DataGridView.RowsRemoved 事件
重要
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在从 DataGridView 中删除一行或多行时发生。
public:
event System::Windows::Forms::DataGridViewRowsRemovedEventHandler ^ RowsRemoved;C#
public event System.Windows.Forms.DataGridViewRowsRemovedEventHandler RowsRemoved;C#
public event System.Windows.Forms.DataGridViewRowsRemovedEventHandler? RowsRemoved;member this.RowsRemoved : System.Windows.Forms.DataGridViewRowsRemovedEventHandler Public Custom Event RowsRemoved As DataGridViewRowsRemovedEventHandler 下面的代码示例演示如何使用此事件更新 的 DataGridView余额列中的值。 此示例是 事件中提供的更大示例的 SelectionChanged 一部分。
C#
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
从 DataGridView 控件中删除行时，会降低后续行的索引号以进行补偿。
有关如何处理事件的详细信息，请参阅 处理和引发事件。
| 产品 | 版本 |
|---|---|
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9, 10 |
