C# Visual Studio - 继承控件的新“默认”属性值
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Visual Studio - new "default" property values for inherited controls
提问by Clyde
I'm looking for help setting a new default property value for an inherited control in Visual Studio:
我正在寻找帮助为 Visual Studio 中的继承控件设置新的默认属性值：
class NewCombo : System.Windows.Forms.ComboBox
{
public NewCombo() { DropDownItems = 50; }
}
The problem is that the base class property DropDownItemshas a 'default' attribute set on it that is a different value (not 50). As a result, when I drag the control onto a form, the designer file gets an explicit mycontrol.DropDownItems = 50;line.
问题是基类属性DropDownItems上设置了一个不同的值（不是 50）的“默认”属性。结果，当我将控件拖到窗体上时，设计器文件会得到一条明确的mycontrol.DropDownItems = 50;行。
At first, this doesn't matter. But if later I change my inherited class to DropDownItems = 45;in the constructor, this does not affect any of the controls on any form since all those designer files still have the value 50 hard-coded in them. And the whole point was to have the value set in one place so I can deal with the customer changing his mind.
起初，这并不重要。但是，如果稍后我将继承的类更改为DropDownItems = 45;在构造函数中，这不会影响任何表单上的任何控件，因为所有这些设计器文件中的值 50 仍然是硬编码的。重点是将价值设置在一个地方，这样我就可以应对改变主意的客户。
Obviously, if I were creating my own custom property in the subclass, I could give it its own designer default attribute of whatever I wanted. But here I'm wanting to change the default values of properties in the base. Is there any way to apply Visual Studio attributes to a base class member? Or is there some other workaround to get the result I want?
显然，如果我在子类中创建我自己的自定义属性，我可以为它提供我想要的任何设计器默认属性。但是在这里我想更改基础中属性的默认值。有什么方法可以将 Visual Studio 属性应用于基类成员？或者是否有其他解决方法来获得我想要的结果？
采纳答案by Andrew Peters
In your derived class you need to either override (or shadow using new) the property in question and then re-apply the default value attribute.
在您的派生类中，您需要覆盖（或使用new隐藏）有问题的属性，然后重新应用默认值属性。
