Angular CRUD Using .Net Core Web API

This article will explain how to perform CRUD (Create, Read, Update and Delete) operations in Angular. We will see step-by-step instructions about CRUD operations in Angular.

Please refer to my previous article CURD Asp.Net Core 3.1 Web API using Entity Framework Core.

Before we start, let's understand the objective of this demonstration which tells what exactly will be covered in this article.

  • Create Angular App 
  • Adding Services
  • Adding Components
  • Adding Bootstrap
  • Register modules
  • Add Routing  
  • Navigating menus for routing
  • Adding component codes
  • Filtering & Sorting

So, let's get started.

Create Angular App

Open Command Prompt -> Navigate to the path where you want to create an angular app project using the below command.

ng new AngularCRUD

Create Angular App

Would you like to add Angular routing? - Y (Yes) 

routing

Which stylesheet format would you like to use? - CSS 

CSS

Angular Project install

Now, Once the project is created type code . + enter button to open the project in VS Code.

app in VS Code

Once the angular app is created we can check in the folder path.

Folder path

Now, open the terminal and run the project. 

ng serve -o

OR

ng serve --open

  Angular in Browser

Adding Service & Adding Components

Now, we need to add service and components to our angular app. Using the below command.

Add Department component

ng g c department

Now, add Department child components 

Add/ Edit Department component 

ng g c department/add-edit-department

Show Department

ng g c department/show-department

Now, same goes for Employee

Add Employee component

ng g c employee

Now, add Employee child components 

Add/ Edit Employee component 

ng g c employee/add-edit-employee

Show Employee

ng g c employee/show-employee

Now, add service which will comunicate with Web API

ng g s apiservice

Note

  • g - generate
  • c - component
  • s - service

Add Components and Service

Adding Bootstrap

Now go to https://getbootstrap.com/ and copy the bootstrap.min.css and bootstrap.bundle.min.js links.

Open index.html page and past .css link in head section and .js after body section.

Index.html page

Register modules

Now, open app.module.ts to register services and module. In app.module we can see all the components are been auto added. Now, we need to add service so we can use in our angular app. Also we need to add HTTP module and other modules which we will require.

  • In Providers add Apiservice
  • In Imports add HttpClientModule, FormsModule and ReactiveFormsModule

Register Modules

Add Routing

Now, Open app-routing.module.ts file and add Department and Employee in Routs

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { EmployeeComponent } from './employee/employee.component';
import { DepartmentComponent } from './department/department.component';

const routes: Routes = [
  { path: 'employee', component: EmployeeComponent },
  { path: 'department', component: DepartmentComponent }

];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

Navigating menus for routing

Now, Open app.component.html and add navigations.

<div class="container">
  <h3 class="d-flex justify-content-center">Angular 13 CRUD using .Net Core Web API </h3>
  <nav class="navbar navbar-expand-sm bg-light navbar-dark">
    <ul class="navbar-nav">
      <li class="nav-item">
        <button routerLink="department" class="m-1 btn btn-light btn-outline-primary" Button>Departments</button>
      </li>
      <li class="nav-item">
        <button routerLink="employee" class="m-1 btn btn-light btn-outline-primary" Button>Employees</button>
      </li>
    </ul>
  </nav>
  <router-outlet></router-outlet>
</div>

Adding service, component codes & Filtering & Sorting

Service

Now, Open apiservice.service.ts file and add code.

import { Injectable } from '@angular/core';
import { HttpClient, HttpEvent, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class ApiserviceService {
  readonly apiUrl = 'http://localhost:50306/api/';
  readonly photoUrl = "http://localhost:50306/Photos/";

  constructor(private http: HttpClient) { }

  // Department
  getDepartmentList(): Observable<any[]> {
    return this.http.get<any[]>(this.apiUrl + 'department/GetDepartment');
  }

  addDepartment(dept: any): Observable<any> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.post<any>(this.apiUrl + 'department/AddDepartment', dept, httpOptions);
  }

  updateDepartment(dept: any): Observable<any> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.put<any>(this.apiUrl + 'department/UpdateDepartment/', dept, httpOptions);
  }

  deleteDepartment(deptId: number): Observable<number> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.delete<number>(this.apiUrl + 'department/DeleteDepartment/' + deptId, httpOptions);
  }

  // Employee
  getEmployeeList(): Observable<any[]> {
    return this.http.get<any[]>(this.apiUrl + 'employee/GetEmployee');
  }

  addEmployee(emp: any): Observable<any> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.post<any>(this.apiUrl + 'employee/AddEmployee', emp, httpOptions);
  }

  updateEmployee(emp: any): Observable<any> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.put<any>(this.apiUrl + 'employee/UpdateEmployee/', emp, httpOptions);
  }

  deleteEmployee(empId: number): Observable<number> {
    const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };
    return this.http.delete<number>(this.apiUrl + 'employee/DeleteEmployee/' + empId, httpOptions);
  }

  uploadPhoto(photo: any) {
    return this.http.post(this.apiUrl + 'employee/savefile', photo);
  }

  getAllDepartmentNames(): Observable<any[]> {
    return this.http.get<any[]>(this.apiUrl + 'employee/GetAllDepartmentNames');
  }

}

Components
 

Department Components

Now, Open the department.component.html and add app-show-department selector 

<app-show-department></app-show-department>

Now, Open the show-department.component.html and add code.

Note

<button type="button" class="btn btn-primary m-2 float-end" data-bs-toggle="modal" data-bs-target="#exampleModal"
  (click)="addClick()">
  Add Department
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel"
  aria-hidden="true">
  <div class="modal-dialog modal-dialog-centered modal-xl" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">{{ModalTitle}}</h5>
        <button type="button" class="close" data-bs-dismiss="modal" aria-label="Close" (click)="closeClick()">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <app-add-edit-department [depart]="depart" *ngIf="ActivateAddEditDepartComp">
        </app-add-edit-department>
      </div>
    </div>
  </div>
</div>

<table class="table table-striped">
  <thead>
    <tr>
      <th>
        <div class="d-flex flex-row">
          <input class="form-control m-2" [(ngModel)]="DepartmentIdFilter" (keyup)="FilterFn()" placeholder="Filter">
          <button type="button" class="btn btn-light" (click)="sortResult('DepartmentId',true)">
            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
              class="bi bi-arrow-down-square-fill" viewBox="0 0 16 16">
              <path
                d="M2 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2H2zm6.5 4.5v5.793l2.146-2.147a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 1 1 .708-.708L7.5 10.293V4.5a.5.5 0 0 1 1 0z" />
            </svg>
          </button>

          <button type="button" class="btn btn-light" (click)="sortResult('DepartmentId',false)">
            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
              class="bi bi-arrow-up-square-fill" viewBox="0 0 16 16">
              <path
                d="M2 16a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2zm6.5-4.5V5.707l2.146 2.147a.5.5 0 0 0 .708-.708l-3-3a.5.5 0 0 0-.708 0l-3 3a.5.5 0 1 0 .708.708L7.5 5.707V11.5a.5.5 0 0 0 1 0z" />
            </svg>
          </button>
        </div>
        Department Id
      </th>
      <th>
        <div class="d-flex flex-row">
          <input class="form-control m-2" [(ngModel)]="DepartmentNameFilter" (keyup)="FilterFn()" placeholder="Filter">
          <button type="button" class="btn btn-light" (click)="sortResult('DepartmentName',true)">
            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
              class="bi bi-arrow-down-square-fill" viewBox="0 0 16 16">
              <path
                d="M2 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2H2zm6.5 4.5v5.793l2.146-2.147a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 1 1 .708-.708L7.5 10.293V4.5a.5.5 0 0 1 1 0z" />
            </svg>
          </button>

          <button type="button" class="btn btn-light" (click)="sortResult('DepartmentName',false)">
            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
              class="bi bi-arrow-up-square-fill" viewBox="0 0 16 16">
              <path
                d="M2 16a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2zm6.5-4.5V5.707l2.146 2.147a.5.5 0 0 0 .708-.708l-3-3a.5.5 0 0 0-.708 0l-3 3a.5.5 0 1 0 .708.708L7.5 5.707V11.5a.5.5 0 0 0 1 0z" />
            </svg>
          </button>
        </div>
        Department Name
      </th>
      <th>Options</th>
    </tr>
  </thead>
  <tbody>
    <tr *ngFor="let dataItem of DepartmentList">
      <td>{{dataItem.DepartmentId}}</td>
      <td>{{dataItem.DepartmentName}}</td>
      <td>
        <button type="button" class="btn btn-light mr-1" data-bs-toggle="modal" data-bs-target="#exampleModal"
          (click)="editClick(dataItem)" data-backdrop="static" data-keyboard="false">
          <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-pencil-square" fill="currentColor"
            xmlns="http://www.w3.org/2000/svg">
            <path
              d="M15.502 1.94a.5.5 0 0 1 0 .706L14.459 3.69l-2-2L13.502.646a.5.5 0 0 1 .707 0l1.293 1.293zm-1.75 2.456l-2-2L4.939 9.21a.5.5 0 0 0-.121.196l-.805 2.414a.25.25 0 0 0 .316.316l2.414-.805a.5.5 0 0 0 .196-.12l6.813-6.814z" />
            <path fill-rule="evenodd"
              d="M1 13.5A1.5 1.5 0 0 0 2.5 15h11a1.5 1.5 0 0 0 1.5-1.5v-6a.5.5 0 0 0-1 0v6a.5.5 0 0 1-.5.5h-11a.5.5 0 0 1-.5-.5v-11a.5.5 0 0 1 .5-.5H9a.5.5 0 0 0 0-1H2.5A1.5 1.5 0 0 0 1 2.5v11z" />
          </svg>
        </button>
        <button type="button" class="btn btn-light mr-1" (click)="deleteClick(dataItem)">
          <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-trash-fill" fill="currentColor"
            xmlns="http://www.w3.org/2000/svg">
            <path fill-rule="evenodd"
              d="M2.5 1a1 1 0 0 0-1 1v1a1 1 0 0 0 1 1H3v9a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V4h.5a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1H10a1 1 0 0 0-1-1H7a1 1 0 0 0-1 1H2.5zm3 4a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7a.5.5 0 0 1 .5-.5zM8 5a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7A.5.5 0 0 1 8 5zm3 .5a.5.5 0 0 0-1 0v7a.5.5 0 0 0 1 0v-7z" />
          </svg>
        </button>
      </td>
    </tr>
  </tbody>
</table>

Now, Open the show-department.component.ts file and add code.

import { Component, OnInit } from '@angular/core';
import { ApiserviceService } from 'src/app/apiservice.service';

@Component({
  selector: 'app-show-department',
  templateUrl: './show-department.component.html',
  styleUrls: ['./show-department.component.css']
})
export class ShowDepartmentComponent implements OnInit {

  constructor(private service: ApiserviceService) { }

  DepartmentList: any = [];
  ModalTitle = "";
  ActivateAddEditDepartComp: boolean = false;
  depart: any;

  DepartmentIdFilter = "";
  DepartmentNameFilter = "";
  DepartmentListWithoutFilter: any = [];

  ngOnInit(): void {
    this.refreshDepList();
  }

  addClick() {
    this.depart = {
      DepartmentId: "0",
      DepartmentName: ""
    }
    this.ModalTitle = "Add Department";
    this.ActivateAddEditDepartComp = true;
  }

  editClick(item: any) {
    this.depart = item;
    this.ModalTitle = "Edit Department";
    this.ActivateAddEditDepartComp = true;
  }

  deleteClick(item: any) {
    if (confirm('Are you sure??')) {
      this.service.deleteDepartment(item.DepartmentId).subscribe(data => {
        alert(data.toString());
        this.refreshDepList();
      })
    }
  }

  closeClick() {
    this.ActivateAddEditDepartComp = false;
    this.refreshDepList();
  }


  refreshDepList() {
    this.service.getDepartmentList().subscribe(data => {
      this.DepartmentList = data;
      this.DepartmentListWithoutFilter = data;
    });
  }

  sortResult(prop: any, asc: any) {
    this.DepartmentList = this.DepartmentListWithoutFilter.sort(function (a: any, b: any) {
      if (asc) {
        return (a[prop] > b[prop]) ? 1 : ((a[prop] < b[prop]) ? -1 : 0);
      }
      else {
        return (b[prop] > a[prop]) ? 1 : ((b[prop] < a[prop]) ? -1 : 0);
      }
    });
  }

  FilterFn() {
    var DepartmentIdFilter = this.DepartmentIdFilter;
    var DepartmentNameFilter = this.DepartmentNameFilter;

    this.DepartmentList = this.DepartmentListWithoutFilter.filter(
      function (el: any) {
        return el.DepartmentId.toString().toLowerCase().includes(
          DepartmentIdFilter.toString().trim().toLowerCase()
        ) &&
          el.DepartmentName.toString().toLowerCase().includes(
            DepartmentNameFilter.toString().trim().toLowerCase())
      }
    );
  }
}

Now, Open the add-edit-department.component.html and add code.

<div class="d-flex flex-row bd-highlight mb-9">
  <div class="p-2 w-100 bd-highlight">

    <div class="input-group mb-12">
      <span class="input-group-text">Department Name</span>
      <input type="text" class="form-control" [(ngModel)]="DepartmentName">
    </div>
  </div>
</div>
<button (click)="addDepartment()" *ngIf="depart.DepartmentId == '0'" class="btn btn-primary">
  Add
</button>

<button (click)="updateDepartment()" *ngIf="depart.DepartmentId !='0'" class="btn btn-primary">
  Update
</button>

Now, Open the add-edit-department.component.ts and add code.

import { Component, OnInit, Input } from '@angular/core';
import { ApiserviceService } from 'src/app/apiservice.service';

@Component({
  selector: 'app-add-edit-department',
  templateUrl: './add-edit-department.component.html',
  styleUrls: ['./add-edit-department.component.css']
})
export class AddEditDepartmentComponent implements OnInit {

  constructor(private service: ApiserviceService) { }

  @Input() depart: any;
  DepartmentId = "";
  DepartmentName = "";

  ngOnInit(): void {

    this.DepartmentId = this.depart.DepartmentId;
    this.DepartmentName = this.depart.DepartmentName;
  }

  addDepartment() {
    var dept = {
      DepartmentId: this.DepartmentId,
      DepartmentName: this.DepartmentName
    };
    this.service.addDepartment(dept).subscribe(res => {
      alert(res.toString());
    });
  }

  updateDepartment() {
    var dept = {
      DepartmentId: this.DepartmentId,
      DepartmentName: this.DepartmentName
    };
    this.service.updateDepartment(dept).subscribe(res => {
      alert(res.toString());
    });
  }
}

Employee Components

Now, Open the employee.component.html and add app-show-employee selector 

<app-show-employee></app-show-employee>

Now, Open the show-employee.component.html and add code.

<button type="button" class="btn btn-primary m-2 float-end" data-bs-toggle="modal" data-bs-target="#exampleModal"
  (click)="addClick()">
  Add Employee
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel"
  aria-hidden="true">
  <div class="modal-dialog modal-dialog-centered modal-xl" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">{{ModalTitle}}</h5>
        <button type="button" class="close" data-bs-dismiss="modal" aria-label="Close" (click)="closeClick()">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <app-add-edit-employee [emp]="emp" *ngIf="ActivateAddEditEmpComp">
        </app-add-edit-employee>
      </div>
    </div>
  </div>
</div>

<table class="table table-striped">
  <thead>
    <tr>
      <th>Employee Id</th>
      <th>Employee Name</th>
      <th>Department</th>
      <th>Date Of Joining</th>
      <th>Options</th>
    </tr>
  </thead>
  <tbody>
    <tr *ngFor="let dataItem of EmployeeList">
      <td>{{dataItem.EmployeeId}}</td>
      <td>{{dataItem.EmployeeName}}</td>
      <td>{{dataItem.Department}}</td>
      <td>{{dataItem.DateOfJoining}}</td>
      <td>
        <button type="button" class="btn btn-light mr-1" data-bs-toggle="modal" data-bs-target="#exampleModal"
          (click)="editClick(dataItem)" data-backdrop="static" data-keyboard="false">
          <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-pencil-square" fill="currentColor"
            xmlns="http://www.w3.org/2000/svg">
            <path
              d="M15.502 1.94a.5.5 0 0 1 0 .706L14.459 3.69l-2-2L13.502.646a.5.5 0 0 1 .707 0l1.293 1.293zm-1.75 2.456l-2-2L4.939 9.21a.5.5 0 0 0-.121.196l-.805 2.414a.25.25 0 0 0 .316.316l2.414-.805a.5.5 0 0 0 .196-.12l6.813-6.814z" />
            <path fill-rule="evenodd"
              d="M1 13.5A1.5 1.5 0 0 0 2.5 15h11a1.5 1.5 0 0 0 1.5-1.5v-6a.5.5 0 0 0-1 0v6a.5.5 0 0 1-.5.5h-11a.5.5 0 0 1-.5-.5v-11a.5.5 0 0 1 .5-.5H9a.5.5 0 0 0 0-1H2.5A1.5 1.5 0 0 0 1 2.5v11z" />
          </svg>
        </button>
        <button type="button" class="btn btn-light mr-1" (click)="deleteClick(dataItem)">
          <svg width="1em" height="1em" viewBox="0 0 16 16" class="bi bi-trash-fill" fill="currentColor"
            xmlns="http://www.w3.org/2000/svg">
            <path fill-rule="evenodd"
              d="M2.5 1a1 1 0 0 0-1 1v1a1 1 0 0 0 1 1H3v9a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V4h.5a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1H10a1 1 0 0 0-1-1H7a1 1 0 0 0-1 1H2.5zm3 4a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7a.5.5 0 0 1 .5-.5zM8 5a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7A.5.5 0 0 1 8 5zm3 .5a.5.5 0 0 0-1 0v7a.5.5 0 0 0 1 0v-7z" />
          </svg>
        </button>
      </td>
    </tr>
  </tbody>
</table>

Now, Open the show-employee.component.ts and add code.

import { Component, OnInit } from '@angular/core';
import { ApiserviceService } from 'src/app/apiservice.service';

@Component({
  selector: 'app-show-employee',
  templateUrl: './show-employee.component.html',
  styleUrls: ['./show-employee.component.css']
})
export class ShowEmployeeComponent implements OnInit {

  constructor(private service: ApiserviceService) { }

  EmployeeList: any = [];
  ModalTitle = "";
  ActivateAddEditEmpComp: boolean = false;
  emp: any;

  ngOnInit(): void {
    this.refreshEmpList();
  }

  addClick() {
    this.emp = {
      EmployeeId: "0",
      EmployeeName: "",
      Department: "",
      DateOfJoining: "",
      PhotoFileName: "anonymous.png"
    }
    this.ModalTitle = "Add Employee";
    this.ActivateAddEditEmpComp = true;
  }

  editClick(item: any) {
    this.emp = item;
    this.ModalTitle = "Edit Employee";
    this.ActivateAddEditEmpComp = true;
  }

  deleteClick(item: any) {
    if (confirm('Are you sure??')) {
      this.service.deleteEmployee(item.EmployeeId).subscribe(data => {
        alert(data.toString());
        this.refreshEmpList();
      })
    }
  }

  closeClick() {
    this.ActivateAddEditEmpComp = false;
    this.refreshEmpList();
  }

  refreshEmpList() {
    this.service.getEmployeeList().subscribe(data => {
      this.EmployeeList = data;
    });
  }
}

Now, Open the add-edit-employee.component.html and add code.

Note: I have added Photo upload code. 

<div class="d-flex flex-row bd-highlight mb-3">
  <div class="p-2 w-50 bd-highlight">
    <div class="input-group mb-3">
      <span class="input-group-text">Name</span>
      <input type="text" class="form-control" [(ngModel)]="EmployeeName">
    </div>
    <div class="input-group mb-3">
      <span class="input-group-text">Department</span>
      <select class="form-select" [(ngModel)]="Department">
        <option>--Select--</option>
        <option *ngFor="let dep of DepartmentList">
          {{dep.DepartmentName}}
        </option>
      </select>
    </div>
    <div class="input-group mb-3">
      <span class="input-group-text">DOJ</span>
      <input type="date" class="form-control" [(ngModel)]="DateOfJoining">
    </div>
  </div>
  <div class="p-2 w-50 bd-highlight">
    <img width="250px" height="250px" [src]="PhotoFilePath" />
    <input class="m-2" type="file" (change)="uploadPhoto($event)">
  </div>
</div>
<button type="button" (click)="addEmployee()" *ngIf="emp.EmployeeId=='0'" class="btn btn-primary">
  Create
</button>

<button type="button" (click)="updateEmployee()" *ngIf="emp.EmployeeId!='0'" class="btn btn-primary">
  Update
</button>

Now, Open the add-edit-employee.component.ts and add code.

import { Component, Input, OnInit } from '@angular/core';
import { ApiserviceService } from 'src/app/apiservice.service';

@Component({
  selector: 'app-add-edit-employee',
  templateUrl: './add-edit-employee.component.html',
  styleUrls: ['./add-edit-employee.component.css']
})
export class AddEditEmployeeComponent implements OnInit {

  constructor(private service: ApiserviceService) { }
  @Input() emp: any;
  EmployeeId = "";
  EmployeeName = "";
  Department = "";
  DateOfJoining = "";
  PhotoFileName = "";
  PhotoFilePath = "";
  DepartmentList: any = [];


  ngOnInit(): void {
    this.loadEmployeeList();
  }

  loadEmployeeList() {

    this.service.getAllDepartmentNames().subscribe((data: any) => {
      this.DepartmentList = data;

      this.EmployeeId = this.emp.EmployeeId;
      this.EmployeeName = this.emp.EmployeeName;
      this.Department = this.emp.Department;
      this.DateOfJoining = this.emp.DateOfJoining;
      this.PhotoFileName = this.emp.PhotoFileName;
      this.PhotoFilePath = this.service.photoUrl + this.PhotoFileName;
    });
  }

  addEmployee() {
    var val = {
      EmployeeId: this.EmployeeId,
      EmployeeName: this.EmployeeName,
      Department: this.Department,
      DateOfJoining: this.DateOfJoining,
      PhotoFileName: this.PhotoFileName
    };

    this.service.addEmployee(val).subscribe(res => {
      alert(res.toString());
    });
  }

  updateEmployee() {
    var val = {
      EmployeeId: this.EmployeeId,
      EmployeeName: this.EmployeeName,
      Department: this.Department,
      DateOfJoining: this.DateOfJoining,
      PhotoFileName: this.PhotoFileName
    };

    this.service.updateEmployee(val).subscribe(res => {
      alert(res.toString());
    });
  }


  uploadPhoto(event: any) {
    var file = event.target.files[0];
    const formData: FormData = new FormData();
    formData.append('file', file, file.name);

    this.service.uploadPhoto(formData).subscribe((data: any) => {
      this.PhotoFileName = data.toString();
      this.PhotoFilePath = this.service.photoUrl + this.PhotoFileName;
    })
  }
}

Now Run the Project using ng serve -o OR ng serve --open

Department

Department

Add Department

Add Department

Edit Department

Edit Department

Delete Department

Delete Department

Employee

Employee

Add Employee

Employee Add Page

Employee Add to DB

Edit Employee

Employee Edit

Delete Employee

Employee Delete

Filtering & Sorting 

Filtering & Sorting

I have added the full code as an attachment.