如何防止 TabControl 中 UserControl 的延迟加载？
我刚刚发现 TabControl 中的 UserControls 在选择父 TabPage 之前不会加载。有没有办法防止这种延迟加载？我需要在主窗体加载时初始化用户控件。
I have just discovered that UserControls in a TabControl will not load until the parent TabPage is selected. Is there a way to prevent this delay loading? I need to initialize the UserControls when the main form loads.
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TabControl不会特殊对待它的控件，事实上，在任何情况下，UserControl上的Load事件紧接在UserControl之前发生都是正常的。第一次显示控制。TabPage负责显示控件，因此只有在首次选择时才会“加载”。为了克服这种（完全正常的）Windows 窗体行为，您可以将初始化代码移至单独的方法，并在
Form加载时调用它，或者您可以将初始化代码放在UserControl 中的构造函数。无论哪种方式，您都可以立即执行初始化。The
TabControldoes not treat its controls specially, in fact it is normal under all circumstances for theLoadevent on aUserControlto occur immediately before the control is displayed for the first time. TheTabPageis responsible for showing the control, therefore it will only be 'loaded' when first selected.To overcome this (perfectly normal) Windows Forms behaviour, you could move your initialisation code to a separate method and call it when the
Formloads, or you could just place your initialisation code in theUserControl's constructor instead. Either way, you can perform your initialisation immediately.您可以在表单的 Load 事件处理程序中为选项卡调用 Tabcontrol 的 SelectTab() 方法。
You can invoke Tabcontrol's SelectTab() method for the tabs in your Form's Load event handler.
我只是在寻找如何实现您描述的这种默认行为。我支持的应用程序不会延迟选项卡的加载。事实证明，选项卡是在加载事件而不是构造函数中初始化的。
因此，如果您在表单加载事件中将选项卡添加到选项卡控件，选项卡中的所有控件都会将其加载事件作为 TabPages.AddRange 调用的一部分触发
I was just searching how to achieve this default behaviour you describe. An application I support was not delaying the load of the tabs. Turns out the tabs were getting initialised in the load event instead of the constructor.
So if you add the tabs to the tabcontrol in the form load event all the controls in tabs will have their load events fired as a part of the TabPages.AddRange call