How to bind a selected item in a drop-down list to a text box and edit it?

import { NgModule } from '@angular/core';

import { BrowserModule } from '@angular/platform-browser';

import { FormsModule } from '@angular/forms';

import { DropDownListModule} from '@syncfusion/ej2-ng-dropdowns';

import { AppComponent } from './app.component';

import { HelloComponent } from './hello.component';

@NgModule({

    imports:      [ BrowserModule, FormsModule ,DropDownListModule],

    declarations: [ AppComponent, HelloComponent ],

    bootstrap:    [ AppComponent ]

})

export class AppModule { }