Question

asp.net后台调用前台javascript方法alert的值

我在前台写了一个javascript的方法
function check()
{
var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false";
xmlDoc.load("http://211.138.127.43:1645/cgi/checkuser.ktcl?username=document.getElementById(cb_username)&password=document.getElementById(cb_password)");
nodes = xmlDoc.documentElement.childNodes;
var text = xmlDoc.selectSingleNode("//Retcode").text;
alert(text);
}</script>

现在在后台想调用这个方法，并且将alert中的值读取出来

试了好多方法都不行，求各位高手相助，谢谢！！！！
回答问题的高手们，可不可以请你们把问题回答的详细些？谢谢

Answer 1

在后台写

string postData = "username="+cb_username.Value+"&password="+cb_password.Value;
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create("http://211.138.127.43:1645/cgi/checkuser.ktcl?");
objWebRequest.Method = "POST";
objWebRequest.ContentType = "application/x-www-form-urlencoded";
objWebRequest.ContentLength = byteArray.Length;
Stream newStream = objWebRequest.GetRequestStream();
newStream.Write(byteArray, 0, byteArray.Length);
newStream.Close();

HttpWebResponse resoponse = (HttpWebResponse)objWebRequest.GetResponse();
StreamReader sr = new StreamReader(resoponse.GetResponseStream(), Encoding.Default);
string sss = sr.ReadToEnd();

XmlDocument responseDoc = new XmlDocument();

responseDoc.LoadXml(sss);
string Username = responseDoc.SelectSingleNode("//Username").InnerText;
string States = responseDoc.SelectSingleNode("//Retcode").InnerText;
string Messages = "";

switch^……case……自己的判断就可以了

Answer 2

js调用和后台无关,只和网页有关,如果你想把数据送给服务器的话,可以用ajax实现...

Answer 3

把前台的js内容用response.write写到后台试试。

Answer 4

用Ajax把text传回服务器

Answer 5

只能用楼上说的方法