There is no argument given that corresponds to the required formal parameter

Question

1.00/5 (1 vote)

See more:

It's like I'm trying to get my menu controller to show the menus I've added in the database to see if they should be displayed or not.

but if, for example, I just get content, then I will not get the content.

my Menu.cshtml file.

@page
@model NewWebsite_Site_2018.Pages.View.ViewBar_Info.MenuModel

@foreach (var item in Model.GetListMenu)
{
    <a>@item.Name</a>
}

Menu.cshtml.cs

C#

public List<ContentInfo> GetListMenu { get; set; }


        private readonly DBContext _dbContext;

        public MenuModel(DBContext context)
        {
            _dbContext = context;
        }
        

        public void OnGet()
        {
            GetListMenu = _dbContext.ContentInfo.Where(i => i.ShowMenu == true).OrderByDescending(i => i.Id).ToList();
        }

It's my menu model file that I need to use over to my _layout.cshtml file.

_Layout.cshtml here:

@{
    var menuModel = new NewWebsite_Site_2018.Pages.View.ViewBar_Info.MenuModel();
}

@Html.Partial("View/ViewBar_Info/Menu.cshtml", menuModel.GetListMenu)

Question is so how can I get my menu to appear?

Error: There is no argument given that corresponds to the required formal parameter 'context' of 'MenuModel.MenuModel(DBContext)'

What I have tried:

private MenuModel(DBContext context)
        {
            _dbContext = context;
        }

public MenuModel(DBContext context): base()
        {
            _dbContext = context;
        }

Posted 5-Dec-17 14:12pm

Jesper Petersen

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2017-12-08T09:34:00

The error is pretty obvious:

Your MenuModel class has a single constructor, which requires a DbContext parameter:

C#

public MenuModel(DBContext context)

You are trying to create an instance of that class by calling the constructor without passing any parameters:

var menuModel = new NewWebsite_Site_2018.Pages.View.ViewBar_Info.MenuModel();

The compiler can't find a constructor which doesn't take any parameters, and so it produces the compiler error from your question.

You either need to pass the parameter to the constructor:

var menuModel = new NewWebsite_Site_2018.Pages.View.ViewBar_Info.MenuModel(new DBContext());

or add a parameterless constructor to the class:

C#

public MenuModel() : this(new DBContext()) 
{
}