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javascript - 引导模式+ajax+jquery+验证+.net core 2.0

转载 作者:行者123 更新时间:2023-12-03 02:08:40 25 4
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我正在尝试创建一个简单的电影数据库类型的应用程序,用于学习 bootstrap 和 mvc。我在.net core 2.0中使用了adminlte模板。仅使用 mvc 一切工作正常。但后来我想了解更多,所以我开始使用ajax和jquery来发送和接收数据。对于创建/编辑/,我使用了引导模式。我在这里遇到了主要问题。我可以从客户端验证。但我无法在服务器端验证期间显示错误消息。

_Layout.cshtml

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>@ViewData["Title"]</title>
<!-- Tell the browser to be responsive to screen width -->
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">

<!-- Bootstrap 3.3.7 -->
<link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css">
<!-- Font Awesome -->
<link rel="stylesheet" href="~/lib/font-awesome/css/font-awesome.min.css">
<!-- Ionicons -->
<link rel="stylesheet" href="~/lib/Ionicons/css/ionicons.min.css">
<!-- Theme style -->
<link rel="stylesheet" href="~/lib/adminlte/dist/css/AdminLTE.min.css">
<!-- AdminLTE Skins. Choose a skin from the css/skins
folder instead of downloading all of them to reduce the load. -->
<link rel="stylesheet" href="~/lib/adminlte/dist/css/skins/skin-blue.min.css">

<link rel="stylesheet" href="~/css/site.min.css" />
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<!-- Google Font -->
@*<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,700,300italic,400italic,600italic">*@

<!-- jQuery 3 -->
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>
<!-- Bootstrap 3.3.7 -->
<script src="~/lib/bootstrap/dist/js/bootstrap.min.js"></script>
<!-- SlimScroll -->
<script src="~/lib/jquery-slimscroll/jquery.slimscroll.min.js"></script>
<!-- FastClick -->
<script src="~/lib/fastclick/lib/fastclick.js"></script>
<!-- AdminLTE App -->
<script src="~/lib/adminlte/dist/js/adminlte.min.js"></script>
<script src="~/lib/PACE/pace.min.js"></script>
<script src="~/js/site.min.js"></script>
</head>
<body class="hold-transition skin-blue sidebar-mini">
<!-- Site wrapper -->
<div class="wrapper">

<!-- Top Menubar -->
@await Component.InvokeAsync("TopMenubar")

<!-- Left side column. contains the sidebar -->
@await Component.InvokeAsync("Sidebar")

<!-- Content Wrapper. Contains page content -->

<div class="content-wrapper">
<section class="content-header">
@await Component.InvokeAsync("ContentHeader")
<br />
@await Component.InvokeAsync("Alert")
</section>

<section class="content">
@RenderBody()
</section>
</div>

<!-- Footer -->
@await Component.InvokeAsync("Footer")

</div>
<!-- ./wrapper -->
@RenderSection("scripts", required: false)
<script>

</script>
@*<script>
$(document).ready(function () {
$('.sidebar-menu').tree()
})
</script>*@
</body>
</html>

索引.cshtml

@model MovieDb.Models.CategoryType

@{
ViewData["Title"] = "Category Type";
}

<link rel="stylesheet" href="~/lib/datatables.net-bs/css/dataTables.bootstrap.min.css" />
<script src="~/lib/datatables.net/js/jquery.dataTables.min.js"></script>
<script src="~/lib/datatables.net-bs/js/dataTables.bootstrap.min.js"></script>
<script src="~/js/categoryType.js"></script>


<div class="panel">
<div class="panel-body">
<button class="btn btn-primary" type="button" data-toggle="modal" data-target="#createNewEmergencyType"
onclick="clearTextBox();"><i class="fa fa-plus"> Add New Category</i></button>
</div>
</div>

<div class="box">
<div class="box-body table-responsive">
<table id="DgCategoryType" class="table table-bordered table-striped dataTable" role="grid">
<thead>
<tr>
<th>Name</th>
<th></th>
</tr>
</thead>
</table>
</div>
</div>
<div class="modal fade" id="createNewCategoryType" tabindex="-1" role="dialog"
aria-labelledby="Add New Category" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">

<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
&times;
</button>
<h4 class="modal-title">Add New Category</h4>
</div>

<div class="modal-body">
<form id="createCTForm">
@Html.AntiForgeryToken()

<div class="form-group">
<label asp-for="Name" class="control-label">Name:</label>
<input asp-for="Name" class="form-control" />
<span asp-validation-for="Name" class="text-danger"></span>
</div>

</form>
</div>

<div class="modal-footer">
<button type="button" class="btn btn-primary btn-fixed-width" id="btnAdd" onclick="return Add();">
Add
</button>
<button type="button" class="btn btn-default btn-fixed-width" data-dismiss="modal">
Close
</button>
</div>
</div>
</div>

</div>

categoryType.js

$(document).ready(function(){
loadData();
});

function loadData(){
$("#DgCategoryType").DataTable(

{
"filter": true,
"orderMulti": false,
"ajax":
{
"url":"/CategoryTypes/LoadData",
"type":"GET",
"dataType":"JSON"
},
"columns":[
{"data":"Name"},
{ "data":"Id",
"render":function(data){
return "<a class='popup' href='/CategoryTypes/Edit/"+data+"'>Edit</a> | <a class='popup' href='/CategoryTypes/Delete/"+data+"'>Delete</a>";
}
}
],
"columnDefs":
[
{
"targets": [1],
"searchable": false
},
{"width":"10%","targets":[1]}
]
}
);
}

function Add(){

/*var frm=document.getElementById("createCTForm");
var data=toJSONString(frm);*/

var data=$("#createCTForm").serialize();

$.ajax({
type:"POST",
url:"CategoryTypes/Create",
data:data,
success:function(result){
if(result.success)
{
$("#createNewCategoryType").modal("hide");
}
},
});
}

function clearTextBox(){
$("#Name").val("");
}

模型:CategoryType.cs

public class CategoryType
{
public int Id { get; set; }
[Required(ErrorMessage ="Category name required")]
public string Name { get; set; }
}

CategoryTypesController.cs

public class CategoryTypesController : BaseController
{
private readonly ApplicationDbContext _context;

public CategoryTypesController(ApplicationDbContext context)
{
_context = context;
}

protected override void Dispose(bool disposing)
{
if (disposing)
_context.Dispose();
base.Dispose(disposing);
}

// GET: CategoryTypes
public IActionResult Index()
{
AddPageHeader("Category Types");
return View(new CategoryType());
}

//GET JSON data for loading the datatable
public async Task<IActionResult> LoadData()
{
var data = await _context.CategoryTypes.ToListAsync();
return Json(new { data } );
}

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("Id,Name")] CategoryType categoryType)
{
if (ModelState.IsValid)
{
_context.Add(CategoryType);
await _context.SaveChangesAsync();
return Json(new { success=true });
}
return Json(new { success=false });
}
}

当我运行上面的代码时,它会将新类别添加到数据库中,但是如果我没有在模式输入框中输入名称,那么 Controller 将给出错误,但不会出现验证消息。

我做错了什么?

最佳答案

我最近也遇到了同样的问题。为了解决这个问题,我自己解决了这个问题,并创建了一个迷你库(如果你可以这样调用它)来验证输入。请从this JsFiddle获取代码。您可以在同一链接中找到一个工作示例。

注意:截至目前,它已经检查:必需、正则表达式、范围、等于。如果您需要帮助,您可以自行添加更多检查,或者评论,我会尽力提供帮助。

它是如何工作的:

1.在项目中创建一个js文件,并从fiddle链接粘贴js(最小代码由区域CustomValidationScript表示)。将此文件包含在您的 _layout.cshtml 中。

2.设置一些规则:

    var validationRules = [{ 
ruleName: "elementId1ShoudBeRequired", // make sure this
name will be unique within your rules
ruleForElementId: "#elementId1",
check: "required",
comparerValue: true,
message: "This input is required! Please make sure to input a value!"
},
{
ruleName: "elementId3ShouldBePhoneNr",
ruleForElementId: "#elementId2",
check: "regex",
comparerValue: /^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$/,
message: "Please provide a valid phone number!"
},
{
ruleName: "elementId4_ShouldBeEqualWith_5",
ruleForElementId: "#elementId2",
check: "equals",
comparerValue: 5,
message: "This input should be 5!"
}
];
var rangeRules = [{
ruleName: "elementId2ShoudBeInRange",
ruleForElementId: "#elementId2",
check: "range",
comparerValue: [1, 8],
message: "Please provide a value between 1 and 8 !"
}];
  • 在您的 js 文件/脚本中,在 $(document).ready() 函数之外初始化验证器:

     var validator = new CustomValidation(validationRules);
    // you can pass the validation rules in the initialization, or send a empty array if you wish to add the rules later
    // var validator = new CustomValidation([]);
  • (可选步骤)添加或删除更多验证规则:

     // Add rules
    // you can add them by passing an array of rules
    validator.addcustomValidationRules(rangeRules);
    // or by passing one rule
    validator.addcustomValidationRule(
    {
    ruleName: addRule.ruleName,
    ruleForElementId: addRule.ruleForElementId,
    check: addRule.check,
    comparerValue: addRule.comparerValue,
    message: addRule.message
    }
    );
    // if the rule(s) already exist(s), an error will be thrown

    // Remove rules
    // you can also remove some rules by ruleName, or sending an array of rules
    // for example we can remove rangeRules entirely like :
    validator.removeCustomValidationRules(rangeRules);
    // or we can remove individual rules by name like so:
    validator.removeCustomValidationRule("elementId2ShoudBeInRange");
  • 验证输入:

    var 结果 = validator.validate(validator);//将返回一个像这样的对象:{ formIsvalid : true/false,validationResults: [ {elementId: elementId,message: message}] }

    HTML 页面示例:

     <div class="container">
    <div class="form-group">
    <label>Input for elementId1 </label>
    <input id="elementId1" class="validate" />
    <span class="error_span col-md-12"></span>
    </div>
    <div class="form-group">
    <label>Input for elementId2 </label>
    <input id="elementId2" class="validate" />
    <span class="error_span"></span>
    </div>
    <button class="btn btn-outline-success" id="save">Save</button>
    </div>

    <script type="text/javascript">
    // you can validate the input inside listeners or inside whatever pieces of code

    // example onClick
    $("#save").on("click", function() {
    // the validation happerns here
    var result = validator.validate(validator);
    if (result.formIsValid) {
    // your code ...
    // can be ajax call to send the form to the server
    }
    else {
    // clear error_spans that might have been fixed between clicks
    updateUi(result.validationResults, "form-group", "error_span");
    }
    });

    // example onKeyUp
    $(".validate").on("keyup", function() {
    var result = validator.validate(validator);
    updateUi(result.validationResults, "form-group", "error_span");
    });

    </script>
  • 注意:updateUi(也可以在 JsFiddle 中找到)是一个自定义函数,用于更新错误范围以显示/隐藏。

    就是这样!

    我用 ajax 调用、select2、bootstrap 4 测试了它,它可以工作。

    如果您发现有需要改进的地方,请随时发表评论。 (我不是 js 专家,所以可能会发现错误。)

    祝你编码愉快!

    关于javascript - 引导模式+ajax+jquery+验证+.net core 2.0,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49678210/

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