Méthode SqlCeResultSet.Delete
Supprime l'enregistrement actif de la source de données sur le serveur.
Espace de noms : System.Data.SqlServerCe
Assembly : System.Data.SqlServerCe (en System.Data.SqlServerCe.dll)
Syntaxe
'Déclaration
<SecurityCriticalAttribute> _
<SecurityTreatAsSafeAttribute> _
<SecurityPermissionAttribute(SecurityAction.Assert, UnmanagedCode := True)> _
Public Sub Delete
'Utilisation
Dim instance As SqlCeResultSet
instance.Delete()
[SecurityCriticalAttribute]
[SecurityTreatAsSafeAttribute]
[SecurityPermissionAttribute(SecurityAction.Assert, UnmanagedCode = true)]
public void Delete()
[SecurityCriticalAttribute]
[SecurityTreatAsSafeAttribute]
[SecurityPermissionAttribute(SecurityAction::Assert, UnmanagedCode = true)]
public:
void Delete()
[<SecurityCriticalAttribute>]
[<SecurityTreatAsSafeAttribute>]
[<SecurityPermissionAttribute(SecurityAction.Assert, UnmanagedCode = true)>]
member Delete : unit -> unit
public function Delete()
Notes
L'appel à cette méthode n'affecte pas la position actuelle de SqlCeResultSet.
Cette méthode lève InvalidOperationException si elle est appelée sur un lecteur non modifiable ou si le lecteur n'est pas positionné sur un enregistrement valide.
Exemples
L'exemple suivant montre comment supprimer un enregistrement de SqlCeResultSet.
Dim conn As SqlCeConnection = Nothing
Try
File.Delete("Test.sdf")
Dim engine As New SqlCeEngine("Data Source = Test.sdf")
engine.CreateDatabase()
conn = New SqlCeConnection("Data Source = Test.sdf")
conn.Open()
Dim cmd As SqlCeCommand = conn.CreateCommand()
cmd.CommandText = "CREATE TABLE myTable (col1 INT)"
cmd.ExecuteNonQuery()
cmd.CommandText = "SELECT * FROM myTable"
Dim rs As SqlCeResultSet = cmd.ExecuteResultSet(ResultSetOptions.Updatable Or ResultSetOptions.Scrollable)
Dim rec As SqlCeUpdatableRecord = rs.CreateRecord()
' Insert 10 records
'
Dim i As Integer
For i = 0 To 9
rec.SetInt32(0, i)
rs.Insert(rec)
Next i
' Update the 5th record
'
If True = rs.ReadAbsolute(5) Then
rs.SetInt32(0, 55)
rs.Update()
End If
' Delete the 2nd record
'
If True = rs.ReadAbsolute(2) Then
rs.Delete()
End If
Catch e As Exception
MessageBox.Show(e.Message)
Finally
conn.Close()
End Try
SqlCeConnection conn = null;
try
{
File.Delete("Test.sdf");
SqlCeEngine engine = new SqlCeEngine("Data Source = Test.sdf");
engine.CreateDatabase();
conn = new SqlCeConnection("Data Source = Test.sdf");
conn.Open();
SqlCeCommand cmd = conn.CreateCommand();
cmd.CommandText = "CREATE TABLE myTable (col1 INT)";
cmd.ExecuteNonQuery();
cmd.CommandText = "SELECT * FROM myTable";
SqlCeResultSet rs = cmd.ExecuteResultSet(ResultSetOptions.Updatable |
ResultSetOptions.Scrollable);
SqlCeUpdatableRecord rec = rs.CreateRecord();
// Insert 10 records
//
for (int i = 0; i < 10; i++)
{
rec.SetInt32(0, i);
rs.Insert(rec);
}
// Update the 5th record
//
if (true == rs.ReadAbsolute(5))
{
rs.SetInt32(0, 55);
rs.Update();
}
// Delete the 2nd record
//
if (true == rs.ReadAbsolute(2))
{
rs.Delete();
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
conn.Close();
}