OleDbCommand Konstruktor

Definisi

Ruang nama:

System.Data.OleDb

Rakitan:

System.Data.OleDb.dll

Paket:

System.Data.OleDb v9.0.0-preview.3.24172.9

Menginisialisasi instans baru kelas OleDbCommand.

Overload

OleDbCommand()	Menginisialisasi instans baru kelas OleDbCommand.
OleDbCommand(String)	Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri.
OleDbCommand(String, OleDbConnection)	Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri dan OleDbConnection.
OleDbCommand(String, OleDbConnection, OleDbTransaction)	Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri, OleDbConnection, dan Transaction.

OleDbCommand()

Sumber:

OleDbCommand.cs

Menginisialisasi instans baru kelas OleDbCommand.

public:
 OleDbCommand();

public OleDbCommand ();

Public Sub New ()

Contoh

Contoh berikut membuat OleDbCommand dan mengatur beberapa propertinya.

public void CreateReader(string connectionString, string queryString)
{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    {
        OleDbCommand command = new OleDbCommand(queryString, connection);
        command.CommandTimeout = 20;

        connection.Open();
        OleDbDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            Console.WriteLine(reader[0].ToString());
        }
        reader.Close();
    }
}

Public Sub CreateReader(ByVal connectionString As String, _
    ByVal queryString As String)

    Using connection As New OleDbConnection(connectionString)
        Dim command As New OleDbCommand(queryString, connection)
        command.CommandTimeout = 20

        connection.Open()

        Dim reader As OleDbDataReader = command.ExecuteReader()
        While reader.Read()
            Console.WriteLine(reader(0).ToString())
        End While
        reader.Close()
    End Using
End Sub

Keterangan

Konstruktor dasar menginisialisasi semua bidang ke nilai defaultnya. Tabel berikut ini memperlihatkan nilai properti awal untuk instans OleDbCommand.

Properti	Nilai Awal
CommandText	string kosong ("")
CommandTimeout	30
CommandType	Text
Connection	null

Lihat juga

• Bekerja dengan Perintah

OleDbCommand(String)

Sumber:

OleDbCommand.cs

Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri.

public:
 OleDbCommand(System::String ^ cmdText);

public OleDbCommand (string? cmdText);

new System.Data.OleDb.OleDbCommand : string -> System.Data.OleDb.OleDbCommand

Public Sub New (cmdText As String)

Parameter

cmdText

String

Teks kueri.

Contoh

Contoh berikut membuat OleDbCommand dan mengatur beberapa propertinya.

public void CreateMyOleDbCommand()
{
   string queryString = "SELECT * FROM Categories ORDER BY CategoryID";
   OleDbCommand command = new OleDbCommand(queryString);
   command.CommandTimeout = 20;
}

Public Sub CreateMyOleDbCommand()
    Dim queryString As String = "SELECT * FROM Categories ORDER BY CategoryID"
    Dim command As New OleDbCommand(queryString)
    command.CommandTimeout = 20
End Sub

Keterangan

Tabel berikut ini memperlihatkan nilai properti awal untuk instans OleDbCommand.

Properti	Nilai Awal
CommandText	cmdText
CommandTimeout	30
CommandType	Text
Connection	null

Lihat juga

• Bekerja dengan Perintah

OleDbCommand(String, OleDbConnection)

Sumber:

OleDbCommand.cs

Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri dan OleDbConnection.

public:
 OleDbCommand(System::String ^ cmdText, System::Data::OleDb::OleDbConnection ^ connection);

public OleDbCommand (string? cmdText, System.Data.OleDb.OleDbConnection? connection);

new System.Data.OleDb.OleDbCommand : string * System.Data.OleDb.OleDbConnection -> System.Data.OleDb.OleDbCommand

Public Sub New (cmdText As String, connection As OleDbConnection)

Parameter

cmdText

String

Teks kueri.

connection

OleDbConnection

Yang OleDbConnection mewakili koneksi ke sumber data.

Contoh

Contoh berikut membuat OleDbCommand dan mengatur beberapa propertinya.

public void CreateReader(string connectionString, string queryString)
{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    {
        OleDbCommand command = new OleDbCommand(queryString, connection);
        command.CommandTimeout = 20;

        connection.Open();
        OleDbDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            Console.WriteLine(reader[0].ToString());
        }
        reader.Close();
    }
}

Public Sub CreateReader(ByVal connectionString As String, _
    ByVal queryString As String)

    Using connection As New OleDbConnection(connectionString)
        Dim command As New OleDbCommand(queryString, connection)
        command.CommandTimeout = 20

        connection.Open()

        Dim reader As OleDbDataReader = command.ExecuteReader()
        While reader.Read()
            Console.WriteLine(reader(0).ToString())
        End While
        reader.Close()
    End Using
End Sub

Keterangan

Tabel berikut ini memperlihatkan nilai properti awal untuk instans OleDbCommand.

Properti	Nilai Awal
CommandText	cmdText
CommandTimeout	30
CommandType	Text
Connection	OleDbConnection Baru yang merupakan nilai untuk connection parameter .

Anda dapat mengubah nilai untuk salah satu parameter ini dengan mengatur properti terkait.

Lihat juga

• Bekerja dengan Perintah

OleDbCommand(String, OleDbConnection, OleDbTransaction)

Sumber:

OleDbCommand.cs

Menginisialisasi instans OleDbCommand baru kelas dengan teks kueri, OleDbConnection, dan Transaction.

public:
 OleDbCommand(System::String ^ cmdText, System::Data::OleDb::OleDbConnection ^ connection, System::Data::OleDb::OleDbTransaction ^ transaction);

public OleDbCommand (string? cmdText, System.Data.OleDb.OleDbConnection? connection, System.Data.OleDb.OleDbTransaction? transaction);

new System.Data.OleDb.OleDbCommand : string * System.Data.OleDb.OleDbConnection * System.Data.OleDb.OleDbTransaction -> System.Data.OleDb.OleDbCommand

Public Sub New (cmdText As String, connection As OleDbConnection, transaction As OleDbTransaction)

Parameter

cmdText

String

Teks kueri.

connection

OleDbConnection

Yang OleDbConnection mewakili koneksi ke sumber data.

transaction

OleDbTransaction

Transaksi tempat OleDbCommand eksekusi.

Contoh

Contoh berikut membuat OleDbCommand dan mengatur beberapa propertinya.

public void CreateReader(string connectionString, string queryString)
{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    {
        OleDbCommand command = new OleDbCommand(queryString, connection);
        command.CommandTimeout = 20;

        connection.Open();
        OleDbDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            Console.WriteLine(reader[0].ToString());
        }
        reader.Close();
    }
}

Public Sub CreateReader(ByVal connectionString As String, _
    ByVal queryString As String)

    Using connection As New OleDbConnection(connectionString)
        Dim command As New OleDbCommand(queryString, connection)
        command.CommandTimeout = 20

        connection.Open()

        Dim reader As OleDbDataReader = command.ExecuteReader()
        While reader.Read()
            Console.WriteLine(reader(0).ToString())
        End While
        reader.Close()
    End Using
End Sub

Keterangan

Tabel berikut ini memperlihatkan nilai properti awal untuk instans OleDbCommand.

Properti	Nilai Awal
CommandText	cmdText
CommandTimeout	30
CommandType	Text
Connection	OleDbConnection Baru yang merupakan nilai untuk connection parameter .

Anda dapat mengubah nilai untuk salah satu parameter ini dengan mengatur properti terkait.

Lihat juga

• Bekerja dengan Perintah