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));
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  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>
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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);
                $("#Modal").modal();
            }
        });
    }
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$.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);
    }
})
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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  
}

 

posted @ 2018-06-12 13:42  邑尘  阅读(522)  评论(0编辑  收藏  举报