HasVersion Method

DataRow.HasVersion Method (DataRowVersion)

 

Gets a value that indicates whether a specified version exists.

Namespace:   System.Data
Assembly:  System.Data (in System.Data.dll)

public bool HasVersion(
	DataRowVersion version
)

Parameters

version
Type: System.Data.DataRowVersion

One of the DataRowVersion values that specifies the row version.

Return Value

Type: System.Boolean

true if the version exists; otherwise, false.

See the BeginEdit method for more information.

The following example uses the HasVersion method to determine whether the current value of a column and the proposed value are the same. If so, the edit is canceled. Otherwise, the AcceptChanges method is called to end the edit.

Private Sub CheckVersionBeforeAccept()
    ' Assuming the DataGrid is bound to a DataTable.
    Dim table As DataTable = CType(DataGrid1.DataSource, DataTable)
    Dim row As DataRow = table.Rows(DataGrid1.CurrentCell.RowNumber)
    row.BeginEdit
    row(1) = Edit1.Text
    If row.HasVersion(datarowversion.Proposed) Then
       If row(1, DataRowVersion.Current) Is _
            row(1, DataRowversion.Proposed) Then
          Console.WriteLine("The original and the proposed are the same")
          row.CancelEdit
          Exit Sub
       Else
          row.AcceptChanges
       End If
    Else
       Console.WriteLine("No new values proposed")
    End If
End Sub

.NET Framework
Available since 1.1
Return to top
Show:
© 2016 Microsoft