DataGridView.CellValueChanged 事件 (System.Windows.Forms)

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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

下面的代码示例演示如何使用 CellValueChanged 事件更新一个 DataGridView 平衡列中的值。此示例是事件 SelectionChanged 中可用的较大示例的一部分。


   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()
End Sub
    
     当用户
     
      DataGridView.CellValueChanged
     
     指定的值提交时发生该事件，通常在焦点离开单元格时发生。
    
    
     但是，对于复选框单元格，通常希望立即处理更改。 若要在单击单元格时提交更改，必须处理该
     
      DataGridView.CurrentCellDirtyStateChanged
     
     事件。 在处理程序中，如果当前单元格是复选框单元格，请调用
     
      DataGridView.CommitEdit
     
     该方法并传入
     
      Commit
     
     值。
    
    
     更改单元格值时，控件中的行不会自动排序。 若要在用户修改单元格时对控件进行排序，请调用
     
      Sort
     
     事件处理程序中的
     
      CellValueChanged
     
     方法。
    
    
     有关如何处理事件的详细信息，请参阅
     
      处理和引发事件
     
     。