DataGridView.RowsAdded Zdarzenie

Definicja

Występuje po dodaniu nowego wiersza do DataGridView .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 

Typ zdarzenia

DataGridViewRowsAddedEventHandler

Przykłady

Poniższy przykład kodu obsługuje zdarzenie, RowsAdded Aby zwiększyć liczbę wierszy w wirtualnej DataGridView .The following code example handles the RowsAdded event to increment the number of rows in a virtual DataGridView. Liczba wierszy jest używana w programie CellValueNeeded obsługi, więc wie, kiedy pokazać pustą komórkę w stosunku do komórki zainicjowanej dla nowego wiersza.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. Ten przykład jest częścią większego przykładu dostępnego w VirtualMode temacie Reference.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)

Uwagi

Wiersze w formancie nie są automatycznie sortowane po dodaniu nowych wierszy.Rows in the control are not automatically sorted when new rows are added. Aby posortować nowe wiersze w ich prawidłowej pozycji, wywołaj Sort metodę w programie RowsAdded obsługi zdarzeń.To sort new rows into their correct position, call the Sort method in a RowsAdded event handler.

Gdy użytkownik dodaje nowy wiersz przy użyciu wiersza dla nowych rekordów, DataGridViewRowsAddedEventArgs.RowIndex wartość w obsłudze dla tego zdarzenia jest równa indeksowi nowej lokalizacji wiersza dla nowych rekordów, który jest taki sam jak dodany wiersz.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. Gdy program programowo dodaje wiersze, RowIndex wartość jest indeksem pierwszego dodanego wiersza.When you add rows programmatically, however, the RowIndex value is the index of the first row added.

W trybie wirtualnym to zdarzenie występuje przed CellValuePushed zdarzeniem i może służyć do tworzenia nowych rekordów w magazynie danych, które można następnie wypełnić w programie CellValuePushed obsługi zdarzeń.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.

Aby uzyskać więcej informacji o sposobie obsługi zdarzeń, zobacz Obsługa iwywoływanie zdarzeń.For more information about how to handle events, see Handling and Raising Events.

Dotyczy

Zobacz też