C# 带有标题和内容的UserControl-允许在内容面板中放置控件，并防止在设计时将控件放置在标题中

我写了用户控制（耶！）。但我希望它像一个容器。但是等等！我知道

[Designer("System.Windows.Forms.Design.ParentControlDesigner, System.Design", 
    typeof(IDesigner))]

把戏

问题是-我不希望我的所有控件都像容器一样工作，只希望有一部分。一个事实上的专家组；）

为了提供更广泛的上下文：我编写了一个控件，该控件具有网格、一些常用按钮、标签和功能。但它也有一个部分，用户应该放下自定义按钮/控件。只有在控件的这个特定部分，没有其他地方

---

有人知道吗

您应该执行以下操作：

• 对于用户控件，需要创建一个新的设计器，通过调用方法在设计时启用内部面板
• 对于内部面板，您需要创建一个设计器，该设计器将禁用移动、调整大小并从设计器中删除一些属性
• 你应该注册设计师

示例

您可以阅读有关此主题的博客文章，并克隆或下载一个工作示例：

代码

下面是解决方案不同元素的代码

您的用户控件

[Designer(typeof(MyUserControlDesigner))]
public partial class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
        TypeDescriptor.AddAttributes(this.panel1,
            new DesignerAttribute(typeof(MyPanelDesigner)));
    }
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    public Panel ContentsPanel
    {
        get { return panel1; }
    }
}

public class MyPanelDesigner : ParentControlDesigner
{
    public override SelectionRules SelectionRules
    {
        get
        {
            SelectionRules selectionRules = base.SelectionRules;
            selectionRules &= ~SelectionRules.AllSizeable;
            return selectionRules;
        }
    }
    protected override void PostFilterAttributes(IDictionary attributes)
    {
        base.PostFilterAttributes(attributes);
        attributes[typeof(DockingAttribute)] = 
            new DockingAttribute(DockingBehavior.Never);
    }
    protected override void PostFilterProperties(IDictionary properties)
    {
        base.PostFilterProperties(properties);
        var propertiesToRemove = new string[] {
            "Dock", "Anchor", "Size", "Location", "Width", "Height",
            "MinimumSize", "MaximumSize", "AutoSize", "AutoSizeMode",
            "Visible", "Enabled",
        };
        foreach (var item in propertiesToRemove)
        {
            if (properties.Contains(item))
                properties[item] = TypeDescriptor.CreateProperty(this.Component.GetType(),
                    (PropertyDescriptor)properties[item],
                    new BrowsableAttribute(false));
        }
    }
}

public class MyUserControlDesigner : ParentControlDesigner
{
    public override void Initialize(IComponent component)
    {
        base.Initialize(component);
        var contentsPanel = ((MyUserControl)this.Control).ContentsPanel;
        this.EnableDesignMode(contentsPanel, "ContentsPanel");
    }
    public override bool CanParent(Control control)
    {
        return false;
    }
    protected override void OnDragOver(DragEventArgs de)
    {
        de.Effect = DragDropEffects.None;
    }
    protected override IComponent[] CreateToolCore(ToolboxItem tool, int x,
        int y, int width, int height, bool hasLocation, bool hasSize)
    {
        return null;
    }
}

内部面板的设计师

[Designer(typeof(MyUserControlDesigner))]
public partial class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
        TypeDescriptor.AddAttributes(this.panel1,
            new DesignerAttribute(typeof(MyPanelDesigner)));
    }
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    public Panel ContentsPanel
    {
        get { return panel1; }
    }
}

public class MyPanelDesigner : ParentControlDesigner
{
    public override SelectionRules SelectionRules
    {
        get
        {
            SelectionRules selectionRules = base.SelectionRules;
            selectionRules &= ~SelectionRules.AllSizeable;
            return selectionRules;
        }
    }
    protected override void PostFilterAttributes(IDictionary attributes)
    {
        base.PostFilterAttributes(attributes);
        attributes[typeof(DockingAttribute)] = 
            new DockingAttribute(DockingBehavior.Never);
    }
    protected override void PostFilterProperties(IDictionary properties)
    {
        base.PostFilterProperties(properties);
        var propertiesToRemove = new string[] {
            "Dock", "Anchor", "Size", "Location", "Width", "Height",
            "MinimumSize", "MaximumSize", "AutoSize", "AutoSizeMode",
            "Visible", "Enabled",
        };
        foreach (var item in propertiesToRemove)
        {
            if (properties.Contains(item))
                properties[item] = TypeDescriptor.CreateProperty(this.Component.GetType(),
                    (PropertyDescriptor)properties[item],
                    new BrowsableAttribute(false));
        }
    }
}

public class MyUserControlDesigner : ParentControlDesigner
{
    public override void Initialize(IComponent component)
    {
        base.Initialize(component);
        var contentsPanel = ((MyUserControl)this.Control).ContentsPanel;
        this.EnableDesignMode(contentsPanel, "ContentsPanel");
    }
    public override bool CanParent(Control control)
    {
        return false;
    }
    protected override void OnDragOver(DragEventArgs de)
    {
        de.Effect = DragDropEffects.None;
    }
    protected override IComponent[] CreateToolCore(ToolboxItem tool, int x,
        int y, int width, int height, bool hasLocation, bool hasSize)
    {
        return null;
    }
}

用户控件的设计器

[Designer(typeof(MyUserControlDesigner))]
public partial class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
        TypeDescriptor.AddAttributes(this.panel1,
            new DesignerAttribute(typeof(MyPanelDesigner)));
    }
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    public Panel ContentsPanel
    {
        get { return panel1; }
    }
}

public class MyPanelDesigner : ParentControlDesigner
{
    public override SelectionRules SelectionRules
    {
        get
        {
            SelectionRules selectionRules = base.SelectionRules;
            selectionRules &= ~SelectionRules.AllSizeable;
            return selectionRules;
        }
    }
    protected override void PostFilterAttributes(IDictionary attributes)
    {
        base.PostFilterAttributes(attributes);
        attributes[typeof(DockingAttribute)] = 
            new DockingAttribute(DockingBehavior.Never);
    }
    protected override void PostFilterProperties(IDictionary properties)
    {
        base.PostFilterProperties(properties);
        var propertiesToRemove = new string[] {
            "Dock", "Anchor", "Size", "Location", "Width", "Height",
            "MinimumSize", "MaximumSize", "AutoSize", "AutoSizeMode",
            "Visible", "Enabled",
        };
        foreach (var item in propertiesToRemove)
        {
            if (properties.Contains(item))
                properties[item] = TypeDescriptor.CreateProperty(this.Component.GetType(),
                    (PropertyDescriptor)properties[item],
                    new BrowsableAttribute(false));
        }
    }
}

public class MyUserControlDesigner : ParentControlDesigner
{
    public override void Initialize(IComponent component)
    {
        base.Initialize(component);
        var contentsPanel = ((MyUserControl)this.Control).ContentsPanel;
        this.EnableDesignMode(contentsPanel, "ContentsPanel");
    }
    public override bool CanParent(Control control)
    {
        return false;
    }
    protected override void OnDragOver(DragEventArgs de)
    {
        de.Effect = DragDropEffects.None;
    }
    protected override IComponent[] CreateToolCore(ToolboxItem tool, int x,
        int y, int width, int height, bool hasLocation, bool hasSize)
    {
        return null;
    }
}

---

我不熟悉usercontrols，但是你能不能在你希望用户能够放置控件的区域上放置一个面板？也许您还需要更改它的

修饰符
属性panel@GuidoG-不幸的是，没有：（.modifier在继承时工作得很好，但就我所尝试的，没有办法使“可编辑性”这可能也是为什么我从不使用usercontrols，而是直接从我需要的内容或PanelReza继承的原因。当我第一次发现您的帖子时，我希望这对我有用。尝试将此示例应用于TableLayoutPanel。当我将内容面板的类型从一个面板更改为另一个TableLayoutPane时l（TLP）经过测试，当我将用户控件拖到设计图面上时，我丢失了布局面板的设计时功能。例如，当我选择ContentsPanel控件时，我看到了Columns属性，但当我将其从0更改为（比如）2时，这些列不会出现在控件的设计器实例上。我似乎也无法访问更高级的ced TLP属性（如行/列度量）。@Jazimov我认为它对
TableLayouPanel
不起作用，因为
TableLayoutPanel
。啊，这就是生活。：）我仍然对您的问题解决方案2感到满意。我希望其他人能从这一做法中受益。