vb.net - 選択したインデックスに関連付けられた文字列を出力するにはどうすればよいですか...私の出力は選択したインデックス整数です（これは必要ありません）

Question

私は学生です、私に耐えてください...以下は私のコードです：

Private Sub cboYear_SelectedIndexChanged(ByVal sender As System.Object, 
 ByVal e As System.EventArgs) Handles cboYear.SelectedIndexChanged

  'declare variables
  Dim intSelectedYear As Integer
  Dim intNumhUUR As Integer

  'select year from combobox
  intSelectedYear = cboYear.SelectedIndex

  ' get number of hurricanes for selected year from number 
  ' of hurricanes array 
  intNumhUUR = _intNumberOfHurricanes(intSelectedYear)

  'and display in label
  lblNumberOfHurricanes.Visible = True
  lblNumberOfHurricanes.Text = "The number of Hurricanes " &
    "in the year " & intSelectedYear.ToString & "  is " & 
    intNumhUUR.ToString()
End Sub

Answer 1

SelectedItemその場所で現在選択されているアイテムを取得するには、コンボボックスのプロパティを使用する必要がありSelectedIndexます。すなわち:

Private Sub cboYear_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboYear.SelectedIndexChanged
  'declare variables
  Dim intSelectedIndex As Integer
  Dim intNumhUUR As Integer
  Dim strSelectedYear As String

  'select year from combobox
  intSelectedIndex = cboYear.SelectedIndex
  strSelectedYear = cboYear.SelectedItem.ToString()
  ' get number of hurricanes for selected year from number 
  ' of hurricanes array 
  intNumhUUR = _intNumberOfHurricanes(intSelectedIndex)

  'and display in label
  lblNumberOfHurricanes.Visible = True
  lblNumberOfHurricanes.Text = string.Format("The number of Hurricanes in the year {0} is {1}", strSelectedYEar, intNumhUUR)
End Sub

Answer 2

cboYear はドロップダウン リストですか。 cboYear.SelectedValue で文字列が得られると思います。