传递参数执行sql语句的实现

SqlDbHelper.cs中的这两个方法的作用：

        /**//// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="cmdParms">参数数组</param>
        /// <returns>影响的记录数</returns>
        public int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(strConn))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        int rows = cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException E)
                    {
                        throw new Exception(E.Message);
                    }
                }
            }
        }

        private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
                conn.Open();
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (trans != null)
                cmd.Transaction = trans;
            cmd.CommandType = CommandType.Text;
            if (cmdParms != null)
            {
                foreach (SqlParameter parm in cmdParms)
                    cmd.Parameters.Add(parm);
            }
        }

在后台代码中：

 protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {

          SqlParameter[] parameters = {
           
                    new SqlParameter("@username", SqlDbType.NVarChar,256),
                    new SqlParameter("@realname", SqlDbType.VarChar,250)
                    };
        parameters[0].Value = "sea";
        parameters[1].Value = "gxc";


        sdh.ExecuteSql("INSERT INTO [TFM].[dbo].[UserInfo] ([UserName] ,[RealName]) VALUES (@username ,@realname)", parameters);


        Response.Write("<script>alert('添加成功！');</script>");
    }