DataGridView.CellValuePushed Event

 

Occurs when the VirtualMode property of the DataGridView control is true and a cell value has changed and requires storage in the underlying data source.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Event CellValuePushed As DataGridViewCellValueEventHandler

Use this event in virtual mode to update a custom data store with user-specified data. Handle the CellValueNeeded event to retrieve values from the data store for display in the control.

For more information about virtual mode, see Virtual Mode in the Windows Forms DataGridView Control.

For more information about handling events, see NIB: Consuming Events.

The following code example handles the CellValuePushed event to store updates and new entries in a data store object. This example is part of a larger example available in the VirtualMode reference topic.

#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)

.NET Framework
Available since 2.0
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