页面搜索显示乱码问题解决方法

<?xml version="1.0" encoding="GB2312"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml xml:lang="zh-cn">
<card id="card1" title="卡片1">
<!--提交到其他页面或服务端示例-->
<do type="accept">
输入值：
<input type="text" name="txtKey" maxlength="20"/><br/>
<go href="hol.wmls#check()" method="post">
搜索
</go>
</do>
</card>
</wml>

Wmlscript文件（hol.wmls）：

extern function check()
{
    var x = WMLBrowser.getVar("txtKey");
    var xx = URL.escapeString(x);
    
    var para = "skey=" + xx;
    WMLBrowser.go("so.aspx?"+para);
}

private void Page_Load(object sender, System.EventArgs e)
{
    // 在此处放置用户代码以初始化页面
    string url = Request.RawUrl;
    string key = QryStrUtil( url, "skey");
    key = UnEscapeString (key);
}

/// <summary>
/// 获取原始Url中的制定参数的值
/// </summary>
/// <param name="sRawUrl">原始Url</param>
/// <param name="sKey">参数</param>
/// <returns>值</returns>
private string QryStrUtil (string sRawUrl, string sKey)
{
    string sValue = string.Empty;
    int index = sRawUrl.IndexOf(‘?‘);

    if (-1 != index && -1 != sRawUrl.IndexOf(‘=‘))
    {
       sRawUrl = sRawUrl.Substring(index + 1,  sRawUrl.Length - index - 1);

       string[] asParaInfo = sRawUrl.Split(‘&‘);
       string _key = string.Empty;
       foreach(string sParaInfo in asParaInfo)
       {
           if (null == sParaInfo || string.Empty == sParaInfo)
              continue;

           index = sParaInfo.IndexOf("=");
           if (-1 == index)
              continue;

           _key = sParaInfo.Substring(0, index);
           if (_key == sKey)
           {
              sValue = sParaInfo.Substring(index + 1, sParaInfo.Length - index - 1);
           }
       }
    }
    return sValue;
}
/// <summary>
/// 汉字编码反转换
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private string UnEscapeString(string s)
{
    string sub1, sub2, sub3;
    while(-1 != s.IndexOf(‘%‘))
    {
       sub1 = s.Substring(0, s.IndexOf(‘%‘));
       sub2 = s.Substring(sub1.Length,6);
       sub3 = s.Remove(0, sub1.Length + sub2.Length);

       sub2 = sub2.Remove(0,1);

       string[] scode = sub2.Split(‘%‘);
       Byte[] bCodes = new byte[scode.Length];
       for(int i=0; i<scode.Length; i++)
       {
           int sh,sl,val;
           string code = scode[i];
           sh = Convert.ToInt32(code.Substring(0,1),16);
           sl = Convert.ToInt32(code.Substring(1,1),16);

           val = sh * 16 + sl;
           bCodes[i] = Convert.ToByte(val.ToString(),10);
       }
       sub2 = Encoding.GetEncoding("gb2312").GetString(bCodes);
       s = sub1 + sub2 + sub3;
    }
    return s;
}

/// <summary> 
/// 汉字编码转换（该方法还不完美，会对字母及数字等编码）
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
public string EscapeString(string s)
{
    string res = string.Empty;
    Byte[] bCodes = Encoding.GetEncoding("gb2312").GetBytes(s);
    ASCIIEncoding ascii = new ASCIIEncoding();
    for(int i=0;i<bCodes.Length ;i++)
    {
       int val = bCodes[i];
       val = (val < 0) ? val+256 : val;
       int sh,sl;
       sh = val/16;
       sl = val%16;

       res += "%";
       res += Convert.ToString(sh,16);
       res += Convert.ToString(sl,16);
    }
    return res;
}