DataGridView.RowsAdded DataGridView.RowsAdded DataGridView.RowsAdded DataGridView.RowsAdded Event

定義

發生於新的資料列加入 DataGridView 之後。Occurs after a new row is added to the DataGridView.

public:
 event System::Windows::Forms::DataGridViewRowsAddedEventHandler ^ RowsAdded;
public event System.Windows.Forms.DataGridViewRowsAddedEventHandler RowsAdded;
member this.RowsAdded : System.Windows.Forms.DataGridViewRowsAddedEventHandler 
Public Custom Event RowsAdded As DataGridViewRowsAddedEventHandler 

範例

下列程式碼範例會處理RowsAdded事件,以遞增虛擬DataGridView中的資料列數目。The following code example handles the RowsAdded event to increment the number of rows in a virtual DataGridView. CellValueNeeded處理常式中會使用資料列數目,因此它知道何時要顯示空白資料格,與新資料列的初始化儲存格。The number of rows is used in the CellValueNeeded handler so it knows when to show a blank cell versus an initialized cell for a new row. 這個範例是VirtualMode參考主題中提供之較大範例的一部分。This example is part of a larger example available in the VirtualMode reference topic.

    void VirtualConnector::dataGridView1_NewRowNeeded
        (Object^ sender, DataGridViewRowEventArgs^ e)
    {
        newRowNeeded = true;
    }

    void VirtualConnector::dataGridView1_RowsAdded
        (Object^ sender, DataGridViewRowsAddedEventArgs^ e)
    {
        if (newRowNeeded)
        {
            newRowNeeded = false;
            numberOfRows = numberOfRows + 1;
        }
    }

#pragma region Data store maintance

    void VirtualConnector::dataGridView1_CellValueNeeded
        (Object^ sender, DataGridViewCellValueEventArgs^ e)
    {
        if (store->ContainsKey(e->RowIndex))
        {
            // Use the store if the e value has been modified 
            // and stored.            
            e->Value = gcnew Int32(store->default[e->RowIndex]); 
        }
        else if (newRowNeeded && e->RowIndex == numberOfRows)
        {
            if (dataGridView1->IsCurrentCellInEditMode)
            {
                e->Value = initialValue;
            }
            else
            {
                // Show a blank e if the cursor is just loitering
                // over(the) last row.
                e->Value = String::Empty;
            }
        }
        else
        {
            e->Value = e->RowIndex;
        }
    }

    void VirtualConnector::dataGridView1_CellValuePushed
        (Object^ sender, DataGridViewCellValueEventArgs^ e)
    {
        String^ value = e->Value->ToString();
        store[e->RowIndex] = Int32::Parse(value, 
            CultureInfo::CurrentCulture);
    }
#pragma endregion
bool newRowNeeded;
private void dataGridView1_NewRowNeeded(object sender,
    DataGridViewRowEventArgs e)
{
    newRowNeeded = true;
}

const int initialSize = 5000000;
int numberOfRows = initialSize;

private void dataGridView1_RowsAdded(object sender,
     DataGridViewRowsAddedEventArgs e)
{
    if (newRowNeeded)
    {
        newRowNeeded = false;
        numberOfRows = numberOfRows + 1;
    }
}

#region "data store maintance"
const int initialValue = -1;

private void dataGridView1_CellValueNeeded(object sender,
    DataGridViewCellValueEventArgs e)
{
    if (store.ContainsKey(e.RowIndex))
    {
        // Use the store if the e value has been modified 
        // and stored.            
        e.Value = store[e.RowIndex];
    }
    else if (newRowNeeded && e.RowIndex == numberOfRows)
    {
        if (dataGridView1.IsCurrentCellInEditMode)
        {
            e.Value = initialValue;
        }
        else
        {
            // Show a blank value if the cursor is just resting
            // on the last row.
            e.Value = String.Empty;
        }
    }
    else
    {
        e.Value = e.RowIndex;
    }
}

private void dataGridView1_CellValuePushed(object sender,
    DataGridViewCellValueEventArgs e)
{
    store.Add(e.RowIndex, int.Parse(e.Value.ToString()));
}
#endregion

private Dictionary<int, int> store = new Dictionary<int, int>();
    Dim newRowNeeded As Boolean

    Private Sub dataGridView1_NewRowNeeded(ByVal sender As Object, _
        ByVal e As DataGridViewRowEventArgs) _
        Handles dataGridView1.NewRowNeeded

        newRowNeeded = True
    End Sub

    Const initialSize As Integer = 5000000
    Dim numberOfRows As Integer = initialSize

    Private Sub dataGridView1_RowsAdded(ByVal sender As Object, _
        ByVal e As DataGridViewRowsAddedEventArgs) _
        Handles dataGridView1.RowsAdded

        If newRowNeeded Then
            newRowNeeded = False
            numberOfRows = numberOfRows + 1
        End If
    End Sub

#Region "data store maintance"
    Const initialValue As Integer = -1

    Private Sub dataGridView1_CellValueNeeded(ByVal sender As Object, _
        ByVal e As DataGridViewCellValueEventArgs) _
        Handles dataGridView1.CellValueNeeded

        If store.ContainsKey(e.RowIndex) Then
            ' Use the store if the e value has been modified 
            ' and stored.
            e.Value = store(e.RowIndex)
        ElseIf newRowNeeded AndAlso e.RowIndex = numberOfRows Then
            If dataGridView1.IsCurrentCellInEditMode Then
                e.Value = initialValue
            Else
                ' Show a blank value if the cursor is just resting
                ' on the last row.
                e.Value = String.Empty
            End If
        Else
            e.Value = e.RowIndex
        End If
    End Sub

    Private Sub dataGridView1_CellValuePushed(ByVal sender As Object, _
        ByVal e As DataGridViewCellValueEventArgs) _
        Handles dataGridView1.CellValuePushed

        store.Add(e.RowIndex, CInt(e.Value))

    End Sub
#End Region

    Dim store As System.Collections.Generic.Dictionary(Of Integer, Integer) = _
        New Dictionary(Of Integer, Integer)

備註

加入新的資料列時,不會自動排序控制項中的資料列。Rows in the control are not automatically sorted when new rows are added. 若要將新的資料列排序到正確的Sort位置,請RowsAdded在事件處理常式中呼叫方法。To sort new rows into their correct position, call the Sort method in a RowsAdded event handler.

當使用者使用新記錄的資料列來加入新的資料列時DataGridViewRowsAddedEventArgs.RowIndex ,此事件之處理常式中的值會等於新記錄之資料列新位置的索引,也就是一個大於剛加入的資料列。When the user adds a new row using the row for new records, the DataGridViewRowsAddedEventArgs.RowIndex value in the handler for this event is equal to the index of the new location of the row for new records, which is one greater than the row just added. 不過,當您以程式設計方式加入RowIndex資料列時,此值會是加入之第一個資料列的索引。When you add rows programmatically, however, the RowIndex value is the index of the first row added.

在虛擬模式中,此事件會在CellValuePushed事件之前發生,而且可用來在您的資料存放區中建立新的記錄,然後CellValuePushed您可以在事件處理常式中填入。In virtual mode, this event occurs before the CellValuePushed event and can be used to create new records in your data store that you can then populate in the CellValuePushed event handler.

如需如何處理事件的詳細資訊,請參閱處理和引發事件For more information about how to handle events, see Handling and Raising Events.

適用於

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