我试图从.NET程序集返回部门的集合是由ASP通过COM互操作所消耗。使用.NET我只想返回一个泛型集合，例如： 名单，其中，部＆GT; ，但似乎泛型不与COM互操作工作。那么，什么是我的选择？

I am attempting to return a collection of departments from a .NET assembly to be consumed by ASP via COM Interop. Using .NET I would just return a generic collection, e.g. List<Department>, but it seems that generics don't work well with COM Interop. So, what are my options?

我想这两个遍历列表，并可以通过索引访问的项目。我应该继承名单，其中，部＆GT; ，实施的IList ，的IList＆LT;部＆GT; 或其它接口，或者是有没有更好的办法？理想情况下我会preFER不具有实现自定义集合每个类型列表中，我需要。此外，将列表[指数] 甚至与COM互操作工作？

I would like to both iterate over the list and be able to access an item by index. Should I inherit from List<Department>, implement an IList, IList<Department> or another interface, or is there a better way? Ideally I would prefer not to have to implement a custom collection for every type of list I need. Also, will List[index] even work with COM Interop?

谢谢， 迈克

public class Department {
    public string Code { get; private set; }
    public string Name { get; private set; }
    // ...
}

public class MyLibrary {
    public List<Department> GetDepartments() {
        // return a list of Departments from the database
    }
}

示例ASP code：

<%
Function PrintDepartments(departments)
    Dim department
    For Each department In departments
        Response.Write(department.Code & ": " & department.Name & "<br />")
    Next
End Function

Dim myLibrary, departments
Set myLibrary = Server.CreateObject("MyAssembly.MyLibrary")
Set departments = myLibrary.GetDepartments()
%>
<h1>Departments</h1>
<% Call PrintDepartments(departments) %>
<h1>The third department</h1>
<%= departments(2).Name %>

相关问题：

Related questions:

推荐答案

在一些更多的研究，试验和错误，我想我找到了一个解决方案，通过使用 System.Collections.ArrayList 。然而，这并不与由索引得到一个值工作。要做到这一点，我创建了一个新的类 ComArrayList ，它继承自的ArrayList ，并增加了新的方法 GetByIndex 和 SetByIndex 。

After some more research and trial-and-error, I think I found a solution by using System.Collections.ArrayList. However, this does not work with getting a value by index. To do so, I created a new class ComArrayList that inherits from ArrayList and adds new methods GetByIndex and SetByIndex.

public class ComArrayList : System.Collections.ArrayList {
    public virtual object GetByIndex(int index) {
        return base[index];
    }

    public virtual void SetByIndex(int index, object value) {
        base[index] = value;
    }
}

更新.NET组件MyLibrary.GetDepartments：

public ComArrayList GetDepartments() {
    // return a list of Departments from the database
}

更新ASP：

<h1>The third department</h1>
<%= departments.GetByIndex(2).Name %>