问题描述
我有一个程序集(作为ReflectionOnly加载),我想找到该程序集中的所有名称空间,以便可以将它们转换为自动生成的源代码文件的"using"(在VB中为"Imports")语句.模板.
I've got an assembly (loaded as ReflectionOnly) and I want to find all the namespaces in this assembly so I can convert them into "using" ("Imports" in VB) statements for an auto-generated source code file template.
理想情况下,我只想限制自己使用顶级名称空间,而不是:
Ideally I'd like to restrict myself to top-level namespaces only, so instead of:
using System;
using System.Collections;
using System.Collections.Generic;
您只会得到:
using System;
我注意到System.Type类上有一个Namespace属性,但是有没有一种更好的方法来收集程序集中的Namespace,而该程序不涉及对所有类型的迭代和剔除重复的名称空间字符串呢?
I noticed there is a Namespace property on the System.Type class, but is there a better way to collect Namespaces inside an assembly that doesn't involve iterating over all types and culling duplicate namespace strings?
有很多义务,大卫
推荐答案
不,尽管LINQ使它相对容易,但没有捷径可言.例如,在C#中,原始的命名空间集"为:
No, there's no shortcut for this, although LINQ makes it relatively easy. For example, in C# the raw "set of namespaces" would be:
var namespaces = assembly.GetTypes()
.Select(t => t.Namespace)
.Distinct();
要获取顶级名称空间,您可能应该编写一个方法:
To get the top-level namespace instead you should probably write a method:
var topLevel = assembly.GetTypes()
.Select(t => GetTopLevelNamespace(t))
.Distinct();
...
static string GetTopLevelNamespace(Type t)
{
string ns = t.Namespace ?? "";
int firstDot = ns.IndexOf('.');
return firstDot == -1 ? ns : ns.Substring(0, firstDot);
}
我对为什么只需要顶层名称空间很感兴趣……这似乎是一个奇怪的约束.
I'm intrigued as to why you only need top level namespaces though... it seems an odd constraint.
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