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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

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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