call存储过程(有返回值)

using (SqlConnection sqlconn = new SqlConnection("server=.;uid=sa;pwd=yuling1310;database=smls"))
            {
                SqlCommand sqlcmd = new SqlCommand("getcerti_notesbigtext", sqlconn);
                sqlcmd.CommandType = CommandType.StoredProcedure;
                //输入参数
                sqlcmd.Parameters.Add("p_certi_type_code", SqlDbType.VarChar, 10).Value = "x";
                sqlcmd.Parameters.Add("p_order_no", SqlDbType.VarChar, 50).Value = "SBF55YQ001";
                sqlcmd.Parameters.Add("@p_certi_no", SqlDbType.VarChar, 50).Value = "00000155";
                sqlcmd.Parameters.Add("@a_certi_sheet_type_code", SqlDbType.VarChar, 10).Value = "1";

                //输出参数
                sqlcmd.Parameters.Add("@text1", SqlDbType.VarChar, 200);
                sqlcmd.Parameters["@text1"].Direction = ParameterDirection.Output;

                sqlcmd.Parameters.Add("@text2", SqlDbType.VarChar, 200);
                sqlcmd.Parameters["@text2"].Direction = ParameterDirection.Output;

                sqlcmd.Parameters.Add("@text3", SqlDbType.VarChar, 200);
                sqlcmd.Parameters["@text3"].Direction = ParameterDirection.Output;

                sqlcmd.Parameters.Add("@text4", SqlDbType.VarChar, 200);
                sqlcmd.Parameters["@text4"].Direction = ParameterDirection.Output;

                sqlconn.Open();
                sqlcmd.ExecuteNonQuery();

                string str = sqlcmd.Parameters["@text1"].Value.ToString();
                sqlconn.Close();
            }

SqlParameter[] param = { new SqlParameter("@userid", SqlDbType.Char, 10) };
param[0].Value = userid;

SqlParameter[] param = { new SqlParameter("@userid", SqlDbType.Char, 10),new SqlParameter("@username",SqlDbType.Char, 15),.. };
param[0].Value = userid;
param[1].Value = username;

if (parm != null)
{
    foreach (SqlParameter sqlparams in parm)
        cmd.Parameters.Add(sqlparams);
}

来源：https://www.cnblogs.com/perfect/archive/2008/05/26/1207454.html