小编Gee*_*san的帖子

我试图在我的角应用程序中集成谷歌云存储,它导致了这个错误

错误:未捕获(在承诺中):TypeError:Object(...)不是函数

当我启动我的服务到构造函数

这是我正在使用的服务:

import { Injectable } from '@angular/core';
import { AngularFirestore, AngularFirestoreCollection,
        AngularFirestoreDocument } from 'angularfire2/firestore';
import { Idata } from '../model';
import { Observable } from 'rxjs/Observable';
@Injectable()
export class DataService {

  // collections initialisation
  datas: Observable<Idata[]>;
  dataCollection: AngularFirestoreCollection<Idata>;
  dataDocumment: AngularFirestoreDocument<Idata>;
  data: Observable<Idata>;
  constructor(public afs: AngularFirestore) {
   }

   // get all documents for caucus
   getDataCaucus() {
    this.dataCollection = this.afs.collection('eluCC');
    this.datas = this.afs.collection('eluCC').snapshotChanges().map(changes => {
      return changes.map(a => {
        const data = a.payload.doc.data() as Idata;
        data.id = a.payload.doc.id; …

有没有人知道如何解决此错误消息

错误CS1729:'SQLiteConnection'不包含带有1个参数的构造函数(CS1729)

这是它发生的文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using SQLite;
using Android.Util;

using SQLite.Net;

namespace CPDEP1
{
    public class DataBase
    {
        string folder = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        public bool createDataBase()
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")));
                {
                    connection.CreateTable<Person>();
                    return true;
                }
            }
            catch(SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }

        public bool insertIntoTablePerson(Person person)
        {
            try
            {
                using (var connection = new …

每当我尝试过滤表格的一列时,我都会遇到此错误.我从FireStore云集合中获取数据,并且每个文档中的字段auteur都已明确定义.

这是我的组件的样子

import { Component, OnInit, ViewChild} from '@angular/core';

import { Router } from '@angular/router';
import { DataService } from '../../services/data.service';
import { Observable } from 'rxjs/Observable';
import { AngularFirestore } from 'angularfire2/firestore';
import { AuthentificationService } from '../../services/authentification.service';

@Component({
  selector: 'app-data-preview',
  templateUrl: './data-preview.component.html',
  styleUrls: ['./data-preview.component.css']
})
export class DataPreviewComponent implements OnInit {
  rows = [];
  temp = [];
  selected: any[] = [];
  columns;
  panelOpenState = false;
  id: any;

  @ViewChild(DataPreviewComponent) table: DataPreviewComponent;

  constructor(private router: Router, private dataService: DataService,
     private afs: …

我已经设置了一个带有 firebase 电子邮件和密码登录的身份验证防护，问题是它会自动触发到指定组件的路由。

我已经实现了身份验证保护并将其设置在正确的模块提供程序中（因为我的应用程序中有很多提供程序）。这是我的身份验证服务：

import { Injectable } from '@angular/core';
import { Router, Route ,CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, CanActivateChild, CanLoad } from '@angular/router';
import { Observable } from 'rxjs/Observable';
import { SimpleAuthService } from './simple-auth.service';

@Injectable()
export class AuthGuard implements CanActivate, CanActivateChild, CanLoad {
  constructor(private authService: SimpleAuthService) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    const url: string = state.url;
    return this.checkLogin(url);
  }

  canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    return this.canActivate(route, state);
  }

  canLoad(route: Route): Observable<boolean> {
    const url: string = …