Visual Basic動態文本框

Question

應用程式和程式碼

Private Sub PriceBox_Click(sender As Object, e As EventArgs) Handles PriceBox.Click
    If CmbSize.SelectedIndex = 0 Then
        PriceBox.Text = "£30"
    ElseIf CmbSize.SelectedIndex = 1 Then
        PriceBox.Text = "£40"
    ElseIf CmbSize.SelectedIndex = 2 Then
        PriceBox.Text = "£50"
    End If

End Sub

此代碼有效，但僅在單擊時有效，選擇組合框索引時，我需要使用它來自動更改哪些子代碼

Answer 1

如果只希望用戶更改索引而不是程序更改，請使用

SelectionChangeCommitted

https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.combobox.selectionchangecommitted?view=netframework-4.7.2

Answer 2

您將需要處理CmbSize控件上的SelectedIndexChanged，如https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.combobox.selectedindexchanged?view=netframework-4.7.2中所示

Answer 3

組合框具有SelectedIndexChanged事件 ，可以使用：

Private Sub CmbSize_Changed(sender As Object, e As EventArgs) Handles CmbSize.SelectedIndexChanged   

End Sub