C# 委托(delegate)创建和激活

Question

我有两个功能:

double fullFingerPrinting(string location1, string location2, int nGrams)
double AllSubstrings(string location1, string location2, int nGrams)

我想进入一个循环并依次激活每个函数，并且在每个函数之后我还想打印函数的名称，我该怎么做？

Answer 1

1. 定义您的函数通用的委托(delegate)类型。
2. 为您的职能创建委托(delegate)集合
3. 遍历集合，调用每个委托(delegate)并使用 Delegate.Method属性以获取方法名称。

示例(经过编辑以显示非静态函数委托(delegate)):

class Program
{
    delegate double CommonDelegate(string location1, string location2, int nGrams);

    static void Main(string[] args)
    {
        SomeClass foo = new SomeClass();

        var functions = new CommonDelegate[]
        {
            AllSubstrings,
            FullFingerPrinting,
            foo.OtherMethod
        };

        foreach (var function in functions)
        {
            Console.WriteLine("{0} returned {1}",
                function.Method.Name,
                function("foo", "bar", 42)
            );
        }
    }

    static double AllSubstrings(string location1, string location2, int nGrams)
    {
        // ...
        return 1.0;
    }

    static double FullFingerPrinting(string location1, string location2, int nGrams)
    {
        // ...
        return 2.0;
    }
}

class SomeClass
{
    public double OtherMethod(string location1, string location2, int nGrams)
    {
        // ...
        return 3.0;
    }
}