I created a simple search engine with a controller that has a method that will accept the student parameter
this is my razor page code
<form method="post">
<div class="row form-group text-center">
<div class="col-md-3">
<input placeholder="Город" class="form-control" asp-for="#Model.Profession" />
</div>
<div class="col-md-2">
<input placeholder="Город" class="form-control" asp-for="#Model.City" />
</div>
<div class="col-md-2">
<input placeholder="Курс" class="form-control mdl-textfield__input" asp-for="#Model.Course" />
</div>
<div class="col-md-2">
<input placeholder="Специализация" class="form-control" asp-for="#Model.Specialization" />
</div>
<div class="col-md-2">
<input type="submit" value="Поиск" class="btn btn-primary " />
</div>
</div>
</form>
this is UserModel
public List<Student> Students { get; set; }
public string Profession { get; set; }
public string City { get; set; }
public int Course { get; set; }
public string Specialization { get; set; }
my controllers GET and POST
[Route("Index")]
[HttpGet]
public IActionResult Index()
[Route("Index")]
[HttpPost]
public IActionResult Index(UserModel model)
after search my rout Search/Index without parametrs. how to create rout like Search/Index/Profession=Coder/City=London/Course=4/Specialization=Code . my route is static and i can`t go to back or copy url. but i catch Document Expired
sorry my bad English.
Below is a basic example
[RoutePrefix("Search")] //place this routeprefix since "Search' is common
public class TestController: Controller
{
[Route("Index")] // "Search/Index" route for GET
[HttpGet]
public IActionResult Index()
[Route("Index")] // "Search/Index" route for POST
[HttpPost]
public IActionResult Index(UserModel model)
Now for Search/Index/Profession=Coder/City=London/Course=4/Specialization=Code.
firstly as per my understanding it should be as below.
Please check carefully.
Search/Index?Profession=Coder&City=London&Course=4&Specialization=Code.
Explanation about the above route. After Index it contains ? which suggests that querystring follows after ?. Also Profession=Coder is one pair of querystring and is followed with & suggesting that there is another querstring which is City=London, followed by & suggesting that there is another querstring which is Course=4, henceforth.
And the route defined is as below
[Route("Index/{Profession=Profession}/{City=City}/{Course=Course}/{Specialization=Specialization}")]
[HttpGet]
public IActionResult Profession(string Profession,string City,int Course,string Specialization)
Related
Very new to MVC Core and C# and just as I think I'm getting the hang of something there's a new curve ball. I have a form which is based on a model which has a foreign key. When I submit the form to the controller the modelState is invalid because the form is passing something back which isn't in the model it is based on. Here is the model:
public partial class Agreement
{
public Agreement()
{
AgreementAmendments = new HashSet<AgreementAmendment>();
Bundles = new HashSet<Bundle>();
Invoices = new HashSet<Invoice>();
}
public int Id { get; set; }
public int OrgId { get; set; }
public string AgreementNumber { get; set; } = null!;
public string? IrespondReference { get; set; }
public string? DocumentLink { get; set; }
public virtual Organization Org { get; set; }
public virtual ICollection<AgreementAmendment> AgreementAmendments { get; set; }
public virtual ICollection<Bundle> Bundles { get; set; }
public virtual ICollection<Invoice> Invoices { get; set; }
}
This is the Get Create Action Method:
public IActionResult Create()
{
ViewData["OrgId"] = new SelectList(_context.Organizations, "Id", "ShortName");
return View();
}
This is the form:
<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="OrgId" class="control-label">Organization</label>
<select asp-for="OrgId" class ="form-control" asp-items="ViewBag.OrgId"></select>
</div>
<div class="form-group">
<label asp-for="AgreementNumber" class="control-label">Agreement Number</label>
<input asp-for="AgreementNumber" class="form-control" />
<span asp-validation-for="AgreementNumber" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="IrespondReference" class="control-label">Internal Reference</label>
<input asp-for="IrespondReference" class="form-control" />
<span asp-validation-for="IrespondReference" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="DocumentLink" class="control-label">Document Link</label>
<input asp-for="DocumentLink" class="form-control" />
<span asp-validation-for="DocumentLink" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-primary" />
</div>
</form>
</div>
</div>
And this is the HttpPost Create Action Method:
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("OrgId,AgreementNumber,IrespondReference,DocumentLink")] Agreement agreement)
{
if (ModelState.IsValid)
{
_context.Add(agreement);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
ViewData["OrgId"] = new SelectList(_context.Organizations, "Id", "Id", agreement.OrgId);
return View();
}
When I look at the results of the ModelState it shows an error with the Org Key but as far as I can see the form should just be returning the OrgId as per the model. Can someone please let me know where I am going wrong.
Created a View Model for Agreements to handle the form input and then passed that to the base Agreement Model which seems like unnecessary work. Why can't EF Core handle this stuff without having to constantly build View Models just because there is a foreign key?
Anyway, this is the final HttpPost code for others who run into the same issue:
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(AgreementWriteViewModel newagreement)
{
if (ModelState.IsValid)
{
var model = new Agreement
{
OrgId = newagreement.OrgId,
AgreementNumber = newagreement.AgreementNumber,
IrespondReference = newagreement.IrespondReference,
DocumentLink = newagreement.DocumentLink,
};
_context.Add(model);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
ViewData["OrgId"] = new SelectList(_context.Organizations, "Id", "ShortName", newagreement.OrgId);
return View();
}
I'm trying to build one view that includes all (Create, Edit, Delete, and Index) in one View which is Index.
The problem is with Editing. Always returns null to the controller as shown in the gif.
I have Model and ViewModel as follows.
The Model BootstrapCategory
public class BootstrapCategory
{
[Key]
public Guid Id { get; set; }
[MaxLength(20)]
[Required]
public string Category { get; set; }
}
The ViewModel VMBPCategoris
public class VMBPCategoris
{
public List<BootstrapCategory> bootstrapCategories { get; set; }
public BootstrapCategory bootstrapCategory { get; set; }
}
The View
Note: Edit not by the usual button in the table it instead by another
button as shown in the gif
#model VMBPCategoris
#foreach (var item in Model.bootstrapCategories)
{
<tr>
<td>
<form asp-action="Edit" method="post">
<input type="hidden" asp-for="#item.Id" />
<div class="#item.Id d-none">
<div class="input-group">
<input id="btnGroupEdit" type="submit" value="Save" class="input-group-text btn btn-primary" />
<input asp-for="#item.Category" class="form-control" aria-label="Input group example" aria-describedby="btnGroupEdit">
</div>
<span asp-validation-for="#item.Category" class="text-danger"></span>
</div>
</form>
<div class="#item.Id">
#Html.DisplayFor(modelItem => item.Category)
</div>
</td>
<td>
Edit |
<a asp-action="Details" asp-route-id="#item.Id">Details</a> |
<a asp-action="Delete" asp-route-id="#item.Id">Delete</a>
</td>
</tr>
}
The Controller
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Edit([Bind("Id,Category")] BootstrapCategory bootstrapCategory)
{
_context.Update(bootstrapCategory);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
//return View(vMBPCategoris);
}
The view model class VMBPCategoris needs to have its members properties assigned to instances in a constructor:
public class VMBPCategoris
{
public List<BootstrapCategory> bootstrapCategories { get; set; }
public BootstrapCategory bootstrapCategory { get; set; }
public VMBPCategoris()
{
bootstrapCategories = new List<BootstrapCategory>();
bootstrapCategory = new BootstrapCategory();
}
}
You can give a name to your input tag.Change your form like below.
<form asp-action="Edit" method="post">
<input type="hidden" asp-for="#item.Id" name="Id"/>
<div class="#item.Id d-none">
<div class="input-group">
<input id="btnGroupEdit" type="submit" value="Save" class="input-group-text btn btn-primary" />
<input asp-for="#item.Category" name="Category" class="form-control" aria-label="Input group example" aria-describedby="btnGroupEdit">
</div>
<span asp-validation-for="#item.Category" class="text-danger"></span>
</div>
</form>
I made an easy solution by changing a little bit with the ViewModel and using the value attribute to get value from a model and using asp-for to set a value to another model.
It's all clarified in that Stackoverflow post
I have a form in which the user is supposed to enter Name and Wage and click a button Add. When the button "Add" is clicked, that user is supposed to be displayed on a list.
This is how I tried it.
Controller:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using TimeIsMoney.Models;
namespace TimeIsMoney.Controllers
{
public class HomeController : Controller
{
List<UserModel> users = new List<UserModel>();
public ActionResult Index(string returnUrl)
{
ViewBag.ReturnUrl = returnUrl;
return View();
}
public ActionResult AddUser(UserModel user)
{
users.Add(user);
return View(users);
}
}
}
View:
#model TimeIsMoney.Models.LoginModel
#{
}
#functions{
public string GetAntiForgeryToken()
{
string cookieToken, formToken;
AntiForgery.GetTokens(null, out cookieToken, out formToken);
return cookieToken + ":" + formToken;
}
}
<div id="main-content" class="col-md-8 col-md-offset-2">
<div class="col-md-12 row">
<h1>Time is money my friend!</h1>
</div>
<div class="col-md-12 row">
<h2>1000kr</h2>
</div>
<div class="col-md-12 row">
<button class="btn" onclick="start()">Start</button>
<button class="btn" onclick="reset()">Reset</button>
</div>
<div class="col-md-12 row">
<form >
<input type="text" placeholder="Name" />
<input type="number" placeholder="Hourly wage" />
<input type="submit" value="Add" onclick="AddUser()" />
</form>
</div>
<div class="col-md-12 row">
<div class="col-md-3 col-md-offset-1">
<label>Name:</label>
<ul>
<li>Dave</li>
<li>Pete</li>
</ul>
</div>
<div class="col-md-4">
<label>Wage:</label>
<ul>
<li>500kr/h</li>
<li>500kr/h</li>
</ul>
</div>
</div>
<br />
<br />
</div>
Model:
namespace TimeIsMoney.Models
{
public class UserModel
{
[Required]
[DataType(DataType.Text)]
[DisplayName("Username")]
public string UserName { get; set; }
[Required]
[DataType(DataType.Text)]
[DisplayName("Wage")]
public string Wage { get; set; }
}
}
Am I on the right path?
How can I move on from here?
UPDATE:
public ActionResult AddUser(UserModel user)
{
var list = Session["myUsers"] as List<UserModel>;
list.Add(user);
return View(list);
}
You're mostly on the right path excluding way you're trying to store your users list.
Since ASP.NET MVC controller instance is created for every request and disposed after view is rendered and passed to the browser - it will be new controller holding new List<UserModel> created on every request.
So you have to store it somewhere else (session variables, file on server's disk, database and so on). Usually database is best choice for this.
In the case you want to store it in session variable, you should add something like this into Global.asax:
protected void Session_Start(object sender, EventArgs e)
{
Session["myUsers"] = new List<UserModel>();
}
and then in your controller's methods you will be able to access this list as
var list = Session["myUsers"] as List<UserModel>;
I am having an issue where the default model binder is refusing to bind to my object, which is a List<> of simple objects.
The class:
public class ReferralHistoryDetail {
[Key]
public long Referral_Number { get; set; }
public Guid QuoteGuid { get; set; }
public byte ReferralTypeID { get; set; }
public string Referral_Type { get; set; }
public DateTime ReferralDateTime { get; set; }
public string ReferralComments { get; set; }
}
The controller definition:
[HttpPost]
public ActionResult Save(List<ReferralHistoryDetail> details) {
The view from Fiddler:
What am I doing wrong here?
This is shown via an EditorTemplate in the following manner:
#using (Html.BeginForm("Save", "Home")) {
#Html.AntiForgeryToken()
#Html.ValidationSummary(true)
<div class="tab-content">
<div class="tab-pane fade in active form-horizontal" id="basic">
#Html.EditorFor(m => m.ReferralHistoryDetail)
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
}
The value that is coming across as NULL is the one being passed to the POST method of the controller. The default model binder is not able to bind this.
I resolved this.
The problem is the Html.BeginForm() is in the main view, but it is only posting back stuff from the EditorFor()'s.
I had to change my controller to take in the main view's object and not the object that the EditorFor() is dealing with, because the Html.BeginForm() lives on the main view.
I'm currently working on an ASP.NET MVC 4 app. I'm pretty new to ASP.NET MVC. Right now, I have a form coded up like this:
<form role="form" method="post" action="/contact/new">
<div class="row">
<div class="col-xs-12">
<div class="form-group">
<label for="name">Name</label>
<div id="name">
<input class="form-control" type="text" autocomplete="off" />
</div>
</div>
<div class="form-group">
<label for="gender">Gender</label>
<select id="gender" class="form-control">
<option value="m">Male</option>
<option value="f">Female</option>
</select>
</div>
<div class="form-group">
<label for="email">Email Address</label>
<input class="form-control" type="email" autocomplete="off" />
</div>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
My controller and action look like the following:
public class ContactController : Controller
{
public ActionResult New()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult New()
{
return View();
}
}
My challenge is, I do not know what to put for the parameters of the HttpPost action in the controller. What should I put here?
Thanks!
MVC is based on Model View Controller. you should have a model for the View and your view should be strongly typed to its model.
If you don't want strongly typed view with some Model class, you have to read the form data from Request:
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult New(FormCollection form)
{
string Name = form["UserName"].ToString();
return View();
}
and add name attribute to your input elements:
<input class="form-control" type="text" name="UserName" autocomplete="off" />
you should see these few links for making understanding of strongly type view and form post:
Dyanmic VS Strong Typed Views
What is strongly typed View in asp.net mvc
Why we need Strongly typed View
First, you need to ensure that the /name/ attributes on your form controls are filled out.
Then, you should define a ViewModel class called NewContactViewModel and your ActionResult as such:
public class NewContactViewModel
{
public string name { get; set; }
public string gender { get; set; }
public string email { get; set; }
}
[HttpPost]
public ActionResult New(NewContactViewModel model)
{
}