Vb.net如何增加数组的值？

Question

看起来是这样的：

Dim a As Integer

    a = ComboBox1.SelectedItem()

    Label1.Text += a

我想添加从combobox1中选择的所有值

Answer 1

如果我正确理解以下是OP寻找的代码，

 Dim intVal As Integer
 Private Sub ComboBox1_SelectedValueChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedValueChanged

    If Label1.Text = String.Empty Then
        Label1.Text = ComboBox1.SelectedItem.ToString
        intVal = Convert.ToInt32(ComboBox1.SelectedItem)
    Else
        Label1.Text = Label1.Text & "+" & ComboBox1.SelectedItem.ToString
        intVal = intVal + Convert.ToInt32(ComboBox1.SelectedItem)
    End If
 End Sub