Javascript 如何使用ng multiselect下拉列表将选择选项设置为角度中的默认选择?
所以这里我从数据库中获取数据并将其存储到事件数组中。此事件数组数据使用ng multiselect下拉列表显示在book-ticket.component.html上。从这里开始,选择一个选项,此数据对应于存储在this.event中的选定项Javascript 如何使用ng multiselect下拉列表将选择选项设置为角度中的默认选择?,javascript,html,angular,web,mean-stack,Javascript,Html,Angular,Web,Mean Stack,所以这里我从数据库中获取数据并将其存储到事件数组中。此事件数组数据使用ng multiselect下拉列表显示在book-ticket.component.html上。从这里开始,选择一个选项,此数据对应于存储在this.event中的选定项 我正在将另一个组件的id传递给这个book-ticket.component,在这里我们使用 this.idByAllEvents = this.activatedRoute.snapshot.params.id; book ticket组件的HTML部
我正在将另一个组件的id传递给这个book-ticket.component,在这里我们使用
this.idByAllEvents = this.activatedRoute.snapshot.params.id;
book ticket组件的HTML部分是
<div class="form-group">
<label>Event</label>
<ng-multiselect-dropdown [placeholder]="'Select the Event'" [data]="this.events" name="event"
[(ngModel)]="this.event" [settings]="dropdownSettings1">
</ng-multiselect-dropdown>
</div>
export class BookTicketComponent implements OnInit {
user:User;
event:Event;
offer:Offer;
// offer:string;
// event:string;
idByAllEvents: string; // This is coming from all events page
price:number;
percentageReduce:number;
offers:Offer[];
events:Event[];
dropdownSettings1: IDropdownSettings;
dropdownSettings2: IDropdownSettings;
selectedItem: any[];
constructor(private Userservice:UserService,private Offerservice:OfferService,
private Eventservice:EventService, private router:Router,
private activatedRoute:ActivatedRoute) {
this.idByAllEvents = this.activatedRoute.snapshot.params.id;
console.log(this.idByAllEvents);
this.user = new User();
// this.offer = new Offer();
// this.event = new Event();
// this.offer = new Offer();
// this.event = new Event();
this.selectedItem = [];
}
ngOnInit() {
this.dropdownSettings1 = {
singleSelection: true,
idField: '_id',
textField: 'name',
selectAllText: 'Select All',
unSelectAllText: 'UnSelect All',
itemsShowLimit: 3,
allowSearchFilter: true,
closeDropDownOnSelection: true,
};
this.Eventservice.GetEvents().subscribe(res => {
this.events = res;
this.justExecute();
this.Offerservice.GetOffers().subscribe(res => {
this.offers = res
})
});
justExecute(){
console.log(this.idByAllEvents);
console.log(this.events);
for (let index = 0; index < this.events.length; index++) {
const element = this.events[index]._id;
console.log(element);
if(element == this.idByAllEvents){
this.selectedItem.push(this.events[element]);
// this.selectedItem = this.events[element]
}
}
console.log(this.selectedItem);
}
}
SaveData(form:NgForm) {
if(form.valid) {...}
}
}
事件
.ts预订票证组件的一部分是
<div class="form-group">
<label>Event</label>
<ng-multiselect-dropdown [placeholder]="'Select the Event'" [data]="this.events" name="event"
[(ngModel)]="this.event" [settings]="dropdownSettings1">
</ng-multiselect-dropdown>
</div>
export class BookTicketComponent implements OnInit {
user:User;
event:Event;
offer:Offer;
// offer:string;
// event:string;
idByAllEvents: string; // This is coming from all events page
price:number;
percentageReduce:number;
offers:Offer[];
events:Event[];
dropdownSettings1: IDropdownSettings;
dropdownSettings2: IDropdownSettings;
selectedItem: any[];
constructor(private Userservice:UserService,private Offerservice:OfferService,
private Eventservice:EventService, private router:Router,
private activatedRoute:ActivatedRoute) {
this.idByAllEvents = this.activatedRoute.snapshot.params.id;
console.log(this.idByAllEvents);
this.user = new User();
// this.offer = new Offer();
// this.event = new Event();
// this.offer = new Offer();
// this.event = new Event();
this.selectedItem = [];
}
ngOnInit() {
this.dropdownSettings1 = {
singleSelection: true,
idField: '_id',
textField: 'name',
selectAllText: 'Select All',
unSelectAllText: 'UnSelect All',
itemsShowLimit: 3,
allowSearchFilter: true,
closeDropDownOnSelection: true,
};
this.Eventservice.GetEvents().subscribe(res => {
this.events = res;
this.justExecute();
this.Offerservice.GetOffers().subscribe(res => {
this.offers = res
})
});
justExecute(){
console.log(this.idByAllEvents);
console.log(this.events);
for (let index = 0; index < this.events.length; index++) {
const element = this.events[index]._id;
console.log(element);
if(element == this.idByAllEvents){
this.selectedItem.push(this.events[element]);
// this.selectedItem = this.events[element]
}
}
console.log(this.selectedItem);
}
}
SaveData(form:NgForm) {
if(form.valid) {...}
}
}
导出类BookTicketComponent实现OnInit{
用户:用户;
事件:事件;
要约:要约;
//报价:字符串;
//事件:字符串;
IDbyalEvents:string;//这来自“所有事件”页面
价格:数量;
百分比减少:数字;
报价:报价[];
事件:事件[];
下降设置1:IDropdownSettings;
下降设置2:IDropdownSettings;
selectedItem:any[];
构造函数(私有Userservice:Userservice,私有Offerservice:Offerservice,
私有事件服务:事件服务,私有路由器:路由器,
私有activatedRoute:activatedRoute){
this.idbyalEvents=this.activatedRoute.snapshot.params.id;
console.log(this.idbyalevents);
this.user=新用户();
//this.offer=新的offer();
//this.event=新事件();
//this.offer=新的offer();
//this.event=新事件();
this.selectedItem=[];
}
恩戈尼尼特(){
此参数为0.dropdownSettings1={
单选:对,
idField:“\u id”,
textField:'名称',
selectAllText:“全选”,
unSelectAllText:“取消全部选择”,
项目限制:3,
allowSearchFilter:正确,
closeDropDownOnSelection:没错,
};
this.Eventservice.GetEvents().subscribe(res=>{
this.events=res;
this.justExecute();
this.Offerservice.GetOffers().subscribe(res=>{
this.offers=res
})
});
justExecute(){
console.log(this.idbyalevents);
console.log(this.events);
for(让index=0;index
我希望在HTML页面上默认选择与this.idbyalEvents对应的选项。但下拉列表显示了this.events的所有选项
我尝试使用函数justExecute设置selectedItem,但是console.log(this.selectedItem)
给出了未定义的数组。
如果我们在selectedItem中获得对应于IDbyalEvents的值,那么我们可以在html页面上使用[(ngModel)]=“selectedItem”
来选择该值
我们应该如何做到这一点。
如果在反应式表单的
FormGroup
中使用了ng multiselect下拉列表
,请确保包含[ngModelOptions]='{standalone:true}'
如果在反应式表单的FormGroup
中使用了ng multiselect下拉列表
,请确保包含[ngModelOptions]='{standalone:true}'
在justExecute(res)中传递响应,然后尝试执行功能。我想它会起作用..点击try@AsisThanks进行回复,我通过了,现在我在selectedItem中获得了值,但当我设置[(ngModel)]=“selectedItem时它给出了错误。您得到的错误不是在下拉列表中自动选择selectedItem的值。selectedItem是一个数组,其中包含一个元素作为事件对象。在justExecute(res)中传递响应然后试着做这个功能。我想它会起作用的。点击try@AsisThanks进行回复,我通过了,现在我在selectedItem中得到了值,但是当我设置[(ngModel)]=“selectedItem”它给出了错误。您得到的错误不是在下拉列表中自动选择selectedItem的值。selectedItem是一个数组,其中包含一个元素作为事件对象。