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如何从 GUI 选项卡的列表中进行选择？

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如何从 GUI 选项卡的列表中进行选择？

我在选项卡中有一个列表框，其中列出了数据库中的内容。问题是如何使用选定的文本。

通常我会使用$result = $form.ShowDialog()但我尝试过$result = $tab.ShowDialog()并收到错误“方法调用失败，因为 [System.Windows.Forms.TabPage] 不包含‘ShowDialog’”。

有没有办法从选项卡中的列表框中进行选择？

答案1

在我看来，从表单或选项卡中选择列表框项之间没有真正的区别。在下面的代码中，将控件添加到表单和选项卡控件后，单击会将OK列表框（来自 Tab1）中的选定项显示到另一个选项卡（Tab2）。

通过 来从列表框中选择项目$listBox.SelectedItem。

Function selectButton_Click()
{
    $item = $listBox.SelectedItem
    $Resultlabel.Text = "The selected item is: $item"
    $TabControl.SelectedTab = $Tab2
}


Function closeButton_Click()
{

    $form.Close()
}

function myForm
{

    Add-Type -AssemblyName System.Windows.Forms
    Add-Type -AssemblyName System.Drawing

    $form = New-Object System.Windows.Forms.Form
    $form.Text = 'Continents'
    $form.Size = New-Object System.Drawing.Size(250,250)
    $form.StartPosition = 'CenterScreen'

    $selectButton = New-Object System.Windows.Forms.Button
    $selectButton.Location = New-Object System.Drawing.Point(20,150)
    $selectButton.Size = New-Object System.Drawing.Size(75,23)
    $selectButton.Text = 'OK'

    $selectButton.Add_Click({selectButton_Click})


 # Create tabControl and Tabs
    $TabControl = New-object System.Windows.Forms.TabControl
    $Tab1 = New-Object System.Windows.Forms.TabPage
    $Tab1.Text = 'Tab1'
    $Tab2 = New-Object System.Windows.Forms.TabPage
    $Tab2.Text = 'Tab2'

  #Tab Control 

     $tabControl.Location = New-Object System.Drawing.Point(0,0)
     $tabControl.Name = "tabControl"
     $tabControl.Size= New-Object System.Drawing.Size(180,200)
     $form.Controls.Add($tabControl)

     $tabControl.Controls.Add($Tab1)
     $tabControl.Controls.Add($Tab2)

     $Tab1.Controls.Add($selectButton)

     $closeButton = New-Object System.Windows.Forms.Button
     $closeButton.Location = New-Object System.Drawing.Point(100,150)
     $closeButton.Size = New-Object System.Drawing.Size(75,23)
     $closeButton.Text = 'Close'
     $closeButton.Add_Click({closeButton_Click})

     $Tab1.Controls.Add($closeButton)

     $label = New-Object System.Windows.Forms.Label
     $label.Location = New-Object System.Drawing.Point(20,20)
     $label.Size = New-Object System.Drawing.Size(280,20)
     $label.Text = 'Select a continent:'
     $Tab1.Controls.Add($label)


     $Resultlabel = New-Object System.Windows.Forms.Label
     $Resultlabel.Location = New-Object System.Drawing.Point(20,20)
     $Resultlabel.Size = New-Object System.Drawing.Size(200,20)
     $Resultlabel.Text = 'The selected item is:'
     $Tab2.Controls.Add($Resultlabel)


     $listBox = New-Object System.Windows.Forms.ListBox
     $listBox.Location = New-Object System.Drawing.Point(10,50)
     $listBox.Size = New-Object System.Drawing.Size(100,20)
     $listBox.Height = 80

     [void] $listBox.Items.Add('Africa')
     [void] $listBox.Items.Add('America')
     [void] $listBox.Items.Add('Asia')
     [void] $listBox.Items.Add('Europe')
     [void] $listBox.Items.Add('Oceania')

     $Tab1.Controls.Add($listBox)

     $form.ShowDialog()


}

myForm

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