SqlBatch.ExecuteReader Metode

Definisi

Ruang nama:: Microsoft.Data.SqlClient

Rakitan:: Microsoft.Data.SqlClient.dll

Paket:: Microsoft.Data.SqlClient v7.1.0

Paket:: Microsoft.Data.SqlClient v5.2.0

Paket:: Microsoft.Data.SqlClient v6.0.2

Paket:: Microsoft.Data.SqlClient v6.1.3

Paket:: Microsoft.Data.SqlClient v7.0.3

Penting

Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Overload

Nama	Deskripsi
ExecuteReader()	Commands Mengirim ke Connection dan membangun SqlDataReader.
ExecuteReader(CommandBehavior)	Commands Mengirim ke Connection dan membangun SqlDataReader.

ExecuteReader()

Sumber:: SqlBatch.cs

Commands Mengirim ke Connection dan membangun SqlDataReader.

public:
 Microsoft::Data::SqlClient::SqlDataReader ^ ExecuteReader();

public Microsoft.Data.SqlClient.SqlDataReader ExecuteReader();

member this.ExecuteReader : unit -> Microsoft.Data.SqlClient.SqlDataReader

override this.ExecuteReader : unit -> Microsoft.Data.SqlClient.SqlDataReader

Public Function ExecuteReader () As SqlDataReader

Mengembalikan

SqlDataReader

Contoh

Contoh berikut membuat SqlConnection dan SqlBatch, lalu menambahkan beberapa SqlBatchCommand objek ke batch. Kemudian menjalankan batch, membuat SqlDataReader. Contohnya membaca hasil perintah batch, menulisnya ke konsol. Akhirnya, contoh menutup SqlDataReader dan kemudian SqlConnection saat using blok jatuh dari cakupan.

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
        string str = "Data Source=(local);Initial Catalog=Northwind;"
        + "Integrated Security=SSPI;Encrypt=False";
        RunBatch(str);
    }

    static void RunBatch(string connString)
    {
        using var connection = new SqlConnection(connString);
        connection.Open();

        using var batch = new SqlBatch(connection);

        const int count = 10;
        const string parameterName = "parameter";
        for (int i = 0; i < count; i++)
        {
            var batchCommand = new SqlBatchCommand($"SELECT @{parameterName} as value");
            batchCommand.Parameters.Add(new SqlParameter(parameterName, i));
            batch.BatchCommands.Add(batchCommand);
        }

        var results = new List<int>(count);
        using (SqlDataReader reader = batch.ExecuteReader())
        {
            do
            {
                while (reader.Read())
                {
                    results.Add(reader.GetFieldValue<int>(0));
                }
            } while (reader.NextResult());
        }
        Console.WriteLine(string.Join(", ", results));
    }
}

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
        string str = "Data Source=(local);Initial Catalog=Northwind;"
                   + "Integrated Security=SSPI;Encrypt=False";
        RunBatch(str);
    }

    static void RunBatch(string connString)
    {
        using var connection = new SqlConnection(connString);
        connection.Open();

        using var batch = new SqlBatch(connection);

        const int count = 10;
        const string parameterName = "parameter";
        for (int i = 0; i < count; i++)
        {
            var batchCommand = new SqlBatchCommand($"SELECT @{parameterName} as value");
            batchCommand.Parameters.Add(new SqlParameter(parameterName, i));
            batch.BatchCommands.Add(batchCommand);
        }

        var results = new List<int>(count);
        using (SqlDataReader reader = batch.ExecuteReader())
        {
            do
            {
                while (reader.Read())
                {
                    results.Add(reader.GetFieldValue<int>(0));
                }
            } while (reader.NextResult());
        }
        Console.WriteLine(string.Join(", ", results));
    }
}

Berlaku untuk

ExecuteReader(CommandBehavior)

Commands Mengirim ke Connection dan membangun SqlDataReader.

public:
 Microsoft::Data::SqlClient::SqlDataReader ^ ExecuteReader(System::Data::CommandBehavior behavior);

public Microsoft.Data.SqlClient.SqlDataReader ExecuteReader(System.Data.CommandBehavior behavior);

member this.ExecuteReader : System.Data.CommandBehavior -> Microsoft.Data.SqlClient.SqlDataReader

override this.ExecuteReader : System.Data.CommandBehavior -> Microsoft.Data.SqlClient.SqlDataReader

Public Function ExecuteReader (behavior As CommandBehavior) As SqlDataReader

Parameter

behavior: CommandBehavior

Instans CommandBehavior, menentukan opsi untuk eksekusi batch dan pengambilan data. Hanya SequentialAccess dan CloseConnection didukung pada tingkat batch.

Mengembalikan

SqlDataReader

Contoh

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
        string str = "Data Source=(local);Initial Catalog=Northwind;"
                   + "Integrated Security=SSPI;Encrypt=False";
        RunBatch(str);
    }

    static void RunBatch(string connString)
    {
        using var connection = new SqlConnection(connString);
        connection.Open();

        using var batch = new SqlBatch(connection);

        const int count = 10;
        const string parameterName = "parameter";
        for (int i = 0; i < count; i++)
        {
            var batchCommand = new SqlBatchCommand($"SELECT @{parameterName} as value");
            batchCommand.Parameters.Add(new SqlParameter(parameterName, i));
            batch.BatchCommands.Add(batchCommand);
        }

        var results = new List<int>(count);
        using (SqlDataReader reader = batch.ExecuteReader(CommandBehavior.CloseConnection))
        {
            do
            {
                while (reader.Read())
                {
                    results.Add(reader.GetFieldValue<int>(0));
                }
            } while (reader.NextResult());
        }
        Console.WriteLine(string.Join(", ", results));
    }
}

Berlaku untuk