DataGridView.CellValueChanged DataGridView.CellValueChanged DataGridView.CellValueChanged DataGridView.CellValueChanged Event

定義

セルの値が変更したときに発生します。Occurs when the value of a cell changes.

public:
 event System::Windows::Forms::DataGridViewCellEventHandler ^ CellValueChanged;
public event System.Windows.Forms.DataGridViewCellEventHandler CellValueChanged;
member this.CellValueChanged : System.Windows.Forms.DataGridViewCellEventHandler 
Public Custom Event CellValueChanged As DataGridViewCellEventHandler 

次のコード例は、使用する方法を示します、CellValueChangedの分散列の値を更新するイベント、DataGridViewします。The following code example demonstrates how to use the CellValueChanged event to update the values in a balance column of a DataGridView. この例は例で使用できる、SelectionChangedイベント。This example is part of a larger example available in the SelectionChanged event.

private void DataGridView1_CellValueChanged(
    object sender, DataGridViewCellEventArgs e)
{
    // Update the balance column whenever the value of any cell changes.
    UpdateBalance();
}

private void DataGridView1_RowsRemoved(
    object sender, DataGridViewRowsRemovedEventArgs e)
{
    // Update the balance column whenever rows are deleted.
    UpdateBalance();
}

private void UpdateBalance()
{
    int counter;
    int balance;
    int deposit;
    int withdrawal;

    // Iterate through the rows, skipping the Starting Balance row.
    for (counter = 1; counter < (DataGridView1.Rows.Count - 1);
        counter++)
    {
        deposit = 0;
        withdrawal = 0;
        balance = int.Parse(DataGridView1.Rows[counter - 1]
            .Cells["Balance"].Value.ToString());

        if (DataGridView1.Rows[counter].Cells["Deposits"].Value != null)
        {
            // Verify that the cell value is not an empty string.
            if (DataGridView1.Rows[counter]
                .Cells["Deposits"].Value.ToString().Length != 0)
            {
                deposit = int.Parse(DataGridView1.Rows[counter]
                    .Cells["Deposits"].Value.ToString());
            }
        }

        if (DataGridView1.Rows[counter].Cells["Withdrawals"].Value != null)
        {
            if (DataGridView1.Rows[counter]
                .Cells["Withdrawals"].Value.ToString().Length != 0)
            {
                withdrawal = int.Parse(DataGridView1.Rows[counter]
                    .Cells["Withdrawals"].Value.ToString());
            }
        }
        DataGridView1.Rows[counter].Cells["Balance"].Value =
            (balance + deposit + withdrawal).ToString();
    }
}
Private Sub CellValueChanged(ByVal sender As Object, _
    ByVal e As DataGridViewCellEventArgs) _
    Handles DataGridView1.CellValueChanged

    ' Update the balance column whenever the values of any cell changes.
    UpdateBalance()
End Sub

Private Sub RowsRemoved(ByVal sender As Object, _
    ByVal e As DataGridViewRowsRemovedEventArgs) _
    Handles DataGridView1.RowsRemoved

    ' Update the balance column whenever rows are deleted.
    UpdateBalance()
End Sub

Private Sub UpdateBalance()
    Dim counter As Integer
    Dim balance As Integer
    Dim deposit As Integer
    Dim withdrawal As Integer

    ' Iterate through the rows, skipping the Starting Balance Row.
    For counter = 1 To (DataGridView1.Rows.Count - 2)
        deposit = 0
        withdrawal = 0
        balance = Integer.Parse(DataGridView1.Rows(counter - 1) _
            .Cells("Balance").Value.ToString())

        If Not DataGridView1.Rows(counter) _
            .Cells("Deposits").Value Is Nothing Then

            ' Verify that the cell value is not an empty string.
            If Not DataGridView1.Rows(counter) _
                .Cells("Deposits").Value.ToString().Length = 0 Then
                deposit = Integer.Parse(DataGridView1.Rows(counter) _
                    .Cells("Deposits").Value.ToString())
            End If
        End If

        If Not DataGridView1.Rows(counter) _
            .Cells("Withdrawals").Value Is Nothing Then
            If Not DataGridView1.Rows(counter) _
                .Cells("Withdrawals").Value.ToString().Length = 0 Then
                withdrawal = Integer.Parse(DataGridView1.Rows(counter) _
                    .Cells("Withdrawals").Value.ToString())
            End If
        End If

        DataGridView1.Rows(counter).Cells("Balance").Value = _
            (balance + deposit + withdrawal).ToString()
    Next
End Sub

注釈

DataGridView.CellValueChangedイベントは、ユーザー指定の値がコミットされときに、発生します。 フォーカスがセルから離れたときに通常発生します。The DataGridView.CellValueChanged event occurs when the user-specified value is committed, which typically occurs when focus leaves the cell.

ただし、チェック ボックスのセルの場合、変更をすぐに処理するためには通常たいです。In the case of check box cells, however, you will typically want to handle the change immediately. セルがクリックされたときに、変更をコミットするに処理する必要があります、DataGridView.CurrentCellDirtyStateChangedイベント。To commit the change when the cell is clicked, you must handle the DataGridView.CurrentCellDirtyStateChanged event. ハンドラーで、現在のセルがチェック ボックス セルの場合を呼び出す、DataGridView.CommitEditメソッドを渡します、Commit値。In the handler, if the current cell is a check box cell, call the DataGridView.CommitEdit method and pass in the Commit value.

セルの値が変更されたときに、コントロール内の行は自動的に並べ替えられません。Rows in the control are not automatically sorted when a cell value is changed. ユーザーがセルに変更する際は、コントロールを並べ替えに呼び出し、Sortメソッド、CellValueChangedイベント ハンドラー。To sort the control when the user modifies a cell, call the Sort method in a CellValueChanged event handler.

イベントを処理する方法の詳細については、次を参照してください。処理とイベントの発生します。For more information about how to handle events, see Handling and Raising Events.

適用対象

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