Select - Dropdown -option
-------------------------
<div id="selectDiv">
<select id="dropdown" (change)="getdays()">
<option *ngFor='let data of day_list'>{{data.days}}</option>
</select>
componet.ts
------------
getdays(e) {
var inputValue: any = (<HTMLInputElement>document.getElementById('dropdown'));
let index = inputValue.selectedIndex;
this.alertService.getAlertData(this.day_list[index].id, this.url).subscribe(
(data: any) => {
if (data.success) {
}
}
Checkbox - selected list to show
---------------------------------
input type="checkbox" [(checked)]="Checkvalue.Regular" id="Regular" name="Regular" (change)="onclickcheckbox($event)">
<tr *ngFor="let rowdata of AsupTableRows | filter:{ option:filtered}>
componet.ts
-----------
public Checkvalue:Object={
"Regular":true,
"Others":true
};
onclickcheckbox(event?:any){
if(event){
var obj={
[event.target.name] : event.target.checked
}
this.Checkvalue=Object.assign({},this.Checkvalue,obj)
}
var keys = Object.keys(this.Checkvalue);
this.filtered = keys.filter((key) => {
return this.Checkvalue[key]
});
}
Radio buttton:
--------------
radio.json or entries array
---------------------------
[
{
id: 1,
description: 'entry 1'
},
{
id: 2,
description: 'entry 2'
},
...
]
---
<tbody>
<tr *ngFor="let entry of entries">
<td>{{ entry.description }}</td>
<td>
<input type="radio" name="radiogroup">
</td>
</tr>
</tbody>
export class App {
entries = []
}
Case1: Pre-select the 1st radio button of the list ==>
<tr *ngFor="let entry of entries; let idx = index">
<td>{{ entry.description }}</td>
<td>
<input type="radio" name="radiogroup" [checked]="idx === 0">
</td>
</tr>
Case2: Binding: Model -> Template ==>
<tr *ngFor="let entry of entries">
<td>{{ entry.description }}</td>
<td>
<input type="radio" name="radiogroup"
[checked]="idx === 0"
[value]="entry.id">
</td>
</tr>
Case3: Binding: Template -> Model ==>
<tr *ngFor="let entry of entries">
<td>{{ entry.description }}</td>
<td>
<input type="radio" name="radiogroup"
[checked]="idx === 0"
[value]="entry.id"
(change)="onSelectionChange(entry)">
</td>
</tr>
@Component({...})
class App {
entries = [];
selectedEntry;
onSelectionChange(entry) {
this.selectedEntry = entry;
}
}
Radio Button Full code:
------------------------
import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
@Component({
selector: 'my-app',
template: `
<div>
<h2>Binding radio buttons</h2>
<p>Binding radio button lists</p>
<table>
<thead>
<td>Description</td>
<td></td>
</thead>
<tbody>
<tr *ngFor="let entry of entries; let idx = index">
<td>{{ entry.description }}</td>
<td><input type="radio" name="certificategroup" (change)="onSelectionChange(entry)" [checked]="(idx === 0)" [value]="entry.value"></td>
</tr>
</tbody>
</table>
<hr>
<pre>
{{ this.selectedEntry | json }}
</pre>
</div>
`,
})
export class App {
entries = [];
selectedEntry: { [key: string]: any } = {
value: null,
description: null
};
constructor() {
}
ngOnInit() {
this.entries = [
{
description: 'entry 1',
value: 1
},
{
description: 'entry 2',
value: 2
},
{
description: 'entry 3',
value: 3
},
{
description: 'entry 4',
value: 4
}
];
// select the first one
if(this.entries) {
this.onSelectionChange(this.entries[0]);
}
}
onSelectionChange(entry) {
// clone the object for immutability
this.selectedEntry = Object.assign({}, this.selectedEntry, entry);
}
}
@NgModule({
imports: [ BrowserModule ],
declarations: [ App ],
bootstrap: [ App ]
})
export class AppModule {}
