C#中如何执行存储过程方法

 /// <summary>
    /// 存储过程的属性
    /// ProcName 存储过程的名称
    /// MethodName 执行SqlCommand 方法的名称
    /// PrmList 存储过程的参数
    /// </summary>
    public class ExeProc
    {
        public string ProcName;
        public string MethodName;
        public object[] PrmValue;
    }

public class DataHelper
    {
        private string connString = null;
        public DataHelper(string conStr)
        {
            this.connString = conStr;
        }
        /// <summary>
        ///  执行存储过程
        /// </summary>
        /// <param name="ep">执行存储过程的属性
        /// ProcName 存储过程的名称
        /// MethodName 执行SqlCommand 方法的名称
        /// PrmList 存储过程的参数
        /// </param>
        /// <returns>返回执行的结果</returns>
        public object ExecProcRetObj(ExeProc ep)
        {
            if (this.connString != null && this.connString != string.Empty)
            {
                try
                {
                    SqlConnection con = new SqlConnection(this.connString);
                    SqlCommand cmd = new SqlCommand();
                    cmd.Connection = con;
                    cmd.CommandText = "Exec " + ep.ProcName + " ";
                    foreach (object obj in ep.PrmValue)
                    {
                        cmd.CommandText += obj + ",";
                    }
                    cmd.CommandText = cmd.CommandText.Remove(cmd.CommandText.Length - 1, 1);
                    Type ty = cmd.GetType();
                    con.Open();

                    //用反射根据输入的方法名 执行对应的方法

                    object retObj = ty.InvokeMember(ep.MethodName, BindingFlags.InvokeMethod, null, cmd, null);
                    if (retObj.GetType().FullName == "System.Data.SqlClient.SqlDataReader")
                    {
                        //将返回的object 转换成DataTable
                        DataTable retDt = new DataTable();
                        retDt.Load(retObj as SqlDataReader);
                        con.Close();
                        con.Dispose();
                        return retDt;
                    }

                    return retObj;
                }
                catch (Exception ex)
                {
                    System.Windows.Forms.MessageBox.Show("获取数据发生错误\n" + ex.Message);
                }

            }
            return null;
        }
    }