http://www.codeproject.com/Articles/37830/Designing-Nested-Controls
假如一个复合控件由一个ToolStript和一个TextBox组成,如何使ToolStript获得设计时支持, 在设计时可以像使用普通ToolStript一样添加/删除控件?
直接把ToolStript设为Public是无法达到目的的。必须定义一个用于为组件实现设计时服务的Designer
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[Designer(typeof(MyDesigner))]
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public partial class UserControl1 : UserControl
MyDesigner继承自System.Windows.Forms.Design.ControlDesigner 类, 它提供了一个方法“EnableDesignMode”。使用它将启用子控件的设计时功能,但需要将子控件公开为主控件的属性。
全部代码如下:
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[Designer(typeof(MyDesigner))]
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public partial class UserControl1 : UserControl
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{
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public UserControl1()
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{
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InitializeComponent();
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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public ToolStrip MyToolStrip
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{
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get{ returnthis.toolStrip1 ; }
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}
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}
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internalclass MyDesigner : ControlDesigner
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{
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private UserControl1 MyControl;
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publicoverridevoid Initialize(IComponent component)
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{
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base.Initialize(component);
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// Record instance of control we're designing
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MyControl = (UserControl1)component;
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this.EnableDesignMode(MyControl.MyToolStrip, "MyToolStrip");
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}
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}