SqlCommand.Connection Property

 

Gets or sets the SqlConnection used by this instance of the SqlCommand.

Namespace:   System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)

public SqlConnection Connection { get; set; }

Property Value

Type: System.Data.SqlClient.SqlConnection

The connection to a data source. The default value is null.

Exception Condition
InvalidOperationException

The Connection property was changed while the command was enlisted in a transaction..

If the command is enlisted in an existing transaction, and the connection is changed, trying to execute the command will throw an InvalidOperationException.

If the Transaction property is not null and the transaction has already been committed or rolled back, Transaction is set to null.

The following example creates a SqlCommand and sets some of its properties.

private static void CreateCommand(string queryString,
    string connectionString)
{
    using (SqlConnection connection = new SqlConnection(
               connectionString))
    {
        SqlCommand command = new SqlCommand();
        command.Connection = connection;
        command.CommandTimeout = 15;
        command.CommandType = CommandType.Text;
        command.CommandText = queryString;

        connection.Open();
        SqlDataReader reader = command.ExecuteReader();
        while (reader.Read())
        {
            Console.WriteLine(String.Format("{0}, {1}",
                reader[0], reader[1]));
        }
    }
}

.NET Framework
Available since 1.1
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