Describes the version of data in a DataRow.
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.
Assembly: System.Data (in System.Data.dll)
|A new row.|
|Current rows including unchanged, new, and modified rows. By default, is set to CurrentRows.|
|A deleted row.|
|A current version of original data that has been modified (see ModifiedOriginal).|
|The original version of the data that was modified. (Although the data has since been modified, it is available as ModifiedCurrent).|
|Original rows including unchanged and deleted rows.|
|An unchanged row.|
The values are used either to retrieve a particular version of data from a DataRow, or to determine what versions exist.
You can use the Boolean operator Or with the values to get more than one version.
Private Sub DemonstrateRowState() Dim i As Integer ' Create a DataTable with one column. Dim dataTable As New DataTable("dataTable") Dim dataColumn As New DataColumn("dataColumn") dataTable.Columns.Add(dataColumn) ' Add ten rows. Dim dataRow As DataRow For i = 0 To 9 dataRow = dataTable.NewRow() dataRow("dataColumn") = "item " + i.ToString() dataTable.Rows.Add(dataRow) Next i dataTable.AcceptChanges() ' Create a DataView with the table. Dim dataView As New DataView(dataTable) ' Change one row's value: dataTable.Rows(1)("dataColumn") = "Hello" ' Add one row: dataRow = dataTable.NewRow() dataRow("dataColumn") = "World" dataTable.Rows.Add(dataRow) ' Set the RowStateFilter to display only Added and modified rows. dataView.RowStateFilter = _ DataViewRowState.Added Or DataViewRowState.ModifiedCurrent ' Print those rows. Output = "Hello" "World"; PrintView(dataView, "ModifiedCurrent and Added") ' Set filter to display on originals of modified rows. dataView.RowStateFilter = DataViewRowState.ModifiedOriginal PrintView(dataView, "ModifiedOriginal") ' Delete three rows. dataTable.Rows(1).Delete() dataTable.Rows(2).Delete() dataTable.Rows(3).Delete() ' Set the RowStateFilter to display only Added and modified rows. dataView.RowStateFilter = DataViewRowState.Deleted PrintView(dataView, "Deleted") 'Set filter to display only current. dataView.RowStateFilter = DataViewRowState.CurrentRows PrintView(dataView, "Current") ' Set filter to display only unchanged rows. dataView.RowStateFilter = DataViewRowState.Unchanged PrintView(dataView, "Unchanged") ' Set filter to display only original rows. dataView.RowStateFilter = DataViewRowState.OriginalRows PrintView(dataView, "OriginalRows") End Sub Private Sub PrintView(ByVal dataView As DataView, ByVal label As String) Console.WriteLine(ControlChars.Cr + label) Dim i As Integer For i = 0 To dataView.Count - 1 Console.WriteLine(dataView(i)("dataColumn")) Next i End Sub
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.