在列表中查找匹配项的最简洁方法 [英] Cleanest Way to Find a Match In a List

问题描述

在列表中查找内容的最佳方法是什么?我知道 LINQ 有一些不错的技巧，但让我们也获得有关 C# 2.0 的建议.让我们为这个常见的代码模式获得最好的重构.

What is the best way to find something in a list? I know LINQ has some nice tricks, but let's also get suggestions for C# 2.0. Lets get the best refactorings for this common code pattern.

目前我使用这样的代码:

Currently I use code like this:

// mObjList is a List<MyObject>
MyObject match = null;
foreach (MyObject mo in mObjList)
{
    if (Criteria(mo))
    {
        match = mo;
        break;
    }
}

或

// mObjList is a List<MyObject>
bool foundIt = false;
foreach (MyObject mo in mObjList)
{
    if (Criteria(mo))
    {
        foundIt = true;
        break;
    }
}

推荐答案

@Konrad:那你怎么用它?假设我想将 mo.ID 与 magicNumber 匹配.

@ Konrad: So how do you use it? Let's say I want to match mo.ID to magicNumber.

在 C# 2.0 中你会这样写:

In C# 2.0 you'd write:

result = mObjList.Find(delegate(int x) { return x.ID == magicNumber; });

3.0 知道 lambdas:

3.0 knows lambdas:

result = mObjList.Find(x => x.ID == magicNumber);

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