Assembly : System.Data (dans system.data.dll)
SyntaxePublic ReadOnly Property RowVersion As DataRowVersion
Dim instance As DataRowView Dim value As DataRowVersion value = instance.RowVersion
public DataRowVersion RowVersion { get; }
public: property DataRowVersion RowVersion { DataRowVersion get (); }
/** @property */
public DataRowVersion get_RowVersion ()
public function get RowVersion () : DataRowVersion
Valeur de la propriété
Une des valeurs de DataRowVersion. Les valeurs possibles pour la propriété RowVersion sont Default, Original, Current et Proposed.
NotesLa propriété RowStateFilter spécifie des paramètres DataRowState et DataRowVersion. Pour plus d'informations, consultez DataRowState, DataRowVersion et DataViewRowState.
ExempleL'exemple suivant utilise la propriété RowVersion pour déterminer l'état d'une ligne dans DataRowView.
Private Sub DemonstrateRowVersion() Dim i As Integer ' Create a DataTable with one column. Dim table As New DataTable("Table") Dim column As New DataColumn("Column") table.Columns.Add(column) ' Add ten rows. Dim row As DataRow For i = 0 To 9 row = table.NewRow() row("Column") = "item " + i.ToString() table.Rows.Add(row) Next i table.AcceptChanges() ' Create a DataView with the table. Dim view As New DataView(table) ' Change one row's value: table.Rows(1)("Column") = "Hello" ' Add one row: row = table.NewRow() row("Column") = "World" table.Rows.Add(row) ' Set the RowStateFilter to display only added and modified rows. view.RowStateFilter = _ DataViewRowState.Added Or DataViewRowState.ModifiedCurrent ' Print those rows. Output includes "Hello" and "World". PrintView(view, "ModifiedCurrent and Added") ' Set filter to display only originals of modified rows. view.RowStateFilter = DataViewRowState.ModifiedOriginal PrintView(view, "ModifiedOriginal") ' Delete three rows. table.Rows(1).Delete() table.Rows(2).Delete() table.Rows(3).Delete() ' Set the RowStateFilter to display only deleted rows. view.RowStateFilter = DataViewRowState.Deleted PrintView(view, "Deleted") ' Set filter to display only current rows. view.RowStateFilter = DataViewRowState.CurrentRows PrintView(view, "Current") ' Set filter to display only unchanged rows. view.RowStateFilter = DataViewRowState.Unchanged PrintView(view, "Unchanged") ' Set filter to display only original rows. ' Current values of unmodified rows are also returned. view.RowStateFilter = DataViewRowState.OriginalRows PrintView(view, "OriginalRows") End Sub Private Sub PrintView(ByVal view As DataView, ByVal label As String) Console.WriteLine(ControlChars.Cr + label) Dim i As Integer For i = 0 To view.Count - 1 Console.WriteLine(view(i)("Column")) Console.WriteLine("DataRowView.RowVersion: {0}", _ view(i).RowVersion) Next i End Sub
private static void DemonstrateRowVersion() { // Create a DataTable with one column. DataTable table = new DataTable("Table"); DataColumn column = new DataColumn("Column"); table.Columns.Add(column); // Add ten rows. DataRow row; for (int i = 0; i < 10; i++) { row = table.NewRow(); row["Column"] = "item " + i; table.Rows.Add(row); } table.AcceptChanges(); // Create a DataView with the table. DataView view = new DataView(table); // Change one row's value: table.Rows[1]["Column"] = "Hello"; // Add one row: row = table.NewRow(); row["Column"] = "World"; table.Rows.Add(row); // Set the RowStateFilter to display only added // and modified rows. view.RowStateFilter = DataViewRowState.Added | DataViewRowState.ModifiedCurrent; // Print those rows. Output includes "Hello" and "World". PrintView(view, "ModifiedCurrent and Added"); // Set filter to display only originals of modified rows. view.RowStateFilter = DataViewRowState.ModifiedOriginal; PrintView(view, "ModifiedOriginal"); // Delete three rows. table.Rows[1].Delete(); table.Rows[2].Delete(); table.Rows[3].Delete(); // Set the RowStateFilter to display only deleted rows. view.RowStateFilter = DataViewRowState.Deleted; PrintView(view, "Deleted"); // Set filter to display only current rows. view.RowStateFilter = DataViewRowState.CurrentRows; PrintView(view, "Current"); // Set filter to display only unchanged rows. view.RowStateFilter = DataViewRowState.Unchanged; PrintView(view, "Unchanged"); // Set filter to display only original rows. // Current values of unmodified rows are also returned. view.RowStateFilter = DataViewRowState.OriginalRows; PrintView(view, "OriginalRows"); } private static void PrintView(DataView view, string label) { Console.WriteLine("\n" + label); for (int i = 0; i < view.Count; i++) { Console.WriteLine(view[i]["Column"]); Console.WriteLine("DataViewRow.RowVersion: {0}", view[i].RowVersion); } }
Plates-formesWindows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile pour Pocket PC, Windows Mobile pour Smartphone, Windows Server 2003, Windows XP Édition Media Center, Windows XP Professionnel Édition x64, Windows XP SP2, Windows XP Starter Edition
Le .NET Framework ne prend pas en charge toutes les versions de chaque plate-forme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise.
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