小编Wat*_*son的帖子

public class SuperCar: Car
{
     public bool SuperWheels { get {return true; } }
}

public class Car 
{
     public bool HasSteeringWheel { get {return true;} }
}

如何设置派生Supercar的基类？

例如,我想简单地设置SuperCars基类,如下所示:

public void SetCar( Car car )
{
SuperCar scar = new SuperCar();
car.Base = car; 
}

基本上,如果我有Car对象,我不想手动遍历汽车的每个属性以设置SuperCar对象,我认为这是你可以做到的唯一方法,但如果你能以另一种方式做到这一点会好得多.

    String ns = Context.NOTIFICATION_SERVICE;
        NotificationManager mNotificationManager = (NotificationManager) this.getSystemService(ns);
        int icon = R.drawable.ic_launcher;
        CharSequence tickerText = title;
        long when = System.currentTimeMillis();             


        Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        if(alarmSound == null){
              alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
            if(alarmSound == null){
                alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            }
        }           

        Intent intent = new Intent();
        PendingIntent pendingIntent 
        = PendingIntent.getActivity(this, 0, intent, 0);    

        NotificationCompat.BigTextStyle bigxtstyle =
        new NotificationCompat.BigTextStyle();          
        bigxtstyle.bigText(text);               
        bigxtstyle.setBigContentTitle(title);


        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
            .setStyle(bigxtstyle)
            .setSmallIcon(icon)
            .setAutoCancel(true)

            .setSound(alarmSound)
            .setDeleteIntent(pendingIntent)                     
            .setContentIntent(PendingIntent.getActivity(this, 0, new Intent(), 0));     


        Notification noti = mBuilder.build();


        mNotificationManager.notify(notificationid++, noti);

此代码有效,并显示通过自动换行宣传的文本.但是,当后续通知发生时,先前的通知会丢失其文本.有人可以帮忙解决这个问题吗？它可能是我设置不正确的东西,我是android …

是否有可能在c#中执行类似以下的操作？

var tigerlist = new List<Tigers>(){ Tail = 10, Teeth = 20 };

var tigers_to_cats_approximation = new List<Cat>()
{    
     foreach (var tiger in tigerlist)
     {                 
           new Cat()
           {
               Tail = tiger.Tail / 2,
               Teeth = tiger.Teeth / 3,
               HousePet = true,
               Owner = new Owner(){ name="Tim" }
           }
     }
}

我正在做一些XML apis,进入的请求对象类似于需要出去的响应对象.如果可能,上述将是非常方便的; 比auto-mapper要多得多.

鉴于：

public class MyClass : INotifyPropertyChanged
{
    public List<string> _TestFire = new List<string>();

    string _StringProp;
    public string StringProp
    {
        get
        {
            return _StringProp;
        }
        set
        {
            if (_StringProp != value)
            {
                _StringProp = value;
                RaisePropertyChanged("StringProp");
                _TestFire.Add("fired " + DateTime.Now);
            }
        }
    }
}

当您序列化然后反序列化此类时，它会触发该RaisePropertyChanged事件，这是不希望的。当类被反序列化时，是否可以防止触发此事件？

var MyclassInstance = new MyClass() { StringProp = "None" };

MyclassInstance._TestFire.Clear(); // Clear property change history

var serobj = JsonConvert.SerializeObject();

var newitem = JsonConvert.DeserializeObject<MyClass>(serobj);

// newitem._TestFire.Count == 1, the set method was executed

bool …

使用IE 11,Windows 8.1.

我将以下内容插入到Windows窗体应用程序中:

 var html = "<iframe width=\"425\" height=\"350\" frameborder=\"0\" scrolling=\"no\" marginheight=\"0\" marginwidth=\"0\" " +
               "src=\"https://maps.google.com/maps?f=d&amp;source=s_d&amp;saddr=Oklahoma+City,+OK&amp;daddr=texas&amp;hl=en&amp;" +
               "geocode=FSgxHQIddAQw-imB0vh-VIqthzGdOk_RdBKiMw%3BFVfN5wEdi54L-ilJMoILNnBAhjE83ggYjxzrFg&amp;aq=t&amp;sll=39.632471," +
               "-56.554076&amp;sspn=61.466508,135.263672&amp;mra=ls&amp;ie=UTF8&amp;t=m&amp;z=7&amp;output=embed\">" +
               "</iframe>" +
               "<br /><small><a href=\"https://maps.google.com/maps?f=d&amp;source=embed&amp;saddr=Oklahoma+City,+OK&amp;daddr=texas" +
               "&amp;hl=en&amp;geocode=FSgxHQIddAQw-imB0vh-VIqthzGdOk_RdBKiMw%3BFVfN5wEdi54L-ilJMoILNnBAhjE83ggYjxzrFg&amp;aq=t&amp;" +
               "sll=39.632471,-56.554076&amp;sspn=61.466508,135.263672&amp;mra=ls&amp;ie=UTF8&amp;t=m&amp;z=7\" style=\"color:#0000FF;" +
               "text-align:left\">View Larger Map</a></small>";

        webBrowser1.DocumentText = (html);

现在我想打印这个,但是当我进入printpreview时它没有显示方向线

 private void button1_Click(object sender, EventArgs e)
    {
        this.webBrowser1.ShowPrintPreviewDialog();           
    }

我尝试过不同的浏览器模拟,但仍无法在谷歌地图中打印方向线.IE6 - 11没有运气.

 SetBrowserFeatureControlKey("FEATURE_BROWSER_EMULATION", fileName, GetBrowserEmulationMode());

     public static UInt32 GetBrowserEmulationMode()
    {
        int browserVersion = 7;
        using (var ieKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer",
            RegistryKeyPermissionCheck.ReadSubTree,
            System.Security.AccessControl.RegistryRights.QueryValues))
        {
            var version = ieKey.GetValue("svcVersion");
            if (null == …

忽略用户并专注于客户端-为了保护具有ID4的WebAPI项目，您可以添加令牌身份验证中间件，然后：

.AddIdentityServerAuthentication(options =>
            {
                options.Authority = "http://localhost:5000";
                options.RequireHttpsMetadata = false;

                options.ApiName = "api1";
            });

是否可以使用相同的WebAPI项目来保护其他API？

.AddIdentityServerAuthentication(options =>
            {
                options.Authority = "http://localhost:5000";
                options.RequireHttpsMetadata = false;

                options.ApiName = "api2";
            });

还是ResourceAPI和“ WebAPI宿主项目”之间的比例是1：1？

基本上，在客户端级别，我很好奇您是否可以为不同的客户端创建多个API但使用相同的WebAPI宿主项目。

创建面向 .net 4.5.1 的 winform 项目

安装包 PropertyChanged.Fody

[ImplementPropertyChanged]
public class PersonFody
{
    public string Name { get; set; }
}

PersonFody _fod = new PersonFody();

_fod. //Name is the only property and no events to subscribe

Is it possible to subscribe to a PropertyChanged event at design time using fody?

我为MySQL 5.5编写的一些查询不再适用于MySQL 5.7.我不确定是否有配置设置......

以下查询不再有效:

Update Tablex set Column1 = 3 where Tablex.ID = 20 and not exists (
    Select * From ( Select * from Tablex a where a.StartTime > :Start and a.EndTime <:end ) as DerivedTable1
)

//您无法在FROM子句中为更新指定目标表Tablex

这在MySQL 5.5中运行得很好,基本上这个想法是MySQL会创建一个临时表...但现在我猜不是.任何人都知道如何为MySQL 5.7更新这个？或者,我可以使用事务并预先查询存在条件,然后根据结果继续.