Question

我希望用户单击单选按钮，然后单击“提交”按钮。按下提交按钮后，它会更改文本框值。但Visual Studio告诉我，我需要使用“引发事件”。我不知道如何使用它或甚至需要它？这是代码：

   Private Sub create_Click(sender As Object, e As RoutedEventArgs)
        If RadioButton1.Checked = True Then
            Me.creflag.Text += "1"

        ElseIf RadioButton2.Checked = True Then
            Me.creflag.Text += "4224"

        ElseIf RadioButton3.Checked = True Then
            Me.creflag.Text += "2"

        ElseIf RadioButton4.Checked = True Then
            Me.immune.Text += "619659263"
            Me.typeflag.Text += "4"
        End If
    End Sub

Answer 1

在您的XAML标记中，您有

.... Click="Button_Click"

这意味着你需要一个名为Button_Click的RouterEventHandler而不是create_Click

Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
    If RadioButton1.Checked = True Then
        Me.creflag.Text += "1"

    ElseIf RadioButton2.Checked = True Then
        Me.creflag.Text += "4224"

    ElseIf RadioButton3.Checked = True Then
        Me.creflag.Text += "2"

    ElseIf RadioButton4.Checked = True Then
        Me.immune.Text += "619659263"
        Me.typeflag.Text += "4"
    End If
End Sub

See MSDN docs and examples

Answer 2

好的，我发现我正在将Windows窗体和WPF混合在一起。在Windows窗体中它是.Checked但在WPF中这是一个事件因此它给我的错误。 WPF中的正确方法是.IsChecked

最终守则：

Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs) Handles Button.Click
    If RadioButton1.IsChecked = True Then
        Me.creflag.Text += "1"

    ElseIf RadioButton2.IsChecked = True Then
        Me.creflag.Text += "4224"

    ElseIf RadioButton3.IsChecked = True Then
        Me.creflag.Text += "2"

    ElseIf RadioButton4.IsChecked = True Then
        Me.immune.Text += "619659263"
        Me.typeflag.Text += "4"
    End If
End Sub

带提交按钮的Visual Basic单选按钮

2 个答案: