如何将不隐藏控件的自定义 Visible 属性 添加到 PropertyGrid?
How to add custom Visible property that doesn't hide the control to PropertyGrid?
我正在编写一个程序,用户可以在表单中编辑控件属性。要更改控件(文本框、标签等)属性,我正在使用 PropertyGrid
。我想添加自定义 Visible 属性 ,当它在运行时变为 False 时不会隐藏控件。仅在保存更改时更改可见性。
我正在使用 的解决方案来显示控件的特定属性,例如 {Text, BackColor, 前景色、字体、大小、位置、可见}等
private void CreateUIEditor(Control c)
{
if (c is Label)
{
propertyGrid.SelectedObject = new CustomObjectWrapper(c, new List<string>()
{ "Text", "BackColor", "ForeColor", "Font", "Visible"});
}
//...
}
public class CustomObjectWrapper : CustomTypeDescriptor
{
public object WrappedObject { get; private set; }
public List<string> BrowsableProperties { get; private set; }
public CustomObjectWrapper(object o, List<string> pList)
: base(TypeDescriptor.GetProvider(o).GetTypeDescriptor(o))
{
WrappedObject = o;
BrowsableProperties = pList;
}
public override PropertyDescriptorCollection GetProperties()
{
return this.GetProperties(new Attribute[] { });
}
public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
{
var properties = base.GetProperties(attributes).Cast<PropertyDescriptor>()
.Where(p => BrowsableProperties.Contains(p.Name))
.Select(p => TypeDescriptor.CreateProperty(
WrappedObject.GetType(),
p,
p.Attributes.Cast<Attribute>().ToArray()))
.ToArray();
return new PropertyDescriptorCollection(properties);
}
}
这里的基本思想是有一个阴影 属性 不属于原始对象,但显示在 PropertyGrid 中。这样的属性可以属于代理class本身。
以下代理 class 将隐藏原来的 Visible
属性,但是它显示一个 Visible
属性,您可以更改但不会更改原始对象的可见性:
代码如下:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
public class CustomObjectWrapper : CustomTypeDescriptor
{
public object WrappedObject { get; private set; }
public List<string> BrowsableProperties { get; private set; }
public CustomObjectWrapper(object o, List<string> pList)
: base(TypeDescriptor.GetProvider(o).GetTypeDescriptor(o))
{
WrappedObject = o;
BrowsableProperties = pList;
}
public override PropertyDescriptorCollection GetProperties()
{
return this.GetProperties(new Attribute[] { });
}
public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
{
var properties = base.GetProperties(attributes).Cast<PropertyDescriptor>()
.Where(p => p.Name != "Visible")
.Where(p => BrowsableProperties.Contains(p.Name))
.Select(p => TypeDescriptor.CreateProperty(
WrappedObject.GetType(),
p,
p.Attributes.Cast<Attribute>().ToArray()))
.ToList();
if (BrowsableProperties.Contains("Visible"))
{
var p = TypeDescriptor.GetProperties(this, true)["Visible"];
properties.Add(TypeDescriptor.CreateProperty(
this.GetType(), p, new[] { BrowsableAttribute.Yes }));
}
return new PropertyDescriptorCollection(properties.ToArray());
}
public bool Visible { get; set; }
public override object GetPropertyOwner(PropertyDescriptor pd)
{
if (pd == null)
return base.GetPropertyOwner(pd);
else if (pd.Name == "Visible")
return this;
else
return WrappedObject;
}
}
我正在编写一个程序,用户可以在表单中编辑控件属性。要更改控件(文本框、标签等)属性,我正在使用 PropertyGrid
。我想添加自定义 Visible 属性 ,当它在运行时变为 False 时不会隐藏控件。仅在保存更改时更改可见性。
我正在使用
private void CreateUIEditor(Control c)
{
if (c is Label)
{
propertyGrid.SelectedObject = new CustomObjectWrapper(c, new List<string>()
{ "Text", "BackColor", "ForeColor", "Font", "Visible"});
}
//...
}
public class CustomObjectWrapper : CustomTypeDescriptor
{
public object WrappedObject { get; private set; }
public List<string> BrowsableProperties { get; private set; }
public CustomObjectWrapper(object o, List<string> pList)
: base(TypeDescriptor.GetProvider(o).GetTypeDescriptor(o))
{
WrappedObject = o;
BrowsableProperties = pList;
}
public override PropertyDescriptorCollection GetProperties()
{
return this.GetProperties(new Attribute[] { });
}
public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
{
var properties = base.GetProperties(attributes).Cast<PropertyDescriptor>()
.Where(p => BrowsableProperties.Contains(p.Name))
.Select(p => TypeDescriptor.CreateProperty(
WrappedObject.GetType(),
p,
p.Attributes.Cast<Attribute>().ToArray()))
.ToArray();
return new PropertyDescriptorCollection(properties);
}
}
这里的基本思想是有一个阴影 属性 不属于原始对象,但显示在 PropertyGrid 中。这样的属性可以属于代理class本身。
以下代理 class 将隐藏原来的 Visible
属性,但是它显示一个 Visible
属性,您可以更改但不会更改原始对象的可见性:
代码如下:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
public class CustomObjectWrapper : CustomTypeDescriptor
{
public object WrappedObject { get; private set; }
public List<string> BrowsableProperties { get; private set; }
public CustomObjectWrapper(object o, List<string> pList)
: base(TypeDescriptor.GetProvider(o).GetTypeDescriptor(o))
{
WrappedObject = o;
BrowsableProperties = pList;
}
public override PropertyDescriptorCollection GetProperties()
{
return this.GetProperties(new Attribute[] { });
}
public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
{
var properties = base.GetProperties(attributes).Cast<PropertyDescriptor>()
.Where(p => p.Name != "Visible")
.Where(p => BrowsableProperties.Contains(p.Name))
.Select(p => TypeDescriptor.CreateProperty(
WrappedObject.GetType(),
p,
p.Attributes.Cast<Attribute>().ToArray()))
.ToList();
if (BrowsableProperties.Contains("Visible"))
{
var p = TypeDescriptor.GetProperties(this, true)["Visible"];
properties.Add(TypeDescriptor.CreateProperty(
this.GetType(), p, new[] { BrowsableAttribute.Yes }));
}
return new PropertyDescriptorCollection(properties.ToArray());
}
public bool Visible { get; set; }
public override object GetPropertyOwner(PropertyDescriptor pd)
{
if (pd == null)
return base.GetPropertyOwner(pd);
else if (pd.Name == "Visible")
return this;
else
return WrappedObject;
}
}