Describes the version of a DataRow.

[Visual Basic]
<Serializable>
Public Enum DataRowVersion
[C#]
[Serializable]
public enum DataRowVersion
[C++]
[Serializable]
__value public enum DataRowVersion
[JScript]
public
   Serializable
enum DataRowVersion

Remarks

The DataRowVersion values are used when retrieving the value found in a DataRow using Item or the GetChildRows of the DataRow object.

The DataRowVersion informs you what version of a DataRow exists. Versions change under the following circumstances:

• After calling the DataRow object's BeginEdit method, if you change the value, the Current and Proposed values become available.
• After calling the DataRow object's CancelEdit method, the Proposed value is deleted.
• After calling the DataRow object's EndEdit method, the Proposed value becomes the Current value.
• After calling the DataRow object's AcceptChanges method, the Original value becomes identical to the Current value.
• After calling the DataTable object's AcceptChanges method, the Original value becomes identical to the Current value.
• After calling the DataRow object's RejectChanges, the Proposed value is discarded, and the version becomes Current.

Members

Example

[Visual Basic] The following example checks the DataRowVersion of a DataRow before invoking the AcceptChanges method.

[Visual Basic] 
Private Sub CheckVersionBeforeAccept()
   Dim r As DataRow
   Dim t As DataTable
   t = CType(DataGrid1.DataSource, DataTable)
   ' The user must click a cell to edit in the DataGrid control.
   r = t.Rows(DataGrid1.CurrentCell.RowNumber)
   r.BeginEdit
   ' Change the value of column 1 in the row.
   r(1) = Edit1.Text
   ' Compare the proposed version with the current.
   If r.HasVersion(datarowversion.Proposed) Then
      If r(1, DataRowVersion.Current) Is r(1, DataRowversion.Proposed) Then
         MessageBox.Show("The original and the proposed are the same")
         r.CancelEdit
         Exit Sub
      Else
         r.AcceptChanges
         ' Print the original 
      End If
   Else
      MessageBox.Show("No new values proposed")
   End If
End Sub

[C#, C++, JScript] No example is available for C#, C++, or JScript. To view a Visual Basic example, click the Language Filter button in the upper-left corner of the page.

Requirements

Namespace: System.Data

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework - Windows CE .NET

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

See Also

System.Data Namespace | AcceptChanges | BeginEdit | EndEdit | Item | RejectChanges