Jquery ajax调用webservice总结

jquery ajax调用webservice(C#)要注意的几个事项：

1、web.config里需要配置2个地方

<httpHandlers>
      <remove verb="*" path="*.asmx"/>
      <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </httpHandlers>
在<system.web></system.web>之间加入
<webServices>
      <protocols>
        <add name="HttpPost" />
        <add name="HttpGet" />
      </protocols>
    </webServices>

2.正确地编写webserivce的代码

/// <summary>
    /// UserValidate 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
     [System.Web.Script.Services.ScriptService]
    public class UserValidate : System.Web.Services.WebService
    {
        DFHon.Content.Common.rootPublic rp = new DFHon.Content.Common.rootPublic();
        [WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public string ValidateUserLogState()
        {
            string result = "";
            HttpCookie cookie = HttpContext.Current.Request.Cookies["DHFonMenberInfo"];
            if (cookie != null)
            {
                string username = System.Web.HttpUtility.UrlDecode(cookie["MenberName"]);
                int ipoint = 0;
                int gpoint = 0;
                try
                {
                    DataTable dt = UserBll.ExecuteUserAllInfo(username);

                    if (dt.Rows.Count > 0)
                    {
                        ipoint = int.Parse(dt.Rows[0]["iPoint"].ToString());
                        gpoint = int.Parse(dt.Rows[0]["gPoint"].ToString());
                    }
                }
                catch
                { }
                result = "{'user':{'id':'" + cookie["UserId"] + "','name':'" + username + "','message':'" + rp.getUserMsg(DFHon.Global.CurrentCookie.UserName) + "','ipoint':'" + ipoint.ToString() + "','gpoint':'" + gpoint.ToString() + "'}}";
            }
            else
            {
                result = "{'user':{'id':'0','name':'','message':'0','ipoint':'0','gpoint':'0'}}";
            }
            return result;
        }

        [WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public string UserLogin(string userName, string userPwd)
        {
            string returnVal = "";
            try
            {
                GlobalUserInfo info;
                DFHon.Content.UserLogin _UserLogin = new DFHon.Content.UserLogin();
                EnumLoginState state = _UserLogin.PersonLogin(HttpUtility.UrlDecode(userName), userPwd, out info);
                if (state == EnumLoginState.Succeed)
                {
                    DFHon.Global.CurrentCookie.Set(info);
                    DFHon.API.PDO.DiscuzNT.PassportLogin.UserLogin(Server.UrlDecode(userName), userPwd, -1);
                    int ipoint = 0;
                    int gpoint = 0;
                    DataTable dt = UserBll.ExecuteUserAllInfo(userName);

                    if (dt.Rows.Count > 0)
                    {
                        ipoint = int.Parse(dt.Rows[0]["iPoint"].ToString());
                        gpoint = int.Parse(dt.Rows[0]["gPoint"].ToString());
                    }
                    returnVal = "{'user':{'id':'" + info.UserId.ToString() + "','name':'" + info.UserName + "','message':'" + rp.getUserMsg(userName) + "','ipoint':'" + ipoint.ToString() + "','gpoint':'" + gpoint.ToString() + "'}}";
                }
                else
                {
                    int ids = 0;//状态：-2用户被锁定 -1用户名密码错误
                    switch (state)
                    {
                        case EnumLoginState.Err_Locked:
                            ids = -2;
                            break;
                        case EnumLoginState.Err_UserNameOrPwdError:
                            ids = -1;
                            break;
                        default:
                            break;
                    }
                    returnVal = "{'user':{'id':'" + ids + "','name':'','message':'0','ipoint':'0','gpoint':'0'}}";
                }
            }
            catch
            {
                returnVal = "{'user':{'id':'0','name':'','message':'0','ipoint':'0','gpoint':'0'}}";
            }
            return returnVal;
        }
        [WebMethod]
        public string UserLogout()
        {
            if (HttpContext.Current.Request.Cookies["DHFonMenberInfo"] != null)
            {
                HttpCookie cookie = new HttpCookie("DHFonMenberInfo");
                cookie.Expires = System.DateTime.Now.AddDays(-1);
                cookie.Domain = DFHon.Config.BaseConfig.getV("weblogin");
                HttpContext.Current.Response.AppendCookie(cookie);
            }
            return "1";
        }
        DFHon.Content.user UserBll = new DFHon.Content.user();
        [WebMethod]
        public string ValidateUserEmail(string email)
        {
            string result = "0";//返回的结果 -2邮箱为空 -1邮箱格式不正确 0邮箱存在 1填写正确
            if (string.IsNullOrEmpty(email))
            {
                result = "-2";//邮箱为空
            }
            else if (!IsValidEmail(email))
            {
                result = "-1";//邮箱格式不正确
            }
            else if (UserBll.sel_useremail(email) > 0)
            {
                result = "0";//邮箱存在
            }
            else
            {
                result = "1";//可以注册
            }
            return result;
        }

        [WebMethod]
        public string ValidateUserName(string username)
        {
            string result = "0";//返回值：-1用户名长度为2-16;0用户名存在;1可以注册
            if (username == "" || username == null || username.Length < 2 || username.Length > 16)
            {
                result = "-1";
            }
            else if (UserBll.sel_username(username) != 0)
            {
                result = "0";
            }
            else
            {
                result = "1";
            }
            return result;
        }

        public bool IsValidEmail(string strIn)
        { // Return true if strIn is in valid e-mail format. 
            return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$");
        }
    }

3、前台JQuery代码

<script>
        $(function() {
            $("#userloging").show();
            //登录框处理开始
            //加载登录状态
            $.ajax({
                type: "POST", //访问WebService使用Post方式请求
                contentType: "application/json;charset=utf-8", //WebService 会返回Json类型
                url: "/API/Service/UserValidate.asmx/ValidateUserLogState", //调用WebService
                data: "{}", //Email参数
                dataType: 'json',
                beforeSend: function(x) { x.setRequestHeader("Content-Type", "application/json; charset=utf-8"); },
                error: function(x, e) { },
                success: function(response) { //回调函数，result，返回值
                    $("#userloging").hide();
                    var json = eval('(' + response.d + ')');
                    var userid = json.user.id;
                    if (userid > 0) {
                        $("#spanusername").html(json.user.name);
                        $("#spanmessagenum").html(json.user.message);
                        $("#userloginsucced").show();
                        $("#userloginbox").hide();
                    }
                }
            });
            //登录
            $("#userlogbutton").click(function() {
               
                var username = $("#username").val();
                var userpwd = $("#userpassword").val();
                if (username != "" && userpwd != "") {
                    $("#userloging").show();
                    $.ajax({
                        type: "POST", //访问WebService使用Post方式请求
                        contentType: "application/json;charset=utf-8", //WebService 会返回Json类型
                        url: "/API/Service/UserValidate.asmx/UserLogin", //调用WebService
                        data: "{userName:'" + username + "',userPwd:'" + userpwd + "'}", //Email参数
                        dataType: 'json',
                        beforeSend: function(x) { x.setRequestHeader("Content-Type", "application/json; charset=utf-8"); },
                        error: function(x, e) {
                        },
                        success: function(result) { //回调函数，result，返回值
                            $("#userloging").hide();
                            var json = eval('(' + result.d + ')');
                            var userid = json.user.id;
                            if (userid > 0) {
                                $("#spanusername").html(json.user.name);
                                $("#spanmessagenum").html(json.user.message);
                                $("#userloginsucced").show();
                                $("#userloginbox").hide();
                            }
                            else {
                                switch (userid) {
                                    case -2:
                                        alert("用户被锁定！请30分钟后再登录！");
                                        $("#username").focus();
                                        break;
                                    case -1:
                                        alert("用户名或密码错误！请核对您的用户名和密码！");
                                        $("#userpassword").focus();
                                        break;
                                    default:
                                        alert("登录失败！请核对您的用户名和密码之后重试！");
                                        $("#userpassword").focus();
                                        break;
                                }
                            }
                        }
                    });
                }
                else if (username == "") {
                    alert("用户名不能为空！");
                    $("#username").focus();
                }
                else if (userpwd == "") {
                    alert("密码不能为空！");
                    $("#userpassword").focus();
                }
            });
            //退出
            $("#logout").click(function() {
                $("#userloging").show();
                $.ajax({
                    type: "POST", //访问WebService使用Post方式请求
                    contentType: "application/json;utf-8", //WebService 会返回Json类型
                    url: "/API/Service/UserValidate.asmx/UserLogout", //调用WebService
                    data: "{}", //Email参数
                    dataType: 'json',
                    beforeSend: function(x) { x.setRequestHeader("Content-Type", "application/json; charset=utf-8"); },
                    success: function(result) { //回调函数，result，返回值
                        $("#userloging").hide();
                        if (result.d > 0) {
                            $("#userloginsucced").hide();
                            $("#userloginbox").show();
                        }
                    }
                });

            }); //登录框处理结束

        });
        </script>