有没有办法在foreach循环中遍历命名空间中的所有类型？

Question

我有一个函数接收类型并返回true或false.我需要找出某个命名空间中的所有类型,该函数将为它们返回true.谢谢.

Answer 1

这是一个获取命名空间中所有类的函数:

using System.Reflection;
using System.Collections.Generic;

/// <summary>
/// Method to populate a list with all the class
/// in the namespace provided by the user
/// </summary>
/// <param name="nameSpace">The namespace the user wants searched</param>
/// <returns></returns>
static List<string> GetAllClasses(string nameSpace)
{
    //create an Assembly and use its GetExecutingAssembly Method
    //http://msdn2.microsoft.com/en-us/library/system.reflection.assembly.getexecutingassembly.aspx
    Assembly asm = Assembly.GetExecutingAssembly();
    //create a list for the namespaces
    List<string> namespaceList = new List<string>();
    //create a list that will hold all the classes
    //the suplied namespace is executing
    List<string> returnList = new List<string>();
    //loop through all the "Types" in the Assembly using
    //the GetType method:
    //http://msdn2.microsoft.com/en-us/library/system.reflection.assembly.gettypes.aspx
    foreach (Type type in asm.GetTypes())
    {
        if (type.Namespace == nameSpace)
            namespaceList.Add(type.Name);
    }

    foreach (String className in namespaceList)
        returnList.Add(className);

    return returnList;
}

[更新]

这是一个更紧凑的方法,但这需要.Net 3.5(从这里):

public static IEnumerable<Type> GetTypesFromNamespace(Assembly assembly, 
                                               String desiredNamepace)
{
    return assembly.GetTypes()
                   .Where(type => type.Namespace == desiredNamespace);
}