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

        string strSec = Request.QueryString["type"];
        if (strSec == null) strSec = "1";

        SqlCommand cmd = new SqlCommand("select x,y from dbo.rtData where second <= " + strSec, connect);
        SqlDataReader dr = cmd.ExecuteReader();

        string data = "<path style=\"stroke:black;stroke-width:2;fill:none\" d=\"M100,100 ";
        while (dr.Read())
        {
            data += "L"+dr[0] + "," + dr[1] +" ";
        }
        data = data + "\"/>";
        dr.Close();
        connect.Close();

        Response.ContentType = "text/xml";
        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);
    }

}