C#调用带参数的存储过程

带参数的存储过程：默认参数、输出参数、返回值

/*==============================================
-- Author: xuminghui
-- Create date: 2011/03/28
-- Description: 带默认参数，输出参数和返回值的存储过程
-- =============================================
CREATE PROCEDURE ProcedureTest
@myName varchar(20) output,
@myAge int = 33
AS
BEGIN
SET NOCOUNT ON;

set @myName='xuminghui'
return 1978+@myAge
END
GO
*/
private static void SqlCommandWithComplexParameters()
{
string connect = "Data Source=.\\sqlexpress; Initial Catalog=NorthWind ; Integrated Security = true;";
//准备Connection对象和Command对象：设置Command对象调用存储过程
SqlConnection cn = new SqlConnection(connect);
SqlCommand cmd = new SqlCommand("ProcedureTest", cn);
cmd.CommandType = CommandType.StoredProcedure;

//设定参数：输出参数-参数名称必须和存储过程输出参数名一致；
//返回值参数-参数名称任意、修改默认参数
SqlParameter paramMyName = cmd.Parameters.Add("@myname", SqlDbType.VarChar, 20);
paramMyName.Direction = ParameterDirection.Output;
SqlParameter paramReturnValue = cmd.Parameters.Add("Return", SqlDbType.Int);
paramReturnValue.Direction = ParameterDirection.ReturnValue;
//cmd.Parameters.AddWithValue("@myAge", 34);
//执行查询，获取存储过程执行后的输出参数和返回参数值

cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
//输出结果：MyName=xuminghui ReturnValue=2011
Console.WriteLine("MyName={0}\t ReturnValue={1}\t \n", paramMyName.Value, paramReturnValue.Value);
}