Passing object from AngularJS to ASP.NET MVC Controller - asp.net-mvc

I'm trying to pass some data to my MVC controller from AngularJS but the Customer object is always null on the MVC controller. What am I missing?
Angular
$scope.new = {};
$scope.AddCustomer = function () {
$http.post('/Customer/SaveCustomer', $scope.new).success(function () {
});
}
HTML
<input class="form-control" type="text" placeholder="CustomerID" ng-model="new.c.CustomerID" />
<input class="form-control" type="text" placeholder="CompanyName" ng-model="new.c.CompanyName" />
<button type="button" class="btn btn-primary" ng-click="AddCustomer()">Save</button>
C#
[HttpPost]
public void SaveCustomer(Customer customer)
{
....
}
public class Customer
{
public string CustomerID { get; set; }
public string CompanyName { get; set; }
}

Update your HTML like this :
Change new.c.CustomerID to new.CustomerID
<input class="form-control" type="text" placeholder="CustomerID" ng-model="new.CustomerID" />
<input class="form-control" type="text" placeholder="CompanyName" ng-model="new.CompanyName" />
Now this will work
$http.post('/Customer/SaveCustomer', $scope.new).success(function () {
});

First mind the camel case in javascript object
$scope.new = {
customerID: '',
companyName: ''
};
$scope.AddCustomer = function() {
$http.post('/Customer/SaveCustomer', $scope.new).success(function() {});
<!--check the changes in ng-model-->
<input class="form-control" type="text" placeholder="CustomerID" ng-model="new.customerID" />
<input class="form-control" type="text" placeholder="CompanyName" ng-model="new.companyName" />
<button type="button" class="btn btn-primary" ng-click="AddCustomer()">Save</button>
<!--Best of Luck-->

Your model seems to be
new = {
c : {
CustomerID : '',
CompanyName : ''
}
}
Which doesn't map to your Customer class. You should refer to new.CustomerID and new.CompanyName. Futhermore I would avoid using the new keyword as variable name.

Related

I have a question how to add input fields values with same name into the database using entity framework? Below is my code,

This is my HomeWithIndentityController
namespace MVC.CRUDDynamicFormTest.Controllers
{
public class HomeWithIndentityController : Controller
{
// GET: HomeWithIndentity
public ActionResult WithIndex()
{
return View();
}
public ActionResult GetData()
{
using (DynamicCRUDDatabase2Entities db = new DynamicCRUDDatabase2Entities())
{
List<DynamicCRUDTable2> dynamicCRUDTable2s = db.DynamicCRUDTable2.ToList<DynamicCRUDTable2>();
return Json(new { data = dynamicCRUDTable2s }, JsonRequestBehavior.AllowGet);
}
}
[HttpGet]
public ActionResult Add(int id = 0)
{
return View(new DynamicCRUDTable2());
}
[HttpPost]
public ActionResult Add(DynamicCRUDTable2 obj)
{
using (DynamicCRUDDatabase2Entities db = new DynamicCRUDDatabase2Entities())
{
db.DynamicCRUDTable2.Add(obj);
db.SaveChanges();
return Json(new { succces = true, message = "saved Successfully" }, JsonRequestBehavior.AllowGet);
//return RedirectToAction("Index", "Home");
}
}
}
}
this is my entity model class
public partial class DynamicCRUDTable2
{
public int Id { get; set; }
public string FirstName { get; set; }
}
This my View
<form action="~/HomeWithIndentity/Add" method="POST" onsubmit="return Submitform(this)">
<input data-val="true" id="Id" name="Id" type="hidden" />
<label>First Name</label>
<input type="text" name="FirstName[]" class="form-control" />
<input type="text" name="FirstName[]" class="form-control" />
<br />
<br />
<div>
<input type="submit" value="Submit" class="btn btn-success" />
<input type="reset" value="Reset" class="btn btn-danger" />
<a class="btn btn-danger" href="~/Home/Index">Cancel</a>
</div>
</form>
In the above view i want to add the firstname input field values to the Database dynamicallly.but it does not working can you let me know why?What errors i have done.
does anyone know how to do that?

Asp.Net MVC Core built-in tag helpers won't process attributes provided from custom taghelpers

Out of boredom of writing the same boilerplate forms, I thought I'd rather write a tag helper that would produce attributes that can be processed from stock tag helpers. But, even though I managed to get my tag helper before work before form tag helpers, form tag helpers won't process the ones that I produce.
Here is the cshtml:
#model City
#{
Layout = "_Layout";
ViewData["Title"] = "Create City";
}
<form method="post" asp-action="Create">
#foreach (string propName in BaseModel.GetProperties<City>()) {
<formgroup for="#propName" />
}
<div class="form-group">
<label asp-for="Name">Name:</label>
<input class="form-control" asp-for="Name" />
</div>
<div class="form-group">
<label asp-for="Country">Country:</label>
<input class="form-control" asp-for="Country" />
</div>
<div class="form-group">
<label asp-for="Population">Population:</label>
<input class="form-control" asp-for="Population" />
</div>
<button type="submit" class="btn btn-primary">Create</button>
<a class="btn btn-secondary" asp-controller="Home" asp-action="Index">Cancel</a>
</form>
Here is the output:
<form method="post" action="/City/Create">
<div class="form-group"><label asp-for="Name"></label><input asp-for="Name" class="form-control"></div>
<div class="form-group"><label asp-for="Country"></label><input asp-for="Country" class="form-control"></div>
<div class="form-group"><label asp-for="Population"></label><input asp-for="Population" class="form-control"></div>
<div class="form-group">
<label for="Name">Name:</label>
<input class="form-control" type="text" id="Name" name="Name" value="">
</div>
<div class="form-group">
<label for="Country">Country:</label>
<input class="form-control" type="text" id="Country" name="Country" value="">
</div>
<div class="form-group">
<label for="Population">Population:</label>
<input class="form-control" type="number" data-val="true" data-val-required="The Population field is required." id="Population" name="Population" value="">
</div>
<button type="submit" class="btn btn-primary">Create</button>
<a class="btn btn-secondary" href="/">Cancel</a>
<input name="__RequestVerificationToken" type="hidden" value="CfDJ8M_6usK6CRRNkwluTiTW8uaAAfhMcU9tAxyCT7z55zQKmpUwpi_lfSDIN4FrlMo9cE3Ka9zgX4WdpXHUdlBFVGsLIw7h_cR3FjJb6Vjqnjm8mQmtKTey_9l188p9E2sKgiksO_OB6K9-F1D7SP2lX0g"></form>
Here is my tag helper:
using Microsoft.AspNetCore.Html;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Threading.Tasks;
namespace ViewComponents.Infrastructure.TagHelpers {
[HtmlTargetElement("formgroup", Attributes = "for", TagStructure = TagStructure.NormalOrSelfClosing)]
public class FormGroupTagHelper : TagHelper {
/// <inheritdoc />
public override int Order => -2000;
[HtmlAttributeNotBound]
[ViewContext]
public ViewContext ViewContext { get; set; }
protected IHtmlGenerator Generator { get; }
public string For { get; set; }
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output) {
if (context == null) {
throw new ArgumentNullException(nameof(context));
}
if (output == null) {
throw new ArgumentNullException(nameof(output));
}
// So that other tag helpers are processed after me...
var childContent = await output.GetChildContentAsync();
// Starting up...
// Replace the tag name, include the form-group bootstrap class.
output.TagName = "div";
output.TagMode = TagMode.StartTagAndEndTag;
output.Attributes.Add("class", "form-group");
PropertyInfo propInfo = ViewContext.ViewData.ModelMetadata.ModelType.GetTypeInfo().GetDeclaredProperty(For);
output.Content.AppendHtml(GenerateLabel(new Dictionary<string, string> { ["asp-for"] = propInfo.Name }));
output.Content.AppendHtml(GenerateInput(new Dictionary<string, string> { ["asp-for"] = propInfo.Name, ["class"] = "form-control" }));
}
public static IHtmlContent GenerateLabel(IReadOnlyDictionary<string, string> attrDict) {
TagBuilder tBuilder = new TagBuilder("label");
foreach (var kvp in attrDict)
tBuilder.Attributes.Add(kvp);
return tBuilder;
}
public static IHtmlContent GenerateInput(IReadOnlyDictionary<string, string> attrDict) {
TagBuilder tBuilder = new TagBuilder("input");
foreach (var kvp in attrDict)
tBuilder.Attributes.Add(kvp);
return tBuilder;
}
}
}
Any help will be appreciated.
Have a nice one!
Tag Helpers aren't processed in a specific order, so you cannot count on one being able to do something based on the output of the other. Each tag helper needs to be designed to work independently of any other, so if you need to render HTML, you'll need to handle that yourself in your tag helper. However, since you're trying to have one tag generate any kind of form field, that's going to be a heavy lift. This is basically beyond the scope of what a tag helper is intended for.

can default model binder generate IEnumerable<FormItem>?

server:
public class FormItems
{
public IEnumerable<MyClass> Values { get; set; }
}
client:
<form id="myform" action="/" method="post">
<!-- Those inputs could be added dynamically -->
<input type="text" name="[0].Value" />
<input type="text" name="[1].Value" />
<input type="text" name="[2].Value" />
<input type="text" name="[3].Value" />
<button type="submit">OK</button>
</form>
and finally AJAXify the form:
$(function() {
$('#myform').submit(function() {
var form = $(this);
$.ajax({
url: form.attr('action'),
type: form.attr('method'),
data: form.serialize(),
success: function(result) {
}
});
});
});
How can I use default model binder get the ajax data into strongly typed IEnumerable?
[HttpPost]
public JsonResult Save(FormItems data)
Assuming MyClass is something like this
public class MyClass
{
public string Value { get; set; }
}
Your html should look like this (note that name of each value input is prefixed by matching enumerable property name in FormItems)
< form id="myform" action="/" method="post">
<!-- Those inputs could be added dynamically -->
<input type="text" name="Values[0].Value" />
<input type="text" name="Values[1].Value" />
<input type="text" name="Values[2].Value" />
<input type="text" name="Values[3].Value" />
<button type="submit">OK</button>
</form>

how to Post list using ajax

My problem here is how to send the list values to the controller upon an ajax post. With my actual code, the list is null on post.
My view:
#using (Html.BeginForm("UsersList", "Project", FormMethod.Post, new { id = "Users" }))
{
<div id="MyList" >
<table>
<thead>
<tr><th></th><th>User</th><th>End date</th></tr>
</thead>
#Html.EditorFor(x => x.GetUsers)
</table>
</div>
<script type="text/javascript">
$(function () {
$('#MyList).dialog({
autoOpen: false,
width: 820,
buttons: {
"Save": function () {
$("#Users").submit();
},
"Cancel": function () {
$(this).dialog("close");
}
}
});
</script>
Model:
public class ProjectModel
{
public List<ProjectList>GetUsers{get;set;}
}
public class ProjectList
{
public bool Selected { get; set; }
public int UserID { get; set; }
}
My controller:
[HttpPost]
public ActionResult UsersList(ProjectModel model)
{
return View(model);
}
Sending a list can be difficult. I think MVC 3.0 has (in-built) support for sending JSON to the controller which would make this easier.
However with prior versions I think this article should be what your looking for:
http://haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx
Effectively you give everything in the list the same name in your HTML (as the name will be what gets sent in the key/value string that gets sent and it will bind as a list.
For more complex items you name each object property but add an index to show which object they get attached too:
<form method="post" action="/Home/Create">
<input type="text" name="[0].Title" value="Curious George" />
<input type="text" name="[0].Author" value="H.A. Rey" />
<input type="text" name="[0].DatePublished" value="2/23/1973" />
<input type="text" name="[1].Title" value="Code Complete" />
<input type="text" name="[1].Author" value="Steve McConnell" />
<input type="text" name="[1].DatePublished" value="6/9/2004" />
<input type="text" name="[2].Title" value="The Two Towers" />
<input type="text" name="[2].Author" value="JRR Tolkien" />
<input type="text" name="[2].DatePublished" value="6/1/2005" />
<input type="submit" />

model binding of non-sequential arrays

I am having a table in which i`m dynamically creating and deleting rows. How can I change the code such that the rows be added and deleted and the model info property filled accordingly.
Bearing in mind that the rows can be dynamically created and deleted, I may have Info[0], Inf0[3], info[4]... My objective is to be able to bind the array even if it`s not in sequence.
Model
public class Person
{
public int[] Size { get; set; }
public string[] Name { get; set; }
public Info[]info { get; set; }
}
public class Info
{
public string Address { get; set; }
public string Tel { get; set; }
View
<script type="text/javascript" language="javascript">
$(function () {
var count = 1;
$('#AddSize').live('click', function () {
$("#divSize").append('</br><input type="text" id="Size" name="Size" value=""/><input type = "button" id="AddSize" value="Add"/>');
});
$('#AddName').live('click', function () {
$("#divName").append('</br><input type="text" id="Name" name="Name" value=""/><input type = "button" id="AddName" value="Add"/>');
});
$('#AddRow').live('click', function () {
$('#details').append('<tr><td>Address</td><td> <input type="text" name="Info[' + count + '].Address"/></td><td>Tel</td><td><input type="text" name="Info[' + count++ + '].Tel"/></td> <td><input type="button" id="AddRow" value="Add"/> </td></tr>');
});
});
</script>
</head>
<body>
<form id="closeForm" action="<%=Url.Action("Create",new{Action="Create"}) %>" method="post" enctype="multipart/form-data">
<div id="divSize">
<input type="text" name="Size" value=""/> <input type="button" value="Add" id="AddSize" />
</div>
<div id="divName">
<input type="text" name="Name" value=""/> <input type="button" value="Add" id="AddName" />
</div>
<div id="Tab">
<table id="details">
<tr><td>Address</td><td> <input type="text" name="Info[0].Address"/></td><td>Tel</td><td><input type="text" name="Info[0].Tel"/></td> <td><input type="button" id="AddRow" value="Add"/> </td></tr>
</table>
</div>
<input type="submit" value="Submit" />
</form>
</body>
}
Controller
public ActionResult Create(Person person)
{
return new EmptyResult();
}
Here's a nice blog post that you might find helpful.

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