In this article, we will learn how to perform an Angular 8 crud operation example using web API
create a root directory(customer ) in your project, you will implement web pis for curd and Add the given below code
app-routing.module.ts
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import {CustomerCrudComponent} from '../app/customer-crud/customer-crud.component'
const routes: Routes = [
{path:"crud",component:CustomerCrudComponent}
];
@NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClient,HttpClientModule, HttpHeaders } from '@angular/common/http';
import { CommonModule } from '@angular/common';
import { ToastrModule } from 'ngx-toastr';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import {A11yModule} from '@angular/cdk/a11y';
import {DragDropModule} from '@angular/cdk/drag-drop';
import {PortalModule} from '@angular/cdk/portal';
import {ScrollingModule} from '@angular/cdk/scrolling';
import {CdkStepperModule} from '@angular/cdk/stepper';
import {CdkTableModule} from '@angular/cdk/table';
import {CdkTreeModule} from '@angular/cdk/tree';
import {
MatAutocompleteModule,
MatBadgeModule,
MatBottomSheetModule,
MatButtonModule,
MatButtonToggleModule,
MatCardModule,
MatCheckboxModule,
MatChipsModule,
MatDatepickerModule,
MatDialogModule,
MatDividerModule,
MatExpansionModule,
MatGridListModule,
MatIconModule,
MatInputModule,
MatListModule,
MatMenuModule,
MatNativeDateModule,
MatPaginatorModule,
MatProgressBarModule,
MatProgressSpinnerModule,
MatRadioModule,
MatRippleModule,
MatSelectModule,
MatSidenavModule,
MatSliderModule,
MatSlideToggleModule,
MatSnackBarModule,
MatSortModule,
MatStepperModule,
MatTableModule,
MatTabsModule,
MatToolbarModule,
MatTooltipModule,
MatTreeModule,
} from '@angular/material';
import { CustomerCrudComponent } from './customer-crud/customer-crud.component';
import { CustomerService } from './customer.service';
@NgModule({
declarations: [
AppComponent,
CustomerCrudComponent,
],
imports: [
BrowserModule,
BrowserAnimationsModule,CommonModule,ToastrModule.forRoot(),
FormsModule,ReactiveFormsModule,
AppRoutingModule,
HttpClientModule,
A11yModule,
CdkStepperModule,
CdkTableModule,
CdkTreeModule,
DragDropModule,
MatAutocompleteModule,
MatBadgeModule,
MatBottomSheetModule,
MatButtonModule,
MatButtonToggleModule,
MatCardModule,
MatCheckboxModule,
MatChipsModule,
MatStepperModule,
MatDatepickerModule,
MatDialogModule,
MatDividerModule,
MatExpansionModule,
MatGridListModule,
MatIconModule,
MatInputModule,
MatListModule,
MatMenuModule,
MatNativeDateModule,
MatPaginatorModule,
MatProgressBarModule,
MatProgressSpinnerModule,
MatRadioModule,
MatRippleModule,
MatSelectModule,
MatSidenavModule,
MatSliderModule,
MatSlideToggleModule,
MatSnackBarModule,
MatSortModule,
MatTableModule,
MatTabsModule,
MatToolbarModule,
MatTooltipModule,
MatTreeModule,
PortalModule,
ScrollingModule,
],
providers: [CustomerService],
bootstrap: [AppComponent]
})
export class AppModule { }
Customer.Model.ts
export interface Customer
{
Id:number;
Name:string;
Phone:string;
Email:string;
Notes:number;
Gender:string;
}
customer.service.ts
import { Injectable } from '@angular/core';
import { HttpClient,HttpClientModule, HttpHeaders } from '@angular/common/http';
import { Observable, of, throwError, pipe} from "rxjs"
import { map, filter, catchError, mergeMap } from 'rxjs/operators';
import { Customer } from '../app/models/Customer.Model'
@Injectable({
providedIn: 'root'
})
export class CustomerService {
public apiURL:string="http://localhost:89506/api/customers";
constructor(private httpClient:HttpClient) { }
// Create =C
insertCustomer(inputCustomer:Customer)
{
return this.httpClient.post(this.apiURL,inputCustomer)
.pipe(
map(res => res),
catchError( this.errorHandler)
);
}
// Read=R
getAllCustomers ()
{
return this.httpClient.get(this.apiURL)
.pipe(
map(res => res),
catchError( this.errorHandler)
);
}
// Update=U
updateCustomer(inputCustomer:Customer,id:number)
{
return this.httpClient.put(this.apiURL+"/"+id,inputCustomer)
.pipe(
map(res => res),
catchError( this.errorHandler)
);
}
// Delete =D
deleteCustomer(id:number)
{
return this.httpClient.delete(this.apiURL+"/"+id)
.pipe(
map(res => res),
catchError( this.errorHandler)
);
}
errorHandler(error: Response) {
console.log(error);
return throwError(error);
}
}
the above customer.service.ts file you will change your API URL
customer.service.spec.ts
import { TestBed } from '@angular/core/testing';
import { CustomerService } from './customer.service';
describe('CustomerService', () => {
beforeEach(() => TestBed.configureTestingModule({}));
it('should be created', () => {
const service: CustomerService = TestBed.get(CustomerService);
expect(service).toBeTruthy();
});
});
customer-crud.component.spec.ts
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { CustomerCrudComponent } from './customer-crud.component';
describe('CustomerCrudComponent', () => {
let component: CustomerCrudComponent;
let fixture: ComponentFixture<CustomerCrudComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ CustomerCrudComponent ]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(CustomerCrudComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
customer-crud.component.ts
import { Component, OnInit, Input,ChangeDetectionStrategy } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { SelectionModel } from '@angular/cdk/collections';
import { MatTableDataSource } from '@angular/material/table';
import { ToastrService } from 'ngx-toastr';
import { IAlert } from '../models/IAlert'
import { CustomerService } from '../customer.service';
import { Customer } from '../models/Customer.Model';
//This is crud tutorial designed by DotNet Techy YouTube Channel
@Component({
selector: 'app-customer-crud',
templateUrl: './customer-crud.component.html',
styleUrls: ['./customer-crud.component.scss'],
changeDetection:ChangeDetectionStrategy.Default
})
export class CustomerCrudComponent implements OnInit {
displayedColumns: string[] = ['Id', 'Name', 'Phone', 'Email', 'Notes', 'Gender'];
public ELEMENT_DATA: Customer[];
selection = new SelectionModel<Customer>(false, []);
insertCustomerForm: FormGroup;
updateCustomerForm: FormGroup;
deleteCustomerForm: FormGroup;
@Input()
public alerts: Array<IAlert> = [];
public globalResponse: any;
public customers: Customer[];
public currentRow: Customer[];
dataSource = new MatTableDataSource<Customer>(this.customers);
gen = "";
selectedValue="";
selectedValueUpdate="";
selectedValueDelete="";
gender = [
{ key: 1, value: 'Male' },
{ key: 2, value: 'Female' },
];
/** Whether the number of selected elements matches the total number of rows. */
isAllSelected() {
const numSelected = this.selection.selected.length;
const numRows = this.dataSource.data.length;
return numSelected === numRows;
}
/** Selects all rows if they are not all selected; otherwise clear selection. */
masterToggle() {
this.isAllSelected() ?
this.selection.clear() :
this.dataSource.data.forEach(row => this.selection.select(row));
}
/** The label for the checkbox on the passed row */
checkboxLabel(row?: Customer): string {
this.currentRow = this.selection.selected;
console.log(this.currentRow.length);
if (!row) {
return `${this.isAllSelected() ? 'select' : 'deselect'} all`;
}
if (this.currentRow.length > 0) {
//Set Update form
this.updateCustomerForm.controls["Id"].setValue(this.currentRow[0].Id);
this.updateCustomerForm.controls["Name"].setValue(this.currentRow[0].Name);
this.updateCustomerForm.controls["Phone"].setValue(this.currentRow[0].Phone);
this.updateCustomerForm.controls["Email"].setValue(this.currentRow[0].Email);
this.updateCustomerForm.controls["Notes"].setValue(this.currentRow[0].Notes);
this.selectedValueUpdate=this.currentRow[0].Gender;
this.updateCustomerForm.controls["Gender"].setValue(this.selectedValueUpdate);
//Set delete form
this.deleteCustomerForm.controls["Id"].setValue(this.currentRow[0].Id);
this.deleteCustomerForm.controls["Name"].setValue(this.currentRow[0].Name);
this.deleteCustomerForm.controls["Phone"].setValue(this.currentRow[0].Phone);
this.deleteCustomerForm.controls["Email"].setValue(this.currentRow[0].Email);
this.deleteCustomerForm.controls["Notes"].setValue(this.currentRow[0].Notes);
this.selectedValueDelete=this.currentRow[0].Gender;
this.deleteCustomerForm.controls["Gender"].setValue(this.selectedValueDelete);
}
return `${this.selection.isSelected(row) ? 'deselect' : 'select'} row ${row.Id + 1}`;
}
constructor(private fb: FormBuilder, private customerService: CustomerService, private toastrService: ToastrService) {
}
ngOnInit() {
this.OnRefreshCustomer();
this.insertCustomerForm = this.fb.group({
Name: ['', Validators.required],
Email: ['', Validators.required],
Phone: ['', Validators.required],
Notes: ['',],
Gender: ['', Validators.required],
});
this.updateCustomerForm = this.fb.group({
Id: ['', Validators.required],
Name: ['', Validators.required],
Email: ['', Validators.required],
Phone: ['', Validators.required],
Notes: ['',],
Gender: ['', Validators.required],
});
this.deleteCustomerForm = this.fb.group({
Id: ['', Validators.required],
Name: ['', Validators.required],
Email: ['', Validators.required],
Phone: ['', Validators.required],
Notes: ['',],
Gender: ['', Validators.required],
});
}
// C-For Create
OnSaveCustomer() {
let inputCustomer = this.insertCustomerForm.value;
console.log("Below is input customer.");
inputCustomer.Gender = this.selectedValue;
console.log(inputCustomer);
this.customerService.insertCustomer(inputCustomer)
.subscribe((result) => {
this.globalResponse = result;
},
error => { //This is error part
console.log(error.message);
this.toastrService.error('error', 'Something went wrong while saving the product, Please try after sometime.');
},
() => {
// This is Success part
this.toastrService.success('success', 'Customer has been saved successfully. Now you can add more customer , if you wish too.');
this.insertCustomerForm.reset();
}
)
}
// R-For Read
OnRefreshCustomer() {
this.customerService.getAllCustomers()
.subscribe((result) => {
this.globalResponse = result;
},
error => { //This is error part
console.log(error.message);
this.toastrService.error('error', 'Something went wrong while getting the customers, Please try after sometime.');
},
() => {
// This is Success part
this.toastrService.success('success', 'Customer data loaded successfully.');
this.customers = this.globalResponse;
this.dataSource = new MatTableDataSource<Customer>(this.customers);
console.log("All records");
console.log(this.customers);
this.insertCustomerForm.reset();
this.updateCustomerForm.reset();
this.deleteCustomerForm.reset();
}
)
}
// U-For Update
OnUpdateCustomer() {
let inputCustomer = this.updateCustomerForm.value;
console.log(inputCustomer);
inputCustomer.Gender = this.selectedValueDelete;
this.customerService.updateCustomer(inputCustomer, inputCustomer.Id)
.subscribe((result) => {
this.globalResponse = result;
},
error => { //This is error part
console.log(error.message);
this.toastrService.error('error', 'Something went wrong while getting the customers, Please try after sometime.');
},
() => {
// This is Success part
this.toastrService.success('success', 'Customer has been updated successfully. Now you can update more customer , if you wish too.');
this.updateCustomerForm.reset();
this.deleteCustomerForm.reset();
}
)
}
// D-For Delete
OnDeleteCustomer() {
let inputCustomer = this.deleteCustomerForm.value;
console.log(inputCustomer);
this.customerService.deleteCustomer(inputCustomer.Id)
.subscribe((result) => {
this.globalResponse = result;
},
error => { //This is error part
console.log(error.message);
this.toastrService.error('error', 'Something went wrong while getting the customers, Please try after sometime.');
},
() => {
// This is Success part
this.toastrService.success('success', 'Customer has been deleted successfully. Now you can delete more customer , if you wish too.');
this.updateCustomerForm.reset();
this.deleteCustomerForm.reset();
}
)
}
}
customer-curd-component.html
<!DOCTYPE>
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<span>CRUD Operation In Angular 8, Tutorial By tutorial helper</span>
Create Customer Form
<div>
<form target="_blank" onsubmit="try {return window.confirm("This form may not function properly due to certain security constraints.\nContinue?");} catch (e) {return false;}">
<input>
<input>
<input>
<textarea></textarea>
{{gen.value}}
</form>
</div>
<button color="primary" style="margin-left:45%">Save</button>
<table>
<th>
<button color="warn">Refresh</button>
</th>
<td></td>
<th> Name. </th>
<td> {{element.Name}} </td>
<th> Phone </th>
<td> {{element.Phone}} </td>
<th> Email </th>
<td> {{element.Email}} </td>
<th> Notes </th>
<td> {{element.Notes}} </td>
<th> Gender </th>
<td> {{element.Gender}} </td>
<tr></tr>
<tr></tr>
</table>
Update Customer
<div>
<form target="_blank" onsubmit="try {return window.confirm("This form may not function properly due to certain security constraints.\nContinue?");} catch (e) {return false;}" >
<input>
<input>
<input>
<input>
<textarea></textarea>
{{gen.value}}
</form>
</div>
<button color="accent" style="margin-left:45%">Update</button>
Delete Customer
<div>
<form target="_blank" onsubmit="try {return window.confirm("This form may not function properly due to certain security constraints.\nContinue?");} catch (e) {return false;}" >
<input>
<input>
<input>
<input>
<textarea></textarea>
{{gen.value}}
</form>
</div>
<button color="primary" style="margin-left:45%">Delete</button>
</body>
</html>
run your application
hello ! my name is Duttaluru Vijay.i am working in Microsoft .net technologies since 2016.
I like to share my work experience, research, and knowledge through my blog.
I love developing the applications in Microsoft technologies including asp.net mvc,c#.net, windfarms, SQL server,entityfrawork,Ajax,Jquery,WEbApi,Asp.net core, SEO, WordPress, UI..more
I like to share my work experience, research, and knowledge through my blog.
I love developing the applications in Microsoft technologies including asp.net mvc,c#.net, windfarms, SQL server,entityfrawork,Ajax,Jquery,WEbApi,Asp.net core, SEO, WordPress, UI..more
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