克隆控件 - C# (Winform)
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Clone Controls - C# (Winform)
提问by Farid-ur-Rahman
Possible Duplicate:
It is possible to copy all the properties of a certain control? (C# window forms)
可能的重复：
是否可以复制某个控件的所有属性？(C# 窗体)
I have to create some controls similar to a control created as design time. The created control should have same properties as a predefined control, or in other words I want to copy a control. Is there any single line of code for that purpose? or I have to set each property by a line of code? I am doing right now is:
我必须创建一些类似于在设计时创建的控件的控件。创建的控件应该与预定义的控件具有相同的属性，或者换句话说，我想复制一个控件。是否有任何一行代码用于此目的？或者我必须通过一行代码设置每个属性？我现在正在做的是：
ListContainer_Category3 = new FlowLayoutPanel();
ListContainer_Category3.Location = ListContainer_Category1.Location;
ListContainer_Category3.BackColor = ListContainer_Category1.BackColor;
ListContainer_Category3.Size = ListContainer_Category1.Size;
ListContainer_Category3.AutoScroll = ListContainer_Category1.AutoScroll;
回答by Marcel Roma
Generally speaking you can use reflection to copy the public properties of an object to a new instance.
一般来说，您可以使用反射将对象的公共属性复制到新实例。
When dealing with Controls however, you need to be cautious. Some properties, like WindowTarget are meant to be used only by the framework infrastructure; so you need to filter them out.
但是，在处理控件时，您需要谨慎。某些属性，例如 WindowTarget 只能由框架基础结构使用；所以你需要过滤掉它们。
After filtering work is done, you can write the desired one-liner:
过滤工作完成后，就可以写出想要的单行了：
Button button2 = button1.Clone();
Here's a little code to get you started:
这里有一些代码可以帮助您入门：
public static class ControlExtensions
{
public static T Clone<T>(this T controlToClone)
where T : Control
{
PropertyInfo[] controlProperties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
T instance = Activator.CreateInstance<T>();
foreach (PropertyInfo propInfo in controlProperties)
{
if (propInfo.CanWrite)
{
if(propInfo.Name != "WindowTarget")
propInfo.SetValue(instance, propInfo.GetValue(controlToClone, null), null);
}
}
return instance;
}
}
Of course, you still need to adjust naming, location etc. Also maybe handle contained controls.
当然，你仍然需要调整命名、位置等。也可能处理包含的控件。
