aspx.cs方法设置webmenthod特性接收ajax请求

cs代码：

public partial class TelerikWebMethod : BasePage//System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            TelerikWebMethod.username = this.UserInfo.UserName;
            TelerikWebMethod.domainname = this.UserInfo.DomainName;
        }

　　　　　　/// <summary>
　　　　　　/// 加密跳转页面链接
　　　　　　/// </summary>
　　　　　　private static readonly byte[] key = System.Text.Encoding.Default.GetBytes("abcd12");

        [WebMethod]
        public static string ReturnEncryptionPageUrl(string UserName, string DomainName)
        {
            string Email = string.Empty;
            //string Url = "http://10.76.1.25//login.do";
            string Url = "http://ia.cnpc/login.do";
            string time = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

            if (DomainName.ToUpper().Contains("PTR"))
            {
                Email = UserName + "@petrochina.com.cn";
            }
            else if (DomainName.ToUpper().Contains("CNPC"))
            {
                Email = UserName + "@cnpc.com.cn";
            }
            AESDecrypt ad = new AESDecrypt();
            string user = ad.Encrypt(Email + "," + time, key);
            user = HttpUtility.UrlEncode(user, Encoding.UTF8);
            //user = user.Replace("+", "%20");
            user = user.Replace("+", "%2B");
            user = user.Replace("/", "%2F");
            return Url;
        }
}

　　前端页面：

$.　　　　　　　　　　　　ajax(
                           {
                               async: false,
                               type: "POST",
                               contentType: "application/json",
                               url: "TelerikWebMethod.aspx/ReturnEncryptionPageUrl",
                               data: "{'UserName':'" + UserName + "','DomainName':'" + DomainName + "'}",
                               dataType: "json",
                               success: function (msg) {
                                   //window.open(msg.d, "newwindow", "height=100, width=400, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, status=no")

                                   window.open(msg.d, "newwindow");
                               },
                               error: function (err) {
                                   alert(err.responseText);
                               }
                           });