C#中调用存储过程：带输入输出参数

源代码如下：

using (SqlConnection conn = new SqlConnection(this.GetConnectionString(this.WMPDBName)))            {                SqlCommand cmd = conn.CreateCommand();                cmd.CommandType = System.Data.CommandType.StoredProcedure;                cmd.CommandText = "存储过程名称";                ////输出参数                cmd.Parameters.Add(new SqlParameter("@DeleteTotal", System.Data.SqlDbType.Int));                cmd.Parameters["@DeleteTotal"].Direction = System.Data.ParameterDirection.Output;                cmd.Parameters.Add(new SqlParameter("@InsertTotal", System.Data.SqlDbType.Int));                cmd.Parameters["@InsertTotal"].Direction = System.Data.ParameterDirection.Output;                //// 输入参数【方式一】                cmd.Parameters.Add(new SqlParameter("@PageIndex", System.Data.SqlDbType.Int));                cmd.Parameters["@PageIndex"].Direction = System.Data.ParameterDirection.Input;                cmd.Parameters["@PageIndex"].Value = 1;                //// 输入参数【方式二】                cmd.Parameters.Add(new SqlParameter("@PageIndex", 1));                conn.Open();                cmd.ExecuteNonQuery();                int.TryParse(cmd.Parameters["@DeleteTotal"].Value.ToString(), out deleteTotal);                int.TryParse(cmd.Parameters["@InsertTotal"].Value.ToString(), out insertTotal);            }using (SqlConnection conn = new SqlCon