获取天气预报

1)利用Ajax获取天气预报

 

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Untitled Page</title>
   
    <script language="javascript" type="text/javascript">
        var xmlhttp;
        var url="http://php.weather.sina.com.cn/search.php?city=%E6%B7%B1%E5%9C%B3";
        function createXmlHttp()
        {
            if(window.ActiveXObject)
            {
                xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
            if(window.XMLHttpRequest)
            {
                xmlhttp=new XMLHttpRequest();
            }
        }
        function GetWeartherData()
        {
            createXmlHttp();
            xmlhttp.open("GET",url,true);
            xmlhttp.onreadystatechange=changeState
            xmlhttp.send(null);
        }
        function changeState()
        {
            if(xmlhttp.readystate==4&&xmlhttp.status==200)
            {
                //var data=bytes2BSTR(xmlhttp.responseBody);
               // var start=data.indexOf("天气状况 begin")+15;
               // var end=data.indexOf("天气状况 end");
               // var weartherData=data.substring(start,end);
                //document.getElementById("wearther").innerHTML=weartherData;
                var data = bytes2BSTR(xmlhttp.responseBody);
                var start = data.indexOf("天气状况 begin") + 15;
                var end = data.indexOf("天气状况 end");
                var weartherData = data.substring(start, end);
                document.getElementById("wearther").innerHTML = weartherData;
                var obj = document.getElementById("Weather3DBlk");
                var objarr = obj.childNodes;
                var todayobj = objarr[0];
                var arrDiv = todayobj.getElementsByTagName("div");
                todayobj.removeChild(arrDiv[arrDiv.length - 1]);
                document.getElementById("wearther").innerHTML = todayobj.innerHTML;
            }
        }
       
    </script>
    <script language="vbscript" type="text/vbscript">
         function bytes2BSTR(vIn)
            dim strReturn,i,ThisCharCode,innerCode,Hight8,Low8,NextCharCode
            strReturn=""
            for i=1 to LenB(vIn)
            ThisCharCode=AscB(MidB(vIn,i,1))
            if ThisCharCode<&H80 Then
            strReturn=strReturn & Chr(ThisCharCode)
            else
            NextCharCode=AscB(MidB(vIn,i+1,1))
            strReturn=strReturn&Chr(CLng(ThisCharCode)*&H100+CInt(NextCharCode))
            i=i+1
            end if
            next
            bytes2BSTR=strReturn
         end function
    </script>
</head>
<body onload="GetWeartherData();">
    <form id="form1" runat="server">
    <div id="wearther">
    <asp:TextBox ID="TextBox2" runat="server" Text=""></asp:TextBox>
    </div>
    </form>
</body>

 

 

2)后台获取天气预报

  WebClient client = new WebClient();
        Stream response = client.OpenRead("要获取的地址");
        StreamReader sr = new StreamReader(response, System.Text.Encoding.Default);
        string content = string.Empty;
        TextBox2.Text = sr.ReadToEnd(); //textbox2为接收的元素

posted on 2009-03-23 22:35  Gsun  阅读(1139)  评论(2)    收藏  举报

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