vb.net組合框selectedvalue事件錯誤

Question

我收到此錯誤“沒有為類型'CivilStatus'和類型'Integer'定義運算符'='。”

碼：

Private Sub cboCivilStatus_SelectedValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboCivilStatus.SelectedValueChanged

    If cboCivilStatus.SelectedValue = 2 Then
        dtpDateMarried.Enabled = True
    Else
        dtpDateMarried.Enabled = False
    End If

End Sub

Answer 1

好的，您應該嘗試使用Combobox SelectedIndexChanged事件

Private Sub cboCivilStatus_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboCivilStatus.SelectedIndexChanged
        If cboCivilStatus.Text = "2" Then
            dtpDateMarried.Enabled = True
        Else
            dtpDateMarried.Enabled = False
        End If

    End Sub

Answer 2

看起來SelectedValue包含一個CivilStatus類的對象。 如果要查找所選項目的索引，請改用cboCivilStatus.SelectedIndex屬性：

If cboCivilStatus.SelectedIndex = 2 Then

但是，如果您需要CivilStatus的屬性， CivilStatus需要檢查該屬性，例如

If CType(cboCivilStatus.SelectedValue, CivilStatus).MyIntProperty = 2 Then