SqlBatch.ExecuteReader 方法

定义

命名空间:: Microsoft.Data.SqlClient

程序集:: Microsoft.Data.SqlClient.dll

程序包:: Microsoft.Data.SqlClient v7.1.0

程序包:: Microsoft.Data.SqlClient v5.2.0

程序包:: Microsoft.Data.SqlClient v6.0.2

程序包:: Microsoft.Data.SqlClient v6.1.3

程序包:: Microsoft.Data.SqlClient v7.0.3

重要

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重载

名称	说明
ExecuteReader()	将 Commands 它发送到 Connection 并生成一个 SqlDataReader。
ExecuteReader(CommandBehavior)	将 Commands 它发送到 Connection 并生成一个 SqlDataReader。

ExecuteReader()

Source:: SqlBatch.cs

将 Commands 它发送到 Connection 并生成一个 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

SqlDataReader

示例

以下示例创建一个和一个SqlConnection SqlBatch，然后将多个SqlBatchCommand对象添加到批处理。然后，它会执行批处理，并创建一个 SqlDataReader。该示例读取批处理命令的结果，并将其写入控制台。最后，该示例关闭该示例，然后SqlConnection关闭SqlDataReader块using的范围。

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));
    }
}

适用于

ExecuteReader(CommandBehavior)

将 Commands 它发送到 Connection 并生成一个 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

参数

behavior: CommandBehavior

一个实例 CommandBehavior，指定用于批处理执行和数据检索的选项。 CloseConnection仅在SequentialAccess批处理级别受支持。

SqlDataReader

示例

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));
    }
}

适用于

SqlBatch.ExecuteReader 方法

定义

重载

ExecuteReader()

返回

示例

适用于

ExecuteReader(CommandBehavior)

参数

返回

示例

适用于