map.aspx.cs

《SVG开发实践》源代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string type = Request.QueryString["type"];
        switch( type ) 
        {
            case "1":
                getCityList();
                break;
            case "2":
                searchCity(Request.QueryString["cname"].Trim());
                break;
            default:
                break;
        }
    }

    private void getCityList()
    {
        string data = "";
        try
        {
            SqlConnection connect = getConnection();
            SqlCommand cmd = null;
            if (connect != null)
            {
                cmd = new SqlCommand("select * from dbo.CityData", connect);
            }
            SqlDataReader dr = cmd.ExecuteReader();

           
            while (dr.Read())
            {
                data += dr[0].ToString().Trim() + "," + dr[1] + "," + dr[2] + "," + dr[3].ToString().Trim() + ";";
            }
            dr.Close();
            connect.Close();
        }
        catch
        {
        }

        Response.ContentType = "text/html";
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.Write(data);
        Response.End();
    }

    private void searchCity(string strCityName)
    {
        string data = "";
        try
        {
            SqlConnection connect = getConnection();
            SqlCommand cmd = null;
            if (connect != null)
            {
                cmd = new SqlCommand("select lon,lat from dbo.CityData where name like N'%" + strCityName +"%'", connect);
            }
            SqlDataReader dr = cmd.ExecuteReader();


            dr.Read();
            data += dr[0] + "," + dr[1];
           
            dr.Close();
            connect.Close();
        }
        catch
        {
        }

        Response.ContentType = "text/html";
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.Write(data);
        Response.End();
    }

    private string getADONETConnectString(string strDataSource, string strUID, string strPWD, string strInitialCatalog)
    {
        return string.Format("Data Source={0};User ID={1};pwd={2};Initial Catalog={3};",
                                 strDataSource, strUID, strPWD, strInitialCatalog);
    }

    private SqlConnection getConnection()
    {
        SqlConnection connect = new SqlConnection(getADONETConnectString("welfreda", "sa", "Abcd1234!", "testSVG"));
        try
        {
            connect.Open();
        }
        catch
        {
            connect.Close();
        }
        return connect;
    }

}