我写了用户控件(是的!)。但我希望它表现为一个容器。可是等等!我知道
[Designer("System.Windows.Forms.Design.ParentControlDesigner, System.Design",
typeof(IDesigner))]
圈套。
问题是 - 我不希望我的所有控件都像容器一样,但只有一部分。一个 - 事实上 - 小组;)
为了给出更广泛的背景:我编写了一个具有Grid的控件,一些常用的按钮,标签和功能。但它也有一个部分,用户应该放弃他的自定义按钮/控制任何东西。只有在控制的这个特定部分,没有其他地方。
任何人都有任何想法?
答案 0 :(得分:2)
您应该执行以下操作:
EnableDesignMode
方法在设计时启用内部面板。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; }
}
}
内部面板的设计器
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));
}
}
}
用户控件的设计器
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;
}
}
示例强>
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