asp.net Core MVC 有特别处理form，controller可以自己处理model的验证，最大的优势是写form时可以少写代码
先了解tag helper ，这东西就是element上的attribute，在angular来说就是指令，通过指令可以很好的写代码
cshtml
@model Project.Web.Home.Product<form class="myForm" asp-controller="Home" asp-action="Form" method="post"> ???<!-- Input and Submit elements --> ???<label asp-for="name"></label> ???<input asp-for="name" class="form-control" /> ???<button type="submit">Submit</button> ???<span asp-validation-for="name"></span>????</form>
Controller
public class Product ???{ ???????[Required(ErrorMessage = "Required")]//可以验证 ???????[Display(Name = "Product Name")] ???????public string name { get; set; } ???}编辑后的cshtml
<form class="myForm" method="post" action="/form" novalidate="novalidate"> ???<!-- Input and Submit elements --> ???<label for="name">Product Name</label> ???<input class="form-control" type="text" data-val="true" data-val-required="Required" id="name" name="name" value="keat">//先忽略keat ???<button type="submit">Submit</button> ???<span class="field-validation-valid" data-valmsg-for="name" data-valmsg-replace="true"></span>????</form>
通过以上的代码，结果可以看出tag helper大致上处理了一些代码，还需要最后的validation和 model binding
Controller
public class HomeController : Controller ???{ ???????[Route("")] //忽略 ???????[Route("{cnOrAmp:regex(^cn$|^amp$)}")]//忽略 ???????public IActionResult Index(string cnOrAmp = "en") ???????{ ???????????var vm = new HomeVm(); ???????????vm.product = new Product(); ???????????vm.product2 = new Product2();//忽略 ???????????vm.product.name = "keat"; ???????????vm.product2.name2 = "mark";//忽略 ???????????if (cnOrAmp == "amp") {//忽略 ???????????????return View("~/Web/Home/Amp/Index.cshtml",vm);//忽略 ???????????}//忽略 ???????????return View("~/Web/Home/Index.cshtml", vm); ???????}这样就实现了model binding
最后就是主角了，validation。
<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.2.0.min.js"></script><script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.16.0/jquery.validate.min.js"></script><script src="https://ajax.aspnetcdn.com/ajax/jquery.validation.unobtrusive/3.2.6/jquery.validate.unobtrusive.min.js"></script>
就这样就有一个完整的form了，在asp.net Core MVC有个麻烦的问题，就是form不好管理，如果一个项目一个页面就只有一个form，那么没事发生，但是如果在多个页面重复那该怎么办，答案是ajaxing（MVC不支持）
介绍github 4000多个星星的plugin
https://github.com/jquery-form/form
<script> ???????// wait for the DOM to be loaded ???????$(document).ready(function () { ???????????// bind ‘myForm‘ and provide a simple callback function ???????????$(‘.myForm‘).ajaxForm({ ???????????????success: function (response, textStatus, xhr, form) { ???????????????????console.log("in ajaxForm success"); ???????????????????if (!response.length || response != ‘good‘) { ???????????????????????console.log("bad or empty response"); ???????????????????????return xhr.abort(); ???????????????????} ???????????????????console.log("All good. Do stuff"); ???????????????}, ???????????????error: function (xhr, textStatus, errorThrown) { ???????????????????console.log("in ajaxForm error"); ???????????????}, ???????????????complete: function (xhr, textStatus) { ???????????????????console.log("in ajaxForm complete"); ???????????????}, ???????????????beforeSend: function () { ???????????????????console.log("before send"); ???????????????} ???????????}); ???????}); ???</script>对提交过程中处理不同的状况
以上
asp.net Core MVC + form validation + ajax form 笔记
原文地址：http://www.cnblogs.com/stooges/p/7648742.html