jqeury在用户控件异步提交数据求一个解决方案、

 /// <summary>

    /// 获取URL

    /// </summary>

    /// <returns></returns>

    public string stringUrl()

    {

        return Request.Url.ToString();

    }

    $("#huiyuan_login").click(function () {

       

        var username = $("#username").val();

        var password = $("#password").val();

        var stringUrl=$("#stringUrl").val();

        alert(stringUrl);

        var isVailid = true;



        if (username.length <= 0) {

            alert("会员名不能为空！");

            $("#username").focus();

            isVailid = false;

            return false;

        } if (password.length <= 0) {

            alert("密码不能为空!");

            $("#password").focus();

            isVailid = false;

            return false;

        }

        ///////

        if (isVailid) {

            $.ajax({

                type: "post",

                url:"",

                data: { username: $("#username").val(), password: $("#password").val() },

                beforeSend: function () { $("#messages").html("logining"); },

                success: function (data) {

                    $("#messages").html(decodeURI(data));

                }

            });

        }

    });

 if (isVailid) {

            $.ajax({

               // contentType: "application/jo; charset=utf-8",

               // dataType: "text",

                type: "post",

                url: location.href,

                data: { username: $("#username").val(), password: $("#password").val() },

               // data: "{username:'" + $("#username").val() + "',password:'" + $("#password").val() + "'}",

                beforeSend: function () { $("#messages").html("正在登陆，请稍后....."); },

                success: function (data) {

//                   // alert(data);

//                   // var obj = eval("(" + data + ")");

                    //                    var obj = JSON.parse(data);

                    var dataObj = eval("(" + data + ")"); //转换为json对象  

                    alert(dataObj);

                }

            });

        }

    });

if (IsPostBack)

        {

            if (!string.IsNullOrEmpty(Request["username"]) && !string.IsNullOrEmpty(Request["password"]))

            {

                string IsValidate = "false";   //检测是否有用户

                string username = Common.FilteStr(Request["username"].ToString());

                string password = Common.FilteStr(Request["password"].ToString());



                string sql = "select * from userinfo where username='" + username + "' and newPassword='" + password + "'";

                DataTable dt = Common.GetTable(sql);

                if (dt.Rows.Count > 0)

                {

                    IsValidate = "true";

                }

                else

                {

                    IsValidate = "false";

                }

                //////不让浏览器使用缓存

                Response.ContentType = "text/plain";

                //Response.Buffer = true;

                //Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);

                //Response.AddHeader("pragma", "no-cache");

                //Response.AddHeader("cache-control", "");

                //Response.CacheControl = "no-cache";

                //Response.Clear();

                //Response.ClearHeaders();

                //Response.Write(IsValidate);

                //Response.Flush();

                //Response.Close();

                //Response.Clear();

                //Response.Write("'" + IsValidate + "'");

                //Response.End();     

                Response.Write(IsValidate);

              //  Response.Flush();

                Response.End();

            }

            else

            {

                Page.ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('用户名和密码都不能为空');</script>");

            }



        }