读取SQL / MysqL数据库的接口

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Data.SqlClient;
using System.Security.Cryptography;
public partial class Local_GetLine1Data : System.Web.UI.Page
{
    //SELECT TOP 264 [TagName],[TagValue] FROM [JiaLi].[dbo].[Line1] order by ID desc
    protected void Page_Load(object sender, EventArgs e)
    {
        //数据库+Json
        MyJson.JsonNode_Object json = new MyJson.JsonNode_Object();
        using (SqlConnection myconn = dbhelper.Instance().getMySqlCon())
        {
            SqlCommand mySqlCommand = dbhelper.Instance().getSqlCommand("SELECT TOP 264 [TagName],[TagValue] FROM [JiaLi].[dbo].[Line1] order by ID desc", myconn);
            myconn.Open();
            SqlDataReader reader = mySqlCommand.ExecuteReader();

            json.asDict()["nameList"] = new MyJson.JsonNode_Array();

            while (reader.Read())
            {
                if (reader.HasRows)
                {
                    MyJson.JsonNode_Object rowsJson = new MyJson.JsonNode_Object();
                    //rowsJson.asDict()["name"] = new MyJson.JsonNode_ValueString(reader["name"].ToString());
                    rowsJson.asDict()["TagName"] = new MyJson.JsonNode_ValueString(reader["TagName"].ToString());
                    rowsJson.asDict()["TagValue"] = new MyJson.JsonNode_ValueString(reader["TagValue"].ToString());
                    //rowsJson.asDict()["order_no"] = new MyJson.JsonNode_ValueString(reader["order_no"].ToString());
                    //rowsJson.asDict()["title"] = new MyJson.JsonNode_ValueString(reader["title"].ToString());
                    //rowsJson.asDict()["mark"] = new MyJson.JsonNode_ValueString(reader["mark"].ToString());
                    //rowsJson.asDict()["temp"] = new MyJson.JsonNode_ValueString(reader["temp"].ToString());
                    json.asDict()["nameList"].AsList().Add(rowsJson);
                }
            }
            reader.Close();
            myconn.Close();
        }
        json.asDict()["state"] = new MyJson.JsonNode_ValueNumber(1);

        Response.Write(json.ToString());
    }
}

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