在vb(wpf)中单击按钮动态创建ComboBox [英] Dynamically create ComboBox on click of button in vb (wpf)

问题描述

如何动态创建ComboBox，以及如何将SelectionChanged事件的事件处理程序添加到动态创建的ComboBox.

我尝试过此代码

How to Create ComboBox dynamically and add event handler for SelectionChanged event to that dynamically created ComboBox.

I tried this code

Private Sub CreateWPFComboBox()
        Dim cbox As New ComboBox()
        cbox.Width = 120
        cbox.Height = 25
        Dim cboxitem1 As New ComboBoxItem()
        Dim textitem1 As New TextBox()

        cboxitem1.Content = "C# Corner"
        cbox.Items.Add(cboxitem1)
        Dim cboxitem2 As New ComboBoxItem()
        Dim textitem2 As New TextBox()
        cboxitem2.Content = "VB.NET Heaven"
        cbox.Items.Add(cboxitem2)
        textitem2.Text = cboxitem2.ToString()
        Dim cboxitem3 As New ComboBoxItem()
        Dim textitem3 As New TextBox()
        cboxitem3.Content = "MSDN"
        cbox.Items.Add(cboxitem3)
        textitem3.Text = cboxitem3.ToString()

        cbox.SelectionChanged += New AddressOf CreateWPFComboBox

        parent.Children.Add(cbox)
    End Sub

但是事件处理程序无法正常工作会给我错误

因此任何人都可以帮助我如何在选择更改列表项后将事件处理程序添加到此动态创建的combobx中.

But Event handler not working it''s give me error

so anyone help me how to add event handler to this dynamically created combobx on selection changed of list items

推荐答案

添加事件处理程序的代码

The code for adding eventhandler

cbox.SelectionChanged += New AddressOf CreateWPFComboBox

看起来像c#kode :)
它应该看起来像这样:

looks like c# kode :)
it should look like this:

AddHandler(cbox.SelectionChanged),AddressOf CreateWPFComboBox   

此外，为了能够将子CreateWPFComboBox用作此事件的事件处理程序，它应如下所示:

Furthermore, to be able to use the sub CreateWPFComboBox as an eventhandler for this event, it should look like this:

Private Sub CreateWPFComboBox(ByVal sender As Object, ByVal e As System.Windows.Controls.SelectionChangedEventArgs)

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