隐藏组合控件的某个子控件属性问题

来源：互联网发布：华美淘宝客使用说明编辑：程序博客网时间：2024/06/06 02:11

写了个想隐藏一个组合控件的子控件属性的 Designer，只要加在控件上，窗体以及该窗体上的控件的所有属性都被隐藏了，

我只想显示DemoControl上面子控件 Box的标记了CustomHelperAttribute 特性的属性，其余都隐藏，结果所有的都隐藏了。

大家帮忙分析分析下。

[Designer(typeof(ChildrenPropertiesFilterDesigner), typeof(IDesigner))]
public class DemoControl: Control

{

private TextBox box;

public TextBox Box

{

get{ return box ;}

}

public DemoControl()

{

box = new TextBox();

//此处一些代码省略。。。

this.Controls.Add(box);

}

[CustomHelperAttribute ("仅显示这个属性。", true)]

public string ShowMe

{

get; set;

}

public class ChildrenPropertiesFilterDesigner : ControlDesigner

{
/// <summary>
/// 设置控件的属性Visible
/// </summary>
/// <param name="component"></param>
private void SetPropertyVisible(Object component)
{
Type browseType = typeof(BrowsableAttribute);
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(component);
foreach (PropertyDescriptor p in properties)
{
AttributeCollection attrs = properties[p.Name].Attributes;
AttributeCollection piAtrrs = p.Attributes;
bool visible = false;
foreach (Attribute a in piAtrrs)
{
if (a.GetType() == typeof(CustomHelperAttribute))
{
CustomHelperAttribute ca = (CustomHelperAttribute)a;
visible = ca.AllowShow;
break;
}
}

if (visible == false)
{
FieldInfo field = browseType.GetField("browsable", BindingFlags.Instance | BindingFlags.NonPublic);
field.SetValue(attrs[browseType], visible);
}
}
}

protected override void PreFilterProperties(IDictionary properties)
{
TextBox box = (TextBox)base.Control.Controls[0];
if (box != null)
{
SetPropertyVisible(box);
}

base.PreFilterProperties(properties);
}
}