将 helpstring 属性应用于通过 COM 接口公开的 C# 属性 [英] Getting the helpstring attribute applied to C# properties exposed via COM interfaces

问题描述

我目前正在开发一个库，该库将公开给 COM，以便在升级的旧项目中使用.我正在创建要公开的接口，它们具有 long、int 等类型的属性.使用 DescriptionAttribute，我可以获得在 .tlb 中为接口、类和方法生成的帮助字符串，但由于某种原因，它似乎不想为属性工作.无论如何要获得在 TLB 输出中为属性生成的帮助字符串吗?

I'm currently working on a library that's to be exposed to COM for use in a legacy project that's being upgraded. I'm creating interfaces that are to be exposed, and they have properties on them with long, int, etc types. Using the DescriptionAttribute, I can get helpstrings generated in the .tlb for interfaces, classes, and methods, but for some reason it doesn't seem to want to work for properties. Is there anyway to get a helpstring generated in the TLB output for properties ?

推荐答案

你必须将属性分别放在getter和setter上.像这样:

You have to put the attribute on the getter and setter individually. Like this:

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;

namespace ClassLibrary1 {
    [ComVisible(true), InterfaceType(ComInterfaceType.InterfaceIsDual)]
    public interface IFoo {
        int property {
            [Description("prop")]
            get;
            [Description("prop")]
            set;
        }
    }
}

重复描述很笨拙，但在 IDL 中也是必需的.

Repeating the description is clumsy, but also required in IDL.

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