好的,作为对评论的回应,这里有一个返回列表的版本。

public List<TLDRule> MatchWildcards(IEnumerable<TLDRule> rules,
                                    string checkAgainst)
{
    List<TLDRule> ret = new List<TLDRule>();
    foreach (TLDRule rule in rules)
    {
        if (rule.Name.Equals(checkAgainst, 
                             StringComparison.InvariantCultureIgnoreCase)
            && rule.Type == TLDRule.RuleType.Wildcard)
        {
            ret.Add(rule);
        }
    }
    return ret;
}

Then:

List<TLDRule> wildcardresults = MatchWildcards(
    TLDRulesCache.Instance.TLDRuleList, checkAgainst);

但是,如果你要转换很多代码(如果你真的 有 要转换它,请参见下面)您应该真正了解有关LINQ的更多信息。最终你肯定会用到它,如果你理解它是如何工作的,你将处于一个更好的位置来计算如何进行转换。最新的C书涵盖LINQ;如果你有我自己的书(C深入),那么第8-11章将涵盖LINQ to Objects需要知道的一切。

如果你能使用VS2008,但是 目标 .NET 2.0将使用 LINQBridge 这是对.NET 2.0的linq to对象的重新实现…现在 open source :)

多亏了乔恩·斯基特,这真的对我有帮助。它工作得很好,所有的单元测试都通过了。

在这里,我想与任何想在.NET 2.0中使用域名解析程序的人分享答案。

1更改此代码(域名.cs)

            //  Try to match an exception rule:
            var exceptionresults = from test in TLDRulesCache.Instance.TLDRuleList
                                   where
                                     test.Name.Equals(checkAgainst, StringComparison.InvariantCultureIgnoreCase)
                                     &&
                                     test.Type == TLDRule.RuleType.Exception
                                   select
                                     test;

            //  Try to match an wildcard rule:
            var wildcardresults = from test in TLDRulesCache.Instance.TLDRuleList
                                  where
                                    test.Name.Equals(checkAgainst, StringComparison.InvariantCultureIgnoreCase)
                                    &&
                                    test.Type == TLDRule.RuleType.Wildcard
                                  select
                                    test;

            //  Try to match a normal rule:
            var normalresults = from test in TLDRulesCache.Instance.TLDRuleList
                                where
                                  test.Name.Equals(checkAgainst, StringComparison.InvariantCultureIgnoreCase)
                                  &&
                                  test.Type == TLDRule.RuleType.Normal
                                select
                                  test;

进入这个:

List<TLDRule> exceptionresults = MatchRule(TLDRulesCache.Instance.TLDRuleList, checkAgainst, TLDRule.RuleType.Exception);
List<TLDRule> wildcardresults = MatchRule(TLDRulesCache.Instance.TLDRuleList, checkAgainst, TLDRule.RuleType.Wildcard);
List<TLDRule> normalresults = MatchRule(TLDRulesCache.Instance.TLDRuleList, checkAgainst, TLDRule.RuleType.Normal);

    private static List<TLDRule> MatchRule(List<TLDRule> rules, string checkAgainst, TLDRule.RuleType ruleType)
    {
        List<TLDRule> matchedResult = new List<TLDRule>();
        foreach (TLDRule rule in rules)
        {
            if (rule.Name.Equals(checkAgainst, StringComparison.InvariantCultureIgnoreCase)
                && rule.Type == ruleType)
            {
                matchedResult.Add(rule);
            }
        }
        return matchedResult;
    }

2改变这一点:

        //  Sort our matches list (longest rule wins, according to :
        var results = from match in ruleMatches
                      orderby match.Name.Length descending
                      select match;

        //  Take the top result (our primary match):
        TLDRule primaryMatch = results.Take(1).SingleOrDefault();

在这个问题上

        TLDRule primaryMatch = null;
        if (ruleMatches.Count > 0)
        {
            // match2 CompareTo match1 (reverse order) to make the descending
            ruleMatches.Sort(delegate(TLDRule match1, TLDRule match2) { return match2.Name.Length.CompareTo(match1.Name.Length); });
            primaryMatch = ruleMatches[0];
        }

3更改此项(tldrulescache.cs)

            IEnumerable<TLDRule> lstTLDRules = from ruleString in lstTLDRuleStrings
                                               where
                                               !ruleString.StartsWith("//", StringComparison.InvariantCultureIgnoreCase)
                                               &&
                                               !(ruleString.Trim().Length == 0)
                                               select new TLDRule(ruleString);

在这个问题上

List<TLDRule> lstTLDRules = ListTLDRule(lstTLDRuleStrings);

    private static List<TLDRule> ListTLDRule(List<string> lstTLDRuleStrings)
    {
        List<TLDRule> lstTLDRule = new List<TLDRule>();
        foreach (string ruleString in lstTLDRuleStrings)
        {
            if (!ruleString.StartsWith("//", StringComparison.InvariantCultureIgnoreCase)
                &&
                !(ruleString.Trim().Length == 0))
            {
                lstTLDRule.Add(new TLDRule(ruleString));
            }
        }
        return lstTLDRule;
    }

还有一些是小事情,比如:

List<string> lstDomainParts = domainString.Split('.').ToList<string>();

更改为:

List<string> lstDomainParts = new List<string>(domainString.Split('.'));

并删除.tolist()中的

“var exceptionresults”将使用exceptionresults.to list()获取列表。由于“var exceptionresults”更改为“list exceptionresults”.to list()应被删除。

卡勒梅林