后，我需要将自定义函数的结果返回给用户。最好不要关闭整个东西并允许他们再次搜索，但这是我第一次构建 GUI

import-module "{path to my custom module}"



#region Prereqs
[reflection.assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null
#endregion

#region Create Window with textbox and button
$searchForm = New-Object System.Windows.Forms.Form
$unameTextBox = New-Object System.Windows.Forms.TextBox
$searchButton = New-Object System.Windows.Forms.Button


$unameTextBox.Location = '23,23'
$unameTextBox.Size = '150,23'
$unameTextBox.Text = 'Enter username...'

$searchButton.Text = 'Search'
$searchButton.Location = '196,23'


$searchForm.Controls.Add($unameTextBox)
$searchForm.Controls.Add($searchButton)
$searchForm.Text = 'Lit hold search'
$searchForm.ShowDialog()

#function takes 1 argument (uname), performs AD lookup and returns True/False
$status = (Get-MyCustomFunction $unameTextBox.Text)
$searchButton.Add_Click([System.Windows.Forms.Messagebox]::Show($status))

#endregion

我希望单击搜索按钮后会弹出消息框。相反，它仅在表单关闭后显示。理想情况下，我希望保持表单打开并允许进行其他搜索。也许有比消息框更好的选择来显示简单的消息？

编辑：

如果提供额外的上下文，我现在会收到以下错误...

Cannot convert argument "value", with value: "OK", for "add_Click" to type "System.EventHandler": "Cannot convert value "OK" to type "System.EventHandler". Error: "Invalid cast from 
'System.Windows.Forms.DialogResult' to 'System.EventHandler'.""
At C:\Modules\lithold.ps1:33 char:1
+ $searchButton.Add_Click([System.Windows.Forms.Messagebox]::Show($stat ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodArgumentConversionInvalidCastArgument

Answer 1

您必须在调用ShowDialog（基本上是您设置该按钮的位置）之前添加您的点击处理程序，并且必须以这种方式添加：

$searchButton.Add_Click(
  {
    $status = (Get-MyCustomFunction $unameTextBox.Text)
    [System.Windows.Forms.Messagebox]::Show($status)
  }
)

更多信息例如在这里：https://social.technet.microsoft.com/wiki/contents/articles/25911.how-to-add-a-powershell-gui-event-handler-part-1.aspx