Méthode SqlCeDataReader.Close
Ferme l'objet SqlCeDataReader.
Espace de noms : System.Data.SqlServerCe
Assembly : System.Data.SqlServerCe (en System.Data.SqlServerCe.dll)
Syntaxe
'Déclaration
Public Overrides Sub Close
'Utilisation
Dim instance As SqlCeDataReader
instance.Close()
public override void Close()
public:
virtual void Close() override
abstract Close : unit -> unit
override Close : unit -> unit
public override function Close()
Implémente
Notes
Pour pouvoir utiliser le SqlCeConnection associé à d'autres fins, vous devez d'abord appeler explicitement la méthode Close quand vous avez fini d'utiliser SqlCeDataReader ; cependant, vous pouvez créer plusieurs lecteurs dans la même connexion.
Exemples
L'exemple suivant crée un SqlCeConnection, un SqlCeCommand et SqlCeDataReader. L'exemple lit les données et les écrit dans la console. Pour terminer, l'exemple ferme SqlCeDataReader, puis SqlCeConnection.
Dim conn As SqlCeConnection = Nothing
Dim cmd As SqlCeCommand = Nothing
Dim rdr As SqlCeDataReader = Nothing
Try
' Open the connection and create a SQL command
'
conn = New SqlCeConnection("Data Source = AdventureWorks.sdf")
conn.Open()
cmd = New SqlCeCommand("SELECT * FROM DimEmployee", conn)
rdr = cmd.ExecuteReader()
' Iterate through the results
'
While rdr.Read()
Dim employeeID As Integer = rdr.GetInt32(0) ' or: rdr["EmployeeKey"];
Dim lastName As String = rdr.GetString(5) ' or: rdr["FirstName"];
End While
' Always dispose data readers and commands as soon as practicable
'
rdr.Close()
cmd.Dispose()
Finally
' Close the connection when no longer needed
'
conn.Close()
End Try
SqlCeConnection conn = null;
SqlCeCommand cmd = null;
SqlCeDataReader rdr = null;
try
{
// Open the connection and create a SQL command
//
conn = new SqlCeConnection("Data Source = AdventureWorks.sdf");
conn.Open();
cmd = new SqlCeCommand("SELECT * FROM DimEmployee", conn);
rdr = cmd.ExecuteReader();
// Iterate through the results
//
while (rdr.Read())
{
int employeeID = rdr.GetInt32(0); // or: rdr["EmployeeKey"];
string lastName = rdr.GetString(5); // or: rdr["FirstName"];
}
// Always dispose data readers and commands as soon as practicable
//
rdr.Close();
cmd.Dispose();
}
finally
{
// Close the connection when no longer needed
//
conn.Close();
}