• 如何在.Net Core MVC中为动态表单开启客户端验证


      jquery.unobtrusive-ajax.js源码阅读

      

    /*!
    ** Unobtrusive Ajax support library for jQuery
    ** Copyright (C) Microsoft Corporation. All rights reserved.
    */
     
    /*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false */
    /*global window: false, jQuery: false */
    /*
    data-ajax=true //开启绑定
     
    data-ajax-mode//更新的形式 BEFORE插入到对象之前 AFTER插入到对象之后 为空就是覆盖
    data-ajax-update//更新的对象
    data-ajax-confirm//设置一个确定取消弹出框的文字,没有则不设置
    data-ajax-loading//显示loading的对象
    data-ajax-loading-duration//持续时间 默认是0
    data-ajax-method//提交方式
    data-ajax-url//提交url
    data-ajax-begin//ajax前触发的函数或者一段程序
    data-ajax-complete//完成后,此时还没有加载返回的数据,请求成功或失败时均调用
    data-ajax-success//成功,加载完成的数据
    data-ajax-failure//失败
     
    */
     
    (function ($) {
        var data_click = "unobtrusiveAjaxClick",
            data_validation = "unobtrusiveValidation";
        //第二核心,判断是否函数,不是则构造一个匿名函数
        function getFunction(code, argNames) {
            var fn = window, parts = (code || "").split(".");
            while (fn && parts.length) {
                fn = fn[parts.shift()];
            }//查找函数名有时候是命名空间比如xxx.xxx
            if (typeof (fn) === "function") {
                return fn;
            }
            argNames.push(code);
            //如果不是函数对象则自己构造一个并返回,吊!
            return Function.constructor.apply(null, argNames);
        }
     
        function isMethodProxySafe(method) {
            return method === "GET" || method === "POST";
        }
        //可以添加各种提交方式,应该是为Web Api做的补充
        function asyncOnBeforeSend(xhr, method) {
            if (!isMethodProxySafe(method)) {
                xhr.setRequestHeader("X-HTTP-Method-Override", method);
            }
            //注:X-HTTP-Method-Override是一个非标准的HTTP报头。
            //这是为不能发送某些HTTP请求类型(如PUT或DELETE)的客户端而设计的
        }
        //完成后的
        function asyncOnSuccess(element, data, contentType) {
            var mode;
     
            if (contentType.indexOf("application/x-javascript") !== -1) {  // jQuery already executes JavaScript for us
                return;
            }
     
            mode = (element.getAttribute("data-ajax-mode") || "").toUpperCase();
            $(element.getAttribute("data-ajax-update")).each(function (i, update) {
                var top;
     
                switch (mode) {
                case "BEFORE":
                    top = update.firstChild;
                    $("<div />").html(data).contents().each(function () {
                        update.insertBefore(this, top);
                    });
                    break;
                case "AFTER":
                    $("<div />").html(data).contents().each(function () {
                        update.appendChild(this);
                    });
                    break;
                default:
                    $(update).html(data);
                    break;
                }
            });
        }
        //主要函数
        //绑定的对象和参数
        function asyncRequest(element, options) {
            var confirm, loading, method, duration;
     
            confirm = element.getAttribute("data-ajax-confirm");
            if (confirm && !window.confirm(confirm)) {
                return;
            }
     
            loading = $(element.getAttribute("data-ajax-loading"));//
            duration = element.getAttribute("data-ajax-loading-duration") || 0;//默认是0
     
            $.extend(options, {
                type: element.getAttribute("data-ajax-method") || undefined,
                url: element.getAttribute("data-ajax-url") || undefined,
                beforeSend: function (xhr) {//ajax前触发,此处的xhr将在下面用apply传递出去
                    var result;
                    asyncOnBeforeSend(xhr, method);//判断是否添加特种的提交方式
                    result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);//argument:替换函数对象的其中一个属性对象,存储参数。这里是将原先的参数传递出去,吊!
                    if (result !== false) {
                        loading.show(duration);
                    }
                    return result;
                },
                complete: function () {
                    loading.hide(duration);
                    getFunction(element.getAttribute("data-ajax-complete"), ["xhr", "status"]).apply(this, arguments);
                },
                success: function (data, status, xhr) {
                    asyncOnSuccess(element, data, xhr.getResponseHeader("Content-Type") || "text/html");
                    getFunction(element.getAttribute("data-ajax-success"), ["data", "status", "xhr"]).apply(this, arguments);
                },
                error: getFunction(element.getAttribute("data-ajax-failure"), ["xhr", "status", "error"])
            });
     
            options.data.push({ name: "X-Requested-With", value: "XMLHttpRequest" });
     
            method = options.type.toUpperCase();//大写
            if (!isMethodProxySafe(method)) {
                options.type = "POST";
                options.data.push({ name: "X-HTTP-Method-Override", value: method });
            }
            //最后都是调用jquery的ajax
            $.ajax(options);
        }
     
        function validate(form) {
            //可以取消验证
            var validationInfo = $(form).data(data_validation);
            return !validationInfo || !validationInfo.validate || validationInfo.validate();
        }
     
        $(document).on("click", "a[data-ajax=true]", function (evt) {
            evt.preventDefault();
            asyncRequest(this, {
                url: this.href,
                type: "GET",
                data: []
            });
        });
     
        $(document).on("click", "form[data-ajax=true] input[type=image]", function (evt) {//这个不常用
            var name = evt.target.name,
                $target = $(evt.target),
                form = $target.parents("form")[0],
                offset = $target.offset();
     
            $(form).data(data_click, [
                { name: name + ".x", value: Math.round(evt.pageX - offset.left) },
                { name: name + ".y", value: Math.round(evt.pageY - offset.top) }
            ]);
     
            setTimeout(function () {
                $(form).removeData(data_click);
            }, 0);
        });
     
        $(document).on("click", "form[data-ajax=true] :submit", function (evt) {
            var name = evt.target.name,
                form = $(evt.target).parents("form")[0];
     
            $(form).data(data_click, name ? [{ name: name, value: evt.target.value }] : []);
     
            setTimeout(function () {
                $(form).removeData(data_click);
            }, 0);
        });
     
        $(document).on("submit", "form[data-ajax=true]", function (evt) {
            var clickInfo = $(this).data(data_click) || [];
            evt.preventDefault();
            if (!validate(this)) {
                return;
            }
            asyncRequest(this, {
                url: this.action,
                type: this.method || "GET",
                data: clickInfo.concat($(this).serializeArray())//写得好,序列化表单并拼接,以后的ajax都可以这样,方便啊
            });
        });
    }(jQuery));
    View Code

      jquery.unobtrusive-ajax.js单独的用法

      

    • 非Core中的请参照:

    MVC的验证 jquery.validate.unobtrusive

    mvc验证jquery.unobtrusive-ajax

    参照向动态表单增加验证

    • Core中执行

    页面引入相关JS:

    <script src="~/lib/jquery/dist/jquery.js"></script>
    <script src="~/lib/jquery-validation/dist/jquery.validate.js"></script>
    <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js"></script>
    <script src="~/lib/jquery-ajax-unobtrusive/dist/jquery.unobtrusive-ajax.js"></script>

    向动态表单添加客户端验证

    AddInfo.cshtml内容如下:

    @model BasicFramework.Service.Implementation.Company_AddInfoRQ
    @{
        Layout = "~/Views/Shared/_LayoutModal.cshtml";
    }
    
    @section modalName{
        @L["Add Info"]
    }
    
    <form asp-action="AddInfo" data-ajax="true" data-ajax-mode="replace" data-ajax-update="#Modal"
        data-ajax-success="reLoadModal" data-ajax-method="Post" class="form-horizontal">
        <div class="toolbar">
            @Html.Action("Index", "Toolbar")
        </div>
        <div asp-validation-summary="@ValidationSummary.All" style="color:red" id="validation_day" class="form-group">
            <span style="color:blue">This is my message</span>
        </div>
        <div class="form-group">
            <label asp-for="Code" class="control-label col-md-2"></label>
            <div class="col-md-10">
                <input asp-for="Code" class="form-control required" />
                <span asp-validation-for="Code" style="color:red"></span>
            </div>
        </div>
        <div class="form-group">
            <label asp-for="Name" class="control-label col-md-2" style="color:blue"></label>
            <div class="col-md-10">
                <input asp-for="Name" class="form-control" />
                <span asp-validation-for="Name" style="color:red"></span>
            </div>
        </div>
    
        <div class="modal-footer">
            <input type="submit" value="Create" class="btn btn-primary" />
        </div>
    </form>
    View Code

    Index.cshtml调用页面代码:

        function Add() {
            $.get({
                url: "/Company/AddInfo",
                dataType: "html",
                error: function (jqXHR, textStatus, errorThrown) {
                    alert(textStatus + ": Couldn't add form. " + errorThrown);
                },
                success: function (r) {
                    $("#Modal").html(r);
                    //$("#Modal").find(".modal-dialog").addClass("modal-full");
                    var form = $("#Modal form");
                    //form.removeData("validator"); /* added by the raw jquery.validate plugin */
                    //form.removeData("unobtrusiveValidation");  /* added by the jquery unobtrusive plugin*/;
                    $.validator.unobtrusive.parse(form);
                    $("#Modal").modal();
                }
            });
        }
    View Code

    $.validator.unobtrusive.parse() 方法采用 jQuery 选择器作为它的一个参数。 此方法指示 jQuery 非介入式验证分析该选择器内表单的 data- 属性。 这些属性的值随后传递到 jQuery Validate 插件中,以便表单展示所需的客户端验证规则。

    向动态控件添加客户端验证

    也可以在动态生成各个控件(比如 <input/> 和 <select/>)时,更新表单上的验证规则。 不能将用于这些元素的选择器直接传递到 parse() 方法,因为周围表单已进行分析并且不会更新。 应当先删除现有的验证数据,然后重新分析整个表单,如下所示:

    $.get({
        url: "https://url/that/returns/a/control",
        dataType: "html",
        error: function(jqXHR, textStatus, errorThrown) {
            alert(textStatus + ": Couldn't add control. " + errorThrown);
        },
        success: function(newInputHTML) {
            var form = document.getElementById("my-form");
            form.insertAdjacentHTML("beforeend", newInputHTML);
            $(form).removeData("validator")    // Added by jQuery Validate
                   .removeData("unobtrusiveValidation");   // Added by jQuery Unobtrusive Validation
            $.validator.unobtrusive.parse(form);
        }
    })
    View Code

    MVC内置的验证种类:

    1.[Required] : 必须输入

    [Required(ErrorMessage = "请输入用户名")]  

    2.[StringLength] : 限制字符串长度

    [StringLength(10, ErrorMessage = "长度不能超过10个字符")]  

    3.[Range] : 限制取值范围

    [Range(0, 120, ErrorMessage = "年龄范围在0到120岁之间")]  

    4.[RegularExpression] : 必须符合某个正则表达式(1)直接使用RegularExpression来写表达式:

    [RegularExpression(@"^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$", ErrorMessage = "请输入Email格式")]  
    public String RegualarExpressionField { get; set; } 

    (2)自定义特性:

    复制代码
    public class EmailAttribute : RegularExpressionAttribute  
    {  
        public EmailAttribute()  
            :base(@"^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$")  
        {  
        }  
    }  
    复制代码


     

    5.Compare 判等比较

    复制代码
    public class EmailAttribute : RegularExpressionAttribute  
    {  
        public EmailAttribute()  
             :base(@"^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$")  
         {  
          }  
    }  
    复制代码


    6.Remote : Ajax远程验证,返回值是bool类型 true表示验证通过

    复制代码
    //   Action方法 控制器类    请求方式  
    [Remote("User", "Validate", HttpMethod = "post", ErrorMessage = "用户名已经存在")]  
    public string UserName { get; set; }  
    //....  
    public ActionResult User()  
    {  
    //..  
      if(true)  
      {  
        return Json(true,JsonRequestBehavior.AllowGet);  
      }  
      else  
        return Json(false,JsonRequestBehavior.AllowGet);  
      }  
    复制代码

    7.OutputCache 页面缓存

    [OutputCache(Duration=20)]//设置页面绝对缓存  缓存时间为 20秒  
    public ActionResult Index()  
    {  
        //详细代码  
    }
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  • 原文地址:https://www.cnblogs.com/ceci/p/9172616.html
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