C＃用户控件作为自定义面板

Question

创建我自己的用户控件只包含一个面板：

当我在设计拖动myPanel对象，然后尝试添加按钮就可以了，按钮其实是在添加到窗体的控件。

是否有一个属性/属性，我必须设置为了执行此操作，另一种方法来做我想要的？

public class MyPanel : UserControl 
{ 
    private Panel panelMain; 

    public MyPanel() 
    { 
     InitializeComponent(); 
    } 

    private void InitializeComponent() 
    { 
     this.panelMain = new System.Windows.Forms.Panel(); 
     this.SuspendLayout(); 
     // 
     // panelMain 
     // 
     this.panelMain.BackColor = System.Drawing.SystemColors.ActiveCaption; 
     this.panelMain.Dock = System.Windows.Forms.DockStyle.Fill; 
     this.panelMain.Location = new System.Drawing.Point(0, 0); 
     this.panelMain.Name = "panelMain"; 
     this.panelMain.Size = new System.Drawing.Size(150, 150); 
     this.panelMain.TabIndex = 0; 
     // 
     // myPanel 
     // 
     this.Controls.Add(this.panelMain); 
     this.Name = "MyPanel"; 
     this.ResumeLayout(false); 
    } 
} 

Answer 1

这里看看

How to make a UserControl object acts as a control container design-time by using Visual C#

但是如果你只需要扩展面板功能，它能够更好地从面板直接继承。

Answer 2

为了更精确，我执行以下操作：

[Designer(typeof(myControlDesigner))] 
public class MyPanel : UserControl 
{ 
    private TableLayoutPanel tableLayoutPanel1; 
    private Panel panelMain; 
    ... 

    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] 
    public Panel InnerPanel 
    { 
     get { return panelMain; } 
     set { panelMain = value; } 
    } 

    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] 
    public TableLayoutPanel InnerTableLayout 
    { 
     get { return tableLayoutPanel1; } 
     set { tableLayoutPanel1 = value; } 
    } 
} 

随着myControlDesigner为[设计师（typeof运算（myControlDesigner））]是

class myControlDesigner : ParentControlDesigner 
{ 

    public override void Initialize(IComponent component) 
    { 

     base.Initialize(component); 

     MyPanel myPanel = component as MyPanel; 
     this.EnableDesignMode(myPanel.InnerPanel, "InnerPanel"); 
     this.EnableDesignMode(myPanel.InnerTableLayout, "InnerTableLayout"); 

    } 

} 

（其它来源：Add Control to UserControl）