jquery validate 自定义验证方法（前后台交互）

JS:

var dataCode = {
    key: "IsHasAUserName",
    AUserName: function() {

        return $("#AUserName").val();
    }
};
var remoteHasAUserNameFun= GetRemoteInfo('/Service/CommanHandler.ashx', dataCode);

$("#form1").validate({
        rules: {
            txtUserName: {
                required: true,
                remote: remoteHasAUserNameFun
            },
            txtPass: {
                required: true,
                minlength: 6
            },
            txtConfirmPass: {
                required: true,
                equalTo: "#txtPass"
            },
            txtName: {
                required: true
            }
        },
        messages: {
            txtUserName: {
                required: "请输入账号"
            },
            txtPass: {
                required: "请输入新密码",
                minlength: "密码最少不得少于6位字符"
            },
            txtConfirmPass: {
                required: "请输入确认密码",
                equalTo: "密码不一致。"
            },
            txtName: {
                required: "请输入姓名"
            }
        },
        errorLabelContainer: $(".bg-info")
    });

C#:

private XmlDocument IsHasAUserName()
        {
            string AUserName = contextWai.Request.Form["AUserName"];

            AjaxClass ajaxClass = new AjaxClass();
            commonHelperManager manager = commonHelperManager.GetInstrance();
            object result = manager.ExecuteScalar(sql, CommandType.Text, Field.SetParam("@AUserName",AUserName));
            if (Convert.ToInt32(result)>0)
            {
                ajaxClass.Msg = "账号已存在，请另换一个。";
                ajaxClass.Result = 0;
            }
            else
            {
                ajaxClass.Msg = "验证成功。";
                ajaxClass.Result = 1;
            }
            string resultxml = Utility.Tool.Serialize(ajaxClass);

            XmlDocument doc = new XmlDocument();
            doc.LoadXml(resultxml);
            contextWai.Response.ContentType = "text/xml"; //must be 'text/xml'
            contextWai.Response.ContentEncoding = System.Text.Encoding.UTF8; //we'd like UTF-8
            doc.Save(contextWai.Response.Output); //save to the text-writer
            return doc;
        }

另外一种：

//验证
function validateFrom() {
    jQuery.validator.addMethod("CheckPinYin", function (value, element) {
        if ($.trim(value) != "") {
            var result = "0";

            $.ajax({
                url: '/SystemPage/Service/News/NewsClassHandler.ashx',
                type: 'POST',
                async: false,//同步,在这里不能用异步的，因为validate是即时验证的
                data: {
                    "key": "CheckPinYinOfSonClass",
                    "CPinYin": value,
                    "ClassId": classID,
                    "PageURL": "/SystemPage/News/AddNewsClass.aspx"
                },
                dataType: 'text',
                timeout: 8000,
                success: function (e) {
                    result = e;//不能讲判断放在这里，放在外面才可以判断，可能在$.ajax里return true or false表示的意思冲突了。
                }
            });
            if (result == "1") {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }, "此标识已存在，请另换一个");

    $("#form1").validate({
        rules: {
            txtCName: {
                required: true
            },
            txtCByName:
            {
                required: true
            }, txtCPinYin: {
                required: true,
                CheckPinYin: true
            }, txtCNewsTemplateUrl: {
                required: true
            }, txtClassTemplet:
            {
                required: true
            }
            , txtNewsTemplet:
            {
                required: true
            }
        },
        messages: {
            txtCName: {
                required: "请输入……"
            }, txtCByName:
            {
                required: "请输入……"
            }, txtCPinYin: {
                required: "请输入……"
            }, txtCNewsTemplateUrl: {
                required: "请输入……"
            }, txtClassTemplet:
            {
                required: "请选择……"
            }
            , txtNewsTemplet:
            {
                required: "请选择……"
            }
        }
        , success: function (label) {
            label.html(" ").attr("class", "success").siblings("label").remove();
        },
        errorPlacement: function (error, element) {
            $(element).next("span").find(".success").remove();
            error.appendTo(element.next("span"));
        }
    });
}