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DataRow.HasVersion Method

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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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