vb.net 如何有一个无形的启动窗体？
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How to have an invisible start up form?
提问by user1632018
I have an application that is a part of a solution of projects. In this project I would like for it to start up form to be invisible, but still have a notification icon in the tray visible for this form.
我有一个应用程序，它是项目解决方案的一部分。在这个项目中，我希望它启动表单时不可见，但在此表单的托盘中仍然有一个通知图标。
I know that adding me.hideinto the form_loaddoesn't work. I tried adding a module that instantiates the startup form and I set it as the startup object. Although that didn't work either. I am running out of ideas to have this form invisible. Could anyone help out? I am using VB.NET.
我知道添加me.hide到form_load中不起作用。我尝试添加一个实例化启动表单的模块，并将其设置为启动对象。虽然那也没有用。我已经没有办法让这种形式隐形了。有人可以帮忙吗？我正在使用 VB.NET。
回答by Hans Passant
Paste this in your form code:
将此粘贴到您的表单代码中：
Protected Overrides Sub SetVisibleCore(ByVal value As Boolean)
If Not Me.IsHandleCreated Then
Me.CreateHandle()
value = False
End If
MyBase.SetVisibleCore(value)
End Sub
The way that works is that the very first request to show the form, done by the Application class, this code overrides the Visible property back to False. The form will behave as normal after this, you can call Show() to make it visible and Close() to close it, even when it was never visible. Note that the Load event doesn't fire until you show it so be sure to move any code in your event handler for it, if any, to the constructor or this override.
工作的方式是，由 Application 类完成的第一个显示表单的请求，此代码将 Visible 属性覆盖回 False。在此之后表单将正常运行，您可以调用 Show() 使其可见，并调用 Close() 关闭它，即使它从不可见。请注意，Load 事件在您显示它之前不会触发，因此请确保将事件处理程序中的任何代码（如果有）移动到构造函数或此覆盖。
回答by UnhandledExcepSean
Put this in the form's Shown event
把它放在表单的 Shown 事件中
Me.Visible = False
回答by craisin
The easiest way is to set the opacity of the form to 0%. When you want it to appear, set it back to 100%
最简单的方法是将表单的不透明度设置为 0%。当您希望它出现时，将其设置回 100%
回答by Mark K
Here is another way that I've found to do this.
这是我发现的另一种方法。
Set the form properties with
设置表单属性
ShowInTaskbar = False
Then in the form's constructor add
然后在表单的构造函数中添加
WindowState = FormWindowState.Minimized
This is very easy to implement and works with no flicker. In my case I also use a NotifyIcon to access the program from the notification tray and just set
这很容易实现并且没有闪烁。在我的情况下，我还使用 NotifyIcon 从通知托盘访问程序并设置
WindowState = FormWindowState.Normal
Show()
BringToFront()
In the Notify_MouseClick event handler.
在 Notify_MouseClick 事件处理程序中。
To hide the form again after displaying it, just minimizing again doesn't quite do the job. In my case I use the Form_Closing event and just hide the form.
要在显示后再次隐藏表单，仅仅再次最小化并不能完成这项工作。就我而言，我使用 Form_Closing 事件并隐藏表单。
Hide()
回答by SimpleCoder
Use Me.Opacity = 0to hide the form on load event.
用于Me.Opacity = 0在加载事件时隐藏表单。
Then use the following code in the form.Shown event
然后在form.Shown事件中使用如下代码
Me.Hide()
Me.Opacity = 100
回答by tcarvin
Just to throw out a completely different approach, have you considered notusing the overload of Application.Run()that takes (and automatically shows) a Form? If you use the one that passes in an ApplicationContext(or more tyoically, your own subclass of ApplicationContext) then you can choose what your behavior is. See here for more details:
只是为了放弃一种完全不同的方法，您是否考虑过不使用Application.Run()take （并自动显示） a的重载Form？如果您使用传入 an ApplicationContext（或更典型地，您自己的 子类ApplicationContext）的那个，那么您可以选择您的行为。请参阅此处了解更多详情：
回答by Bogdan Damian
Try this:
尝试这个：
Sub New()
MyBase.SetVisibleCore(False)
End Sub
