How to preserve current view after api call - asp.net-web-api

Before asp.net core I would invoke a web api from a button by writing some jquery from behind the button click.
I would then handle the data returned from that api call.
Currently I have a view. this view contains a pop up window. In that window I have 3 div sections.
Login
Registration
ForgottenPassword
Focusing on Registration div I allow user to enter email/password/confirm password and let them press a button that calls my web api to validate this process.
So, this is my parent view snippet:
#model InformedWorker.Services.Models.Account
<div id="divLogForm" class="modal-dialog" style="display:none;position:absolute; ">
<div style="background-color: #fefefe;margin: auto;padding: 20px;border: 1px solid #888;">
<div class="modal-header">
<button id="btnClose" type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title" id="hdrTitle">LogIn</h4>
</div>
<div class="modal-body">
#{Html.RenderPartial("~/Views/Segments/_Registration.cshtml", Model.Registration);}
#{Html.RenderPartial("~/Views/Segments/_LogIn.cshtml", Model.LogIn);}
#{Html.RenderPartial("~/Views/Segments/_ForgottenRegistration.cshtml", Model.ForgottenloginDetails);}
</div>
</div>
</div>
My registration partial view is this:
#model InformedWorker.Services.Models.Registration
#*
*#
<div class="row" style="display:none" id="divRegistration">
<div class="col-xs-6">
<div class="well">
<div class="form-group">
<label asp-for="EmailAddress" class="control-label"></label>
<input type="text" class="form-control" id="EmailAddress" name="EmailAddress" value="#Model.EmailAddress" required="" title="Please enter you username" placeholder="example#gmail.com">
<span class="help-block"></span>
</div>
<div class="form-group">
<label asp-for="Password" class="control-label">Password</label>
<input type="password" class="form-control" id="Password" name="Password" value="" required="" title="Please enter your password">
<span class="help-block"></span>
</div>
<div class="form-group">
<label asp-for="ConfirmPassword" class="control-label"></label>
<input type="password" class="form-control" id="ConfirmPassword" name="ConfirmPassword" value="" required="" title="Please confirm your password">
</div>
<div id="registerErrorMsg" class="alert alert-error hide">Invalid registration</div>
<a asp-area="" asp-controller="api/Registration" asp-action="Register" class="btn btn-success btn-block">Register</a>
</div>
</div>
<div class="col-xs-6">
<p class="lead">Already Registered?</p>
<p><a onclick="showLogInPage();" class="btn btn-info btn-block">LogIn</a></p>
</div>
</div>
My account Model is this:
public class Account
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public long AccountId { get; set; }
public string AccountRef { get; set; }
[Display(Name = "Company Name")]
public string CompanyName { get; set; }
[Display(Name = "Email Address")]
[Required]
[RegularExpression(#"\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*", ErrorMessage = "Email address not found")]
[StringLength(60, MinimumLength = 3)]
public string EmailAddress { get; set; }
public string Salt { get; set; }
public string Hash { get; set; }
public bool Disabled { get; set; }
[Display(Name = "Date of Entry")]
public DateTime DOE { get; set; }
public ICollection<Client> Clients { get; set; }
public bool Activated { get; set; }
[NotMapped]
public Registration Registration { get; set; }
[NotMapped]
public LogIn LogIn { get; set; }
[NotMapped]
public ForgottenRegistration ForgottenRegistration { get; set; }
}
My homeController is this:
public IActionResult Index()
{
//var home = new Services.Models.Home();
//home.MyTest = _localizer["ActivationEmailSent"];
//return View(home);
var test = new Services.Models.Account();
test.Registration = new Services.Models.Registration();
test.Registration.EmailAddress = "aaa";
return View(test);
//return View(new Services.Models.Account());
}
My Registration Web api is this:
[Route("api/[controller]")]
public class Registration : Controller
{
// GET api/values/5
[HttpGet("{id}")]
public string Get(Registration Account)//int id)
{
return "Error in reg";
}
}
so my question is that when api is called the whole page page is replaced with 'value'.
how would I parse the data and populate the form fields with the result and preserve the original view?
Should i revert back to jquery and make api call that way?
Have I got this fundamentally wrong?
Thanks

Related

Edit method in ASP.NET Core 6 MVC

I am building an e-store web app using ASP.NET Core 6 MVC. I am trying to do CRUD operations with the help of some tutorial, everything went smoothly, but when I try to edit a product, it makes a copy of that edited item, instead of just replacing it.
Also, it asks me to upload a new image even though I want to set it not to ask for a new one, and there is a default (noimage.png) set if there is no image uploaded. Here is the edit method, please tell me where am going wrong.
public async Task<IActionResult> Edit(int id, Product product)
{
ViewBag.CategoryId = new SelectList(_context.Category.OrderBy(x => x.Sorting),
"Id", "Name", product.CategoryId);
// if (ModelState.IsValid)
// {
product.Slug = product.Name.ToLower().Replace(" ", "-");
var slug = await _context.Product
.Where(x => x.Id != id)
.FirstOrDefaultAsync(x => x.Slug == product.Slug);
if (slug != null)
{
ModelState.AddModelError("", "The product already exists.");
return View(product);
}
// Not mandatory to upload an image when editing
if (product.ImageUpload != null)
{
string uploadsDir = Path.Combine(webHost.WebRootPath, "media/products");
// If the image is not noimage.png then remove the existing image and upload a new one
if (!string.Equals(product.Image, "noimage.png"))
{
string oldImagePath = Path.Combine(uploadsDir, product.Image);
if (System.IO.File.Exists(oldImagePath))
{
System.IO.File.Delete(oldImagePath);
}
}
// Upload new image
string imageName = Guid.NewGuid().ToString() + "_" + product.ImageUpload.FileName;
string filePath = Path.Combine(uploadsDir, imageName);
FileStream fs = new FileStream(filePath, FileMode.Create);
await product.ImageUpload.CopyToAsync(fs);
fs.Close();
product.Image = imageName;
}
_context.Update(product);
await _context.SaveChangesAsync();
TempData["Success"] = "The product has been edited!";
return RedirectToAction("Index");
// }
// return View(product);
}
Product class
public class Product
{
public int Id { get; set; }
[Required, MinLength(2, ErrorMessage = "Minimum length 2")]
public string? Name { get; set; }
public string? Slug { get; set; }
[Column(TypeName = "decimal (18,2)")]
public decimal Price { get; set; }
[Display(Name = "Category")]
[Range(1, int.MaxValue, ErrorMessage = "You must choose a category")] //specific validation for category
public int? CategoryId { get; set; }
[Required, MinLength(2, ErrorMessage = "Minimum length 4")]
public string? Description { get; set; }
public string? Image { get; set; }
//To make the connection
[ForeignKey("CategoryId")]
public virtual Category? Category { get; set; }
[NotMapped] //to not show in the DB
[ImageExtention]
public IFormFile? ImageUpload { get; set; }
}
Edit view
#model Product
#{
ViewData["Title"] = "Edit Product";
}
<h1>Edit Product</h1>
<div class="row">
<div class="col-md-10">
<form asp-action="Edit" enctype="multipart/form-data">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
#*<input type="hidden" asp-for="Image" />*#
<div class="form-group">
<label asp-for="Name" class="control-label"></label>
<input asp-for="Name" class="form-control" />
<span asp-validation-for="Name" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Description" class="control-label"></label>
<textarea asp-for="Description" class="form-control"></textarea>
<span asp-validation-for="Description" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Price" class="control-label"></label>
<input asp-for="Price" class="form-control" />
<span asp-validation-for="Price" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="CategoryId" class="control-label"></label>
<select asp-for="CategoryId" asp-items="#ViewBag.CategoryId" class="form-control">
<option value="0">Choose a category</option>
</select>
<span asp-validation-for="CategoryId" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Image" class="control-label">Current Image</label>
<img src="~/media/products/#Model.Image" width="200" alt="" />
</div>
<div class="form-group">
<label asp-for="Image" class="control-label">New Product Image</label>
<input asp-for="ImageUpload" class="form-control" />
<img src="" id="imgpreview" class="pt-2" alt="" />
<span asp-validation-for="ImageUpload" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Edit" class="btn btn-primary" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
#section Scripts {
#{
await Html.RenderPartialAsync("_ValidationScriptsPartial");
}
<script>
$("#ImageUpload").change(function () {
readURL(this);
});
</script>
}
You need to make Id as Primary Key in Product
public class Product
{
[Key]
public int Id { get; set; }
//ommitted
}
You are not posting Id to Edit Method while Edit button clicked. So every time It is sending value of Id as 0. EntityFramework is considering it as new object.
Please add below code to cshtml view inside form. It will send correct value of existing product Id.
<input type="hidden" asp-for="Id" />

MVC How to Enumerate through a Second Model's Data

On the "Create" view I am trying to enumerate through some secondary/external model data. Instead, the page returns a NullReferenceError and I can't figure out why the Model is null. If I filter for IsNull on the enumerating fields that are null, the page will load.
Below is the Create functions inside the Controller:
public IActionResult Create()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("SOFT_ID,SOFT_NAME,DEPT_ID,IT_CONTACT,SOFT_EXP_DATE,SOFT_SUP_PERIOD,SOFT_OUT_OF_SERVICE,VEND_ID,SUPP_ID,SOFT_IS_RENEWED")] Software software)
{
if (ModelState.IsValid)
{
_context.Add(software);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
return View();
}
Next are the Models. Below is the Software model, which is the main model, and the Department model which is the secondary models. There are two other models I want to load data from and they are both set up exactly like the Department Model.
Software Model:
public class Software
{
[Key]
public int SOFT_ID { get; set; }
[Required]
[StringLength(50, ErrorMessage = "Software Name cannont be longer than 50 characters.")]
[Display(Name = "Software Name")]
public string SOFT_NAME { get; set; }
[Required]
public virtual Department DEPT_ID { get; set; }
[Required]
[Display(Name = "IT Contact")]
public string IT_CONTACT { get; set; }
[Required]
[Display(Name = "Expiration Date")]
[DataType(DataType.Date)]
public DateTime SOFT_EXP_DATE { get; set; }
[Required]
[Range(1,5)]
[Display(Name = "Support Period")]
public int SOFT_SUP_PERIOD { get; set; }
[Display(Name = "No Longer Used")]
public bool SOFT_OUT_OF_SERVICE { get; set; }
[Required]
public virtual Vendor VEND_ID { get; set; }
[Required]
public virtual Supplier SUPP_ID { get; set; }
[Display(Name = "Renewed?")]
public bool SOFT_IS_RENEWED { get; set; }
public IEnumerable<Department> Departments { get; set; }
public IEnumerable<Supplier> Suppliers { get; set; }
public IEnumerable<Vendor> Vendors { get; set; }
}
Department Model:
public class Department
{
[Key]
public int DEPT_ID { get; set; }
[Required]
[Display(Name = "Department Name")]
public string DEPT_NAME { get; set; }
[Required]
[Display(Name = "Department Contact Name")]
public string DEPT_CONTACT { get; set; }
[Required]
[Display(Name = "Email")]
public string DEPT_EMAIL { get; set; }
[Required]
[Display(Name = "Phone")]
public string DEPT_PHONE { get; set; }
}
And finally there is the View. The sections that are throwing the NullReferenceError are the #foreach loops for the departments, suppliers, and vendors. These are supposed to be populating drop down menus.
#model SoftwareManager_SSO.Models.Software
#{
ViewData["Title"] = "Create";
}
<h1>Create</h1>
<h4>Software</h4>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="SOFT_NAME" class="control-label"></label>
<input asp-for="SOFT_NAME" class="form-control" />
<span asp-validation-for="SOFT_NAME" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="DEPT_ID.DEPT_NAME" class="control-label"></label>
<select class="form-control">
<option value="" disabled selected>Select A Dept</option>
#foreach (var item in Model.Departments)
{
<option value="#item.DEPT_ID">#item.DEPT_NAME</option>
}
</select>
<span asp-validation-for="DEPT_ID.DEPT_NAME"></span>
</div>
<div hidden="hidden" class="form-group">
<label asp-for="DEPT_ID" class="control-label"></label>
<input asp-for="DEPT_ID" class="form-control" disabled="disabled" />
<span asp-validation-for="DEPT_ID" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="DEPT_ID.DEPT_CONTACT" class="control-label"></label>
<input id="dept_contact" asp-for="DEPT_ID.DEPT_CONTACT" disabled="disabled" class="form-control" />
<span asp-validation-for="DEPT_ID.DEPT_CONTACT" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="IT_CONTACT" class="control-label"></label>
<select class="form-control">
<option value="" selected>Select IT Person</option>
<option value="uciltas#tohowater.com">Umit Ciltas</option>
<option value="sslaven#tohowater.com">Stephen Slaven</option>
<option value="imoreno#tohowater.com">Ismael Moreno</option>
<option value="dkearney#tohowater.com">David Kearney</option>
</select>
<span asp-validation-for="IT_CONTACT" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="SOFT_EXP_DATE" class="control-label"></label>
<input asp-for="SOFT_EXP_DATE" class="form-control" />
<span asp-validation-for="SOFT_EXP_DATE" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="SOFT_SUP_PERIOD" class="control-label"></label>
<select class="form-control">
<option value="" selected>Select A Support Period</option>
<option value="1">1 Year</option>
<option value="2">2 Years</option>
<option value="3">3 Years</option>
<option value="4">4 Years</option>
<option value="5">5 Years</option>
</select>
<span asp-validation-for="SOFT_SUP_PERIOD" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="VEND_ID.VEND_NAME" class="control-label"></label>
<select class="form-control">
<option value="" disabled selected>Select a Vendor</option>
#foreach (var item in Model.Vendors)
{
<option value="#item.VEND_ID">#item.VEND_NAME</option>
}
</select>
<span asp-validation-for="VEND_ID.VEND_NAME"></span>
</div>
<div class="form-group">
<label asp-for="SUPP_ID.SUPP_NAME" class="control-label"></label>
<select class="form-control">
<option value="" disabled selected>Select a Vendor</option>
#foreach (var item in Model.Suppliers)
{
<option value="#item.SUPP_ID">#item.SUPP_NAME</option>
}
</select>
<span asp-validation-for="SUPP_ID.SUPP_NAME"></span>
</div>
<div class="form-group form-check">
<label class="form-check-label">
<input class="form-check-input" asp-for="SOFT_IS_RENEWED" /> #Html.DisplayNameFor(model => model.SOFT_IS_RENEWED)
</label>
</div>
<div class="form-group form-check">
<label class="form-check-label">
<input class="form-check-input" asp-for="SOFT_OUT_OF_SERVICE" /> #Html.DisplayNameFor(model => model.SOFT_OUT_OF_SERVICE)
</label>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-primary" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
#section Scripts {
#{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}
I am quite honestly at a loss and can't figure this out. I've read through numerous other posts on this site and I can't figure out what is different between my code and similar code that I've seen posted. I will continue to search though posts, but any help is appreciated.
You need to pass the information about those departments into the view. This is typically done by creating a viewmodel and passing it to the view.
In your code, your view is expecting a "software" model, so you could create one (and be sure to populate "departments") and pass that into your view.
Once you have the model, you could use a Html helper to generate the drop-down, rather than manually building it using a loop.
For example:
#Html.DropDownListFor(model => model.departments )
Or maybe
#Html.DropDownListFor(model => model.departments as selectlist)
Sorry if some syntax not quite right, on my mobile so can't check very well. But that should give you the right idea.
EDIT
You need to build the view model in your controller and pass it to the view.
var viewModel = new Software();
viewModel.Departments = new List<Department>() {
new Department() { DEPT_NAME = "Some department name"}
};
return View(viewModel);
Or if pulling dynamically from database (for example via entity framework):
var viewModel = new Software();
viewModel.Departments = _db.Departments.ToList()
return View(viewModel);

Model Validation Not Working on Multiple Models in Single View | in Asp.Net Core MVC

I need to do validation in the view where I sent 2 different models. I implemented this to be able to use 2 different models in a single view.
Dish.cs
public class Dish
{
public int DishId { get; set; }
[Required(ErrorMessage = "req")]
public Category Category { get; set; }
[Required(ErrorMessage = "req")]
public string DishName { get; set; }
[Required(ErrorMessage = "req")]
public string Description { get; set; }
}
Category.cs
public class Category
{
public int CategoryId { get; set; }
public string CategoryName { get; set; }
}
DishCategoriesModel.cs
public class DishCategoriesModel
{
public Dish Dish { get; set; }
public List<Category> Categories { get; set; }
}
Add.cshtml
#model DishCategoriesModel
#{
ViewData["Title"] = "Add";
}
<div class="row">
<div class="col-md-4">
<form asp-action="Add" enctype="multipart/form-data">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="Dish.DishName" class="control-label"></label>
<input asp-for="Dish.DishName" class="form-control" />
<span asp-validation-for="Dish.DishName" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Dish.Category.CategoryId" class="control-label"></label>
<select class="form-control" asp-for="Dish.Category.CategoryId">
<option selected disabled>Select Category...</option>
#foreach (var item in Model.Categories)
{
<option value="#item.CategoryId">#item.CategoryName</option>
}
</select>
<span asp-validation-for="Category.CategoryId" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Dish.Description" class="control-label"></label>
<input asp-for="Dish.Description" class="form-control" />
<span asp-validation-for="Dish.Description" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Add" class="btn btn-primary" />
</div>
</form>
</div>
</div>
DishController.cs
[HttpGet]
public IActionResult Add()
{
List<Category> categories = categoryService.GetAll();
DishCategoriesModel model = new DishCategoriesModel
{
Categories = categories
};
return View(model);
}
[HttpPost]
public IActionResult Add(DishCategoriesModel model)
{
dishService.Add(model.Dish);
return View(model);
}
When I sent a single model to View, validations were working, but if I made it like above, it doesn't work. What is the right way?
you don't have any requirements on category , this is why this part is not working
Try to fix your Dish class by adding CategoryId:
public class Dish
{
public int DishId { get; set; }
[Range(1, 100000, ErrorMessage="req")]
public int? CategoryId { get; set; }
public virtual Category Category { get; set; }
[Required(ErrorMessage = "req")]
public string DishName { get; set; }
[Required(ErrorMessage = "req")]
public string Description { get; set; }
}
public class Category
{
public int CategoryId { get; set; }
[Required(ErrorMessage = "req")]
public string CategoryName { get; set; }
public virtual ICollection<Dish> Dishes { get; set; }
}
and view:
<label asp-for="Dish.CategoryId" class="control-label"> Categories </label>
<select class="form-control" asp-for="Dish.CategoryId">
.....
<span asp-validation-for="Dish.CategoryId" class="text-danger"></span>
and add server side validation too
public IActionResult Add(DishCategoriesModel model)
{
if (ModelState.IsValid)
{
//...your code
}
Change your view like below:
<form asp-action="Add" enctype="multipart/form-data">
//...
<div class="form-group">
<label asp-for="Dish.Category.CategoryId" class="control-label"></label>
<select class="form-control" asp-for="Dish.Category.CategoryId">
<option selected disabled>Select Category...</option>
#foreach (var item in Model.Categories)
{
<option value="#item.CategoryId">#item.CategoryName</option>
}
</select>
//change here.....
<span asp-validation-for="Dish.Category.CategoryId" class="text-danger"></span>
</div>
//...
</form>
Be sure add jquery.validate.js and jquery.validate.unobtrusive.js in your razor view like below:
#section Scripts {
#{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}
Result:

How to Create Drop-Down-List from Database in (Asp.net Core - MVC)?

I have 2 models:
News Model
TypeOfNew Model
with (one to many relationship), every (TypeOfNew) has one or multiple news.
News Model:
public class News
{
[Required(ErrorMessage = "ID إجباري.")]
[Key]
public int ID { get; set; }
[Required(ErrorMessage = "الحقل إجباري.")]
[Display(Name = "عنوان الخبر")]
public string Title { get; set; }
[Required(ErrorMessage = "الحقل إجباري.")]
[Display(Name = "مصدر الخبر")]
public string Source { get; set; }
[Required(ErrorMessage = "الحقل إجباري.")]
[Display(Name = "الوصف")]
[MaxLength(5000)]
public string Description { set; get; }
[Display(Name = "نوع الخبر")]
public int NewsTypeId { set; get; }
public TypeOfNew TypeOfNew { set; get; }
}
TypeOfNew Model:
public class TypeOfNew
{
[Key]
public int TypeId { set; get; }
[Display(Name = " نوع الخبر")]
public string TypeName { set; get; }
public ICollection<News> News { get; set; }
}
in Create View(News), I want to display drop-down-list of (TypeOfNew).
so when I post (Create View) I want to store (TypeId) of (TypeOfNew model) in (NewsTypeId) of (News model).
So, what should I do in:
create Action (Get).
create Action (Post).
Create View.
Assume that you have set below tables in dbcontext:
public DbSet<News> News { get; set; }
public DbSet<TypeOfNew> TypeOfNews { get; set; }`
You could refer to below steps to achieve your requirements:
1.Create action GET
public IActionResult Create()
{
ViewData["NewsTypeId"] = new SelectList(_context.TypeOfNews, "TypeId", "TypeName");
return View();
}
2.Create action POST
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("ID,Title,Source,Description,NewsTypeId")] News news)
{
if (ModelState.IsValid)
{
_context.Add(news);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
ViewData["NewsTypeId"] = new SelectList(_context.TypeOfNews, "TypeId", "TypeName", news.NewsTypeId);
return View(news);
}
3.Create View
#model News
<h1>Create</h1>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="Title" class="control-label"></label>
<input asp-for="Title" class="form-control" />
<span asp-validation-for="Title" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Source" class="control-label"></label>
<input asp-for="Source" class="form-control" />
<span asp-validation-for="Source" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Description" class="control-label"></label>
<input asp-for="Description" class="form-control" />
<span asp-validation-for="Description" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="NewsTypeId" class="control-label"></label>
<select asp-for="NewsTypeId" class="form-control" asp-items="#ViewBag.NewsTypeId"></select>
<span asp-validation-for="NewsTypeId" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-primary" />
</div>
</form>
</div>
For configuring one-to-many relationships,you could refer to
https://learn.microsoft.com/en-us/ef/core/modeling/relationships#definition-of-terms

Remote validation fails with IFormFile attribute

I notice that remote validation in ASP.NET core always fails because the server always receives a null IFormFile in the controller method. Is there a way to make it work?. Some code to reproduce the problem:
The model class ("not mapped" was included so Entity Framework doesn't interfere, but it also didn't work in another project without Entity Framework.
public class Movie
{
public int ID { get; set; }
[Sacred(sacredWord: "sonda")]
public string Title { get; set; }
[Display(Name = "Release Date")]
[DataType(DataType.Date)]
public DateTime ReleaseDate { get; set; }
public string Genre { get; set; }
[Column(TypeName = "decimal(18, 2)")]
public decimal Price { get; set; }
[Remote(action: "VerifyRating", controller: "Movies")]
public string Rating { get; set; }
[NotMapped]
[Remote(action: "VerifyFile", controller: "Movies"),Required]
public IFormFile File { get; set; }
}
The controller
public class MoviesController : Controller
{
private readonly WebAppMVCContext _context;
public MoviesController(WebAppMVCContext context)
{
_context = context;
}
// GET: Movies/Create
public IActionResult Create()
{
return View();
}
[AcceptVerbs("Get", "Post")]
public IActionResult VerifyFile(IFormFile File)
{
if(File == null)
{
return Json("The file is null");
}
else
{
return Json("The file is not null");
}
}
// POST: Movies/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("ID,Title,ReleaseDate,Genre,Price,Rating")] Movie movie)
{
if (ModelState.IsValid)
{
_context.Add(movie);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
return View(movie);
}
[AcceptVerbs("Get", "Post")]
public IActionResult VerifyRating( int rating)
{
if(rating>0 && rating < 10)
{
return Json(true);
}
else
{
return Json($"The rating is invalid");
}
}
and the View
#model WebAppMVC.Models.Movie
#{
ViewData["Title"] = "Create";
}
<h2>Create</h2>
<h4>Movie</h4>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="Title" class="control-label"></label>
<input asp-for="Title" class="form-control" />
<span asp-validation-for="Title" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="ReleaseDate" class="control-label"></label>
<input asp-for="ReleaseDate" class="form-control" />
<span asp-validation-for="ReleaseDate" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Genre" class="control-label"></label>
<input asp-for="Genre" class="form-control" />
<span asp-validation-for="Genre" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Price" class="control-label"></label>
<input asp-for="Price" class="form-control" />
<span asp-validation-for="Price" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Rating" class="control-label"></label>
<input asp-for="Rating" class="form-control" />
<span asp-validation-for="Rating" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="File" class="control-label"></label>
<input asp-for="File" />
<span asp-validation-for="File" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
#section Scripts{
#{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
<script type="text/javascript">
$.validator.addMethod('sacred',
function (value, element, params) {
var title = $(params[0]).val(),
sacredword = params[1];
if (title!=null && title == sacredword) {
return true;
}
else {
return false;
}
}
);
$.validator.unobtrusive.adapters.add('sacred',
['sacredword'],
function (options) {
var element = $(options.form).find('input#Title')[0];
options.rules['sacred'] = [element, options.params['sacredword']];
options.messages['sacred'] = options.message;
}
);
</script>
}
Notice that all the other validations work (including the remote validation "VerifyRating").

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