在你的网站上实现地图功能

<div id="myMap" style="position:relative; float:left;width:300px; height:225px;"></div>

<script language="javascript" type="text/javascript" src="http://api.51ditu.com/js/maps.js" charset="utf-8"></script>

<script language="javascript" type="text/javascript" charset="utf-8">

        var x;

        var y;

        var maps = new LTMaps( "myMap" );

        maps.cityNameAndZoom( "shijiazhuang" , 2 );

        maps.centerAndZoom( new LTPoint( x , y ) , 2 );

        var marker1 = new LTMarker( new LTPoint( x , y ) );

        maps.addOverLay( marker1 );

</script>

 string x = dsbtf.Tables["ds"].Rows[0][1].ToString();// 地图中的经纬度从数据库中读出

        string y = dsbtf.Tables["ds"].Rows[0][2].ToString();

        this.Page.RegisterClientScriptBlock("x", "<script language='javascript' type='text/javascript' charset='utf-8'>x='" + x + "'</script>");

        this.Page.RegisterClientScriptBlock("y", "<script language='javascript' type='text/javascript' charset='utf-8'>y='" + y + "'</script>");