小编Hus*_*ain的帖子

在这里我为EName验证编写了一个小的验证属性,当我尝试2加载Html页面时,我将错误视为'ngClass',因为它不是'div'的已知属性.(

Component.ts

import { Component, OnInit } from "@angular/core"
import { Employee } from "../../../templates/employee/employee"
import { Validators, FormGroup, FormBuilder } from "@angular/forms"
@Component({
    selector: "customer-ui",
    templateUrl: "../../../templates/customer/customer.html"
})
export class JamComponent implements OnInit {
    EmpleoyeeForm: FormGroup;
    public constructor(private fb: FormBuilder) {}
    ngOnInit(): void {
        this.EmpleoyeeForm = this.fb.group({
            EmpName: ['', [Validators.required]]

        })
    }

Htmlcode

<form class="form-horizontal" novalidate [formGroup]="EmpleoyeeForm">

    <fieldset>
        <div class="form-group" [ngClass]="{'has-error': (EmpleoyeeForm.get('EmpName').touched ||
                                                  EmpleoyeeForm.get('EmpName').dirty) &&
                                                    !EmpleoyeeForm.get('EmpName').valid }">

            <label for="name">Name</label>
            <input type="text" class="form-control" formControlName="EmpName" [(ngModel)]="EmpName" />

        </div>
    </fieldset>
</form>

我是建筑师的新手.请解释为什么它给我以下错误:

"An error occurred when trying to create a controller of type 'HomeController'. Make sure that the controller has a parameterless public constructor.

这里我有1个接口(IRepo)1类文件(Repo)IRepo.cs

public interface IRepo
    {
        IEnumerable<Employee> GetEmployee();
        IQueryable<Employee> GetEmployee(int id);
    }

Repo.cs

Ctxdb _db = null;
        public Repo(Ctxdb db)
        {
            this._db = db;
        }

        public IEnumerable<Employee> GetEmployee()
        {
           //  
        }

HomeController.cs

IRepo _ObjRepo = null;

        public HomeController(Repo ObjRepo)
        {

            _ObjRepo = ObjRepo;
        }

        [Route("GetEmp")]
        [HttpGet]
        public IHttpActionResult GetDat()
        {
            var x = _ObjRepo.GetEmployee();
            if (x != null) …