JS传汉字到ashx变成乱码了
js里alert还是汉字，传到ashx变成乱码，在网上查说加那个contentType什么的utf-8，可没说在哪加怎么加？试了好多还是乱码。。。

function getFileName() {
            var path = document.getElementById("Main_FileUpload1").value;
            var pos1 = path.lastIndexOf("\\");
            var pos2 = path.lastIndexOf(".");

            var pos = path.substring(pos1 + 1, pos2);
            alert(pos);

            var xhr = createXhr();
            xhr.open("get", "AjaxTest.ashx?name=" + pos, true);
            xhr.setRequestHeader("contentType", "application/x-www-form-urlencoded; charset=UTF-8");
            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4) {
                    if (xhr.responseText == "y") {
                        alert(xhr.responseText);
                    } else {
                        alert(xhr.responseText);
                    }
                }
            }
            xhr.send(null);
        }

ASHX

<%@ WebHandler Language="C#" Class="AjaxTest" %>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Haiyang.DAL;
using System.IO; 
 
using Haiyang.Model;

public class AjaxTest : IHttpHandler {

    Haiyang.Model.Project p = new Haiyang.Model.Project();
    Haiyang.DAL.ProjtectDAL pd = new Haiyang.DAL.ProjtectDAL();
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        string s=null;
        if (context.Request.QueryString["name"]!=null)
        {
             s= context.Request.QueryString["name"].ToString();    
        }
        System.Threading.Thread.Sleep(200);
        
        if (pd.check(s))
        {
            context.Response.Write("S"+s+"S");
        }
        else
        {
            context.Response.Write(context.Request.QueryString["name"]+"重复了");
        }
    }
}

到底在哪加？？？而且我发现这代码谷歌，火狐好使，IE，搜狗完蛋 JavaScript ajax asp.net ashx
[解决办法]
JS:
xhr.open("get", "AjaxTest.ashx?name=" + encodeURI(pos), true);
ASHX：
URLDecoder.decode();
;


[解决办法]
JS:
xhr.open("get", "AjaxTest.ashx?name=" + encodeURI(pos), true);
ASHX：
context.Server.HtmlDecode(context.Request.QueryString["name"].ToString())