如何使[DebuggerDisplay]对于继承的类或至少与集合的工作？ [英] How to make [DebuggerDisplay] respect inherited classes or at least work with collections?

问题描述

我有这从列表与LT继承的类; MagicBean> 。它运作良好，并预期在各方面除了一：当我加入 [DebuggerDisplay] 属性。即使看着列表中包含了其作为 [DebuggerDisplay（COUNT = {计数}）] ，如果我这么多的复制和粘贴到我的，我失去的能力直接在所有MagicBeans我有看不钻入基地 - > private成员同时调试。

I've got a class which inherits from a List<MagicBean>. It works well and as expected in all respects except one: when I add the [DebuggerDisplay] attribute. Even though looking at List has its as [DebuggerDisplay("Count = {Count}")], if I so much as copy and paste that onto mine, I lose the ability to look directly at all of the MagicBeans I have without drilling into base->private members while debugging.

我如何获得两全其美？ IE浏览器：在值列自定义值，和Visual Studio不要向我隐瞒我的魔豆

How do I get the best of both worlds? IE: Custom value in the value column, and Visual Studio not hiding my magic beans from me?

推荐答案

您可以得到的效果您需要使用 DebuggerTypeProxy 属性。你需要创建一个类，使您的继承列表的调试可视化：

You can get the effect you need by using the DebuggerTypeProxy attribute. You need to create a class to make a debug "visualisation" of your inherited list:

internal sealed class MagicBeanListDebugView
{
    private List<MagicBean> list;

    public MagicBeanListDebugView(List<MagicBean> list)
    {
        this.list = list;
    }

    [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
    public MagicBean[] Items{get {return list.ToArray();}}
}

然后，您可以声明这个类进行调试器显示类，用<$ C $一起使用C> DebuggerDisplay 属性：

You can then declare this class to be used by the debugger for displaying your class, along with the DebuggerDisplay attribute:

[DebuggerDisplay("Count = {Count}")]
[DebuggerTypeProxy(typeof(MagicBeanListDebugView))]
public class MagicBeanList : List<MagicBean>
{}

这会给你计数= 3的消息，当您将鼠标悬停在在Visual Studio中的继承列表的一个实例，并在列表中，当您展开根节点，而不必深入到基本属性的项目的看法。

This will give you the "Count = 3" message when you hover over an instance of your inherited list in Visual Studio, and a view of the items in the list when you expand the root node, without having to drill down into the base properties.

使用的ToString（）来具体得到调试输出是不是一个好办法，当然，除非你已经覆盖的ToString（）在其他代码中使用，在这种情况下，你可以使用它。

Using ToString() to specifically get debug output is not a good approach, unless of course you are already overriding ToString() for use in your code elsewhere, in which case you can make use of it.

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