我想在用户保存数据时显示Bootstrap警报。
我的代码如下:
html页面:
<div class="alert alert-success" *ngIf="saveSuccess">
<strong>Success!</strong>
</div>
<form #f="ngForm" (submit)="saveUser(f.value)">
/////Some form fields
<button class="form-control btn btn-primary" type="submit">save</button>
</form>
app.component.ts:
export class UserProfileComponent{
saveSuccess: boolean;
user: IUser;
saveUser(user:IUser) {
this.headers = new Headers();
this.headers.append('Content-Type', 'application/json');
this.editUserForm = user;
this._http.post('api/user/'+this._current_user._id, JSON.stringify(this.editUserForm),{
headers: this.headers
}).subscribe(function(data) {
// if the update is successful then set the value to true
// this is getting updated
if (data){
this.saveSuccess = true;
}
else{
this.saveSuccess = false;
}
});
}
}
我想在POST成功完成后显示警告。
我想我错过了如何绑定&#39; saveSuccess&#39;变量为html,以便在成功保存完成后显示警报。 (我是Angular2的新手)
答案 0 :(得分:5)
昨晚我没有看到它,可能为时已晚。但是您的问题是在设置this
的内联函数中没有saveSuccess
上下文。
我建议您使用lambdas或&#34;胖箭头功能&#34;。而不是
function(data) { ... }
你做了
(data) => { ... }
这样将保留this
上下文。只需在任何需要内联功能的地方使用它,您就不会有任何问题了! :)
使用lambda函数的代码:
export class UserProfileComponent{
saveSuccess: boolean;
user: IUser;
saveUser(user:IUser) {
this.headers = new Headers();
this.headers.append('Content-Type', 'application/json');
this.editUserForm = user;
this._http.post('api/user/'+this._current_user._id, JSON.stringify(this.editUserForm),{
headers: this.headers
})
.map((data: Response) => data.json) // <-- also add this to convert the json to an object
.subscribe((data) => { // <-- here use the lambda
// if the update is successful then set the value to true
// this is getting updated
if (data){
this.saveSuccess = true;
}
else{
this.saveSuccess = false;
}
});
}
}
答案 1 :(得分:1)
考虑这个动态警报组件:
Angular2 Service which create, show and manage it's inner Component? How to implement js alert()?
例如:
this.alertCtmService.alertOK("Save changes???").subscribe(function (resp) {
console.log("alertCtmService.alertOK.subscribe: resp=" + resp.ok);
this.saveData();
}.bind(this) );