SqlCeDataReader.Close 메서드
SqlCeDataReader 개체를 닫습니다.
네임스페이스: System.Data.SqlServerCe
어셈블리: System.Data.SqlServerCe(System.Data.SqlServerCe.dll)
구문
‘선언
Public Overrides Sub Close
‘사용 방법
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()
구현
주의
연관된 SqlCeConnection을 임의의 용도로 사용하려면 우선 SqlCeDataReader를 사용한 다음 Close 메서드를 명시적으로 호출해야 합니다. 그러나 같은 연결에서 여러 판독기를 만들 수는 있습니다.
예
다음 예제에서는 SqlCeConnection, SqlCeCommand, SqlCeDataReader 등을 만듭니다. 이 예제에서는 데이터를 읽어서 콘솔에 씁니다. 마지막으로 SqlCeDataReader를 닫은 후 SqlCeConnection을 닫습니다.
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();
}