小编Rob*_*tto的帖子

我启动并运行了AWS RDS实例.当从我的网站(也在AWS,同一地区)查询数据库时,它运行得很漂亮.但是,如果我尝试从我的本地开发机器连接到数据库,则需要AGES才能执行任何查询.有谁知道为什么？我打开了安全组以允许连接(当我尝试从本地机器连接时).

我有一张卡片，上面有一些信息。我想将它包装在 SingleChildScrollView 中，因为我有更多的项目要添加到卡片中，但是当我这样做时，屏幕只是空白？我试过把它作为根（脚手架主体）放在卡之前，但它不起作用？

 return Scaffold(
        backgroundColor: globals.pageBackgroundColor,
        appBar: AppBar(
            title: Text('Company name'),
            leading: new IconButton(
                icon: new Icon(Icons.arrow_back),
                onPressed: () {
                  Navigator.pop(context, true);
                })),
        body: Padding(
            padding: EdgeInsets.all(10),
            child: Card(
                child: Container(
                    decoration:
                        BoxDecoration(color: globals.widgetBackgroundColor),
                    child: Column(
                      children: <Widget>[
                      Container(
                          height: 120,
                          width: double.infinity,
                          decoration: BoxDecoration(color: Colors.white),
                          child: Row(
                            children: <Widget>[
                              Padding(
                                  padding: EdgeInsets.fromLTRB(10, 0, 0, 0),
                                  child: Container(
                                      alignment: Alignment.centerLeft,
                                      width: 100,
                                      height: 100,
                                      child: Image.network("https://via.placeholder.com/200"))),
                              Expanded(
                                child: Padding(
                                    padding: EdgeInsets.fromLTRB(30, 20, 10, 0),
                                    child: Column(
                                      crossAxisAlignment:
                                          CrossAxisAlignment.start,
                                      children: …

我有一个设计，其中SingleChildScrollView在屏幕的前50％处具有GoogleMap，而在较低的50％中具有项目列表。用户可以向上滚动整个视图以查看所有列表。但是，有时，如果用户滚动页面，则Map会停止触发onCameraIdle，而只是不会再次触发它。

onCameraMove和onTap可以正常工作。只是onCameraIdle不会触发。

 SingleChildScrollView(
        child: Column(
          children: <Widget>[
            Stack(
              children: <Widget>[
                Container(
                  height: screenSize.height / 2,
                  child: GoogleMap(
                    key: Key("GMap"),
                    mapType: MapType.normal,
                    markers: Set<Marker>.of(markers.values),
                    gestureRecognizers: Set()
                      ..add(Factory<PanGestureRecognizer>(
                          () => PanGestureRecognizer()))
                      ..add(
                        Factory<VerticalDragGestureRecognizer>(
                            () => VerticalDragGestureRecognizer()),
                      )
                      ..add(
                        Factory<HorizontalDragGestureRecognizer>(
                            () => HorizontalDragGestureRecognizer()),
                      )
                      ..add(
                        Factory<ScaleGestureRecognizer>(
                            () => ScaleGestureRecognizer()),
                      ),
                    initialCameraPosition: CameraPosition(
                        target: LatLng(14.551620, 121.053329), zoom: 14.5),
                    onMapCreated: (GoogleMapController controller) {
                      if (!_controller.isCompleted) {
                        _controller.complete(controller);
                        _lastCameraPosition = CameraPosition(
                            target: LatLng(14.551620, 121.053329), zoom: 14.5);
                      }
                    },
                    myLocationEnabled: true,
                    myLocationButtonEnabled: true,
                    onCameraIdle: () {
                      print("547: …

我的引导标签没有按预期包裹在我的DIV中？他们只是继续离开屏幕？有谁知道为什么？我已经包含了截图,代码如下:

<div class="container" style="margin-top:100px;">
      <div class="row">
        <div class="col-md-12">
            <div class="pull-right form-inline">
                <div id="ctl00_ContentPlaceHolder1_divParkingArea" class="form-group">
                <label>Parking Area:</label><br />
                <select name="ctl00$ContentPlaceHolder1$ddParkingArea" onchange="javascript:setTimeout(&#39;__doPostBack(\&#39;ctl00$ContentPlaceHolder1$ddParkingArea\&#39;,\&#39;\&#39;)&#39;, 0)" id="ctl00_ContentPlaceHolder1_ddParkingArea" class="form-control" style="width: 200px; float: left;">
                     <option selected="selected" value="7">Test Parking Area XXX</option>
                     <option value="5">Tower A Parking</option>
                     <option value="6">Tower B Parking</option>

                </select>
                </div>                  
            </div>
        </div>
    </div>
    <br />
    <div class="row">
        <div class="col-md-12">
            <div class="well" style="background: #fff;">
                <div id="ctl00_ContentPlaceHolder1_parkingAreaOverview" style="width:600px;"><h3>Level 2</h3><hr><span class="label label-success">SlotSlotSlotSlot 11</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot 22</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot 33</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot 44</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot 55</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot 66</span>&nbsp;&nbsp;<span class="label label-success">SlotSlotSlotSlot …

尝试根据我的应用程序中的用户状态（已登录或未登录）进行重定向，但它不会像我希望的那样工作，因为我不确定如何在方法中获取 BuildContext。

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:t2/helpers/currentuser.dart';

import 'screens/dashboard.dart';
import 'screens/login.dart';

void main() => runApp(new MyApp());

CurrentUser user = new CurrentUser();

Future checkActiveUser() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();

  user.usr = prefs.get('usr');
  user.pwd = prefs.get('pwd');
  if (user.usr.length == 0 && user.pwd.length == 0) {
    user.isLoggedIn = false;
    Navigator.of(x).pushNamedAndRemoveUntil('/dashboard', (Route<dynamic> route) => false);
  } else {
    // Send to login screen
    user.isLoggedIn = false;
    Navigator.of(x).pushNamedAndRemoveUntil('/login', (Route<dynamic> route) => false);
  }

  return user.isLoggedIn;

  /*
// How to read/write …

尝试调用刚刚为 ChatGPT 发布的 got-3.5-turbo API，但我收到了错误的请求错误？

    var body = new
                    {
                        model = "gpt-3.5-turbo",
                        messages = data
                    };

                    string jsonMessage = JsonConvert.SerializeObject(body);

  using (HttpClient client = new HttpClient())
                    {
                        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

                        HttpRequestMessage requestMessage = new
                        HttpRequestMessage(HttpMethod.Post, "https://api.openai.com/v1/completions")
                        {
                            Content = new StringContent(jsonMessage, Encoding.UTF8, "application/json")
                        };

                        string api_key = PageExtension_CurrentUser.Community.CAIChatGPTAPIKey.Length > 30 ? PageExtension_CurrentUser.Community.CAIChatGPTAPIKey : Genesis.Generic.ReadAppSettingsValue("chatGPTAPIKey");
                        requestMessage.Headers.Add("Authorization", $"Bearer {api_key}");

                        HttpResponseMessage response = client.SendAsync(requestMessage).Result;
                        if (response.StatusCode == HttpStatusCode.OK)
                        {
                            string responseData = response.Content.ReadAsStringAsync().Result;
                            dynamic responseObj = JsonConvert.DeserializeObject(responseData);
                            string choices = responseObj.choices[0].text;
                           
                    } …

我正在尝试将XML序列化为对象.但是,我遇到了一些麻烦.我可能已经在网上发布了关于答案的帖子,但我还没弄清楚.请让我解释一下:

我有以下要序列化的XML:

<Import_RootObject>
 <Organizations>
  <Import_Organization OrgNr="xxxx">
   <Events>
    <Import_Event StartTime="2012-01-01 09:00:00" EndTime="2012-01-02 12:00:00">
    <Players>
     <Import_Player PersonNummer="1111" />
     <Import_Player PersonNummer="2222" />
     <Import_Player PersonNummer="3333" />
     <Import_Player PersonNummer="4444" />
    </Players>
   </Import_Event>
  </Events>
 </Import_Organization>
</Organizations>

我使用四个类来捕获这个XML:

using System;
using System.Collections.Generic;
using System.Xml.Serialization;

[XmlRoot("Import_RootObject")]
public class Import_RootObject
{
    [XmlArray("organizations")]
    [XmlArrayItem("organizations")]
    public List<Import_Organization> Organizations { get; set; }
}



using System;
using System.Collections.Generic;
using System.Xml.Serialization;

public class Import_Organization
{
    [XmlAttribute("orgnr")]
    public string OrgNr { get; set; }

    [XmlArray("events")]
    [XmlArrayItem("events")]
    public List<Import_Event> Events { get; set; }

} …

我在MVC应用程序中有以下内容:

        var selectedArticles =
            vm.Articles.Except(
                vm.Articles.Where(x => x.Quantity == 0)).ToList();

我需要添加另一个参数.我不想显示选项HideUntilDate!= NULL && HideUntilDate>今天日期的文章

有小费吗？