如何用LINQ使一些if(或表达式)更短

本文关键字：表达式 更短 if 何用 LINQ | 更新日期: 2023-09-27 18:17:44

我有一些像这样的c#行:

if (justification.Contains("CT_") ||
justification.Contains("CTPD_") ||
justification.Contains("PACS_") ||
justification.Contains("NMG_") ||
justification.Contains("TFS_ID") ||
justification.Contains("AX_") ||
justification.Contains("MR_") ||
justification.Contains("FALSE_POSITIVE") ||                             
justification.Contains("EXPLICIT_ARCH_TEAM_DESIGN_DECISON") ||
justification.Contains("EXPLICIT_ARCH_TEAM_DESIGN_DECISION"))
{
    // justification is ok.
}else
{
    reporter.Report(syntaxNode.GetLocation(), syntaxNode,
    Resources.SpecifySuppressMessageJustificationTitle);
}

我的想法是把所有这些字符串到一个数组和在我的IF表达式我只是迭代我的数组(或枚举一个IEnumerable)。但是我该怎么做呢?

我从这里开始:

IEnumerable<string> someValues = new List<string>() { "CT_", "CTPD","PACS_", "NMG_", "AX_" };
if (justification == BUT HOW I HAVE TO RUN THROUGH MY someValuesand get the
stringValues?)
{
}

如何用LINQ使一些if(或表达式)更短

你可以这样做，如果你需要不区分大小写的包含检查，你可以通过使用justification.ToUpper()获得大写，因为你已经有了大写的值列表

var someValues = new List<string>() { "CT_", "CTPD","PACS_", "NMG_", "AX_" };
if(someValues.Any(x=>justification.Contains(x))
{
   // justification is ok.
}else
{
   // not matching
}

var someValues = new[] { "CT_", "CTPD","PACS_", "NMG_", "AX_" };
if (someValues.Any(x => justification.Contains(x))
{
    // justification is ok.
}

如果justification是IEnumerable(或List)，您可以使用Intersect

Intercept生成一个集合，包含两个列表中都可以找到的项。

IEnumerable<string> someValues = new List<string>() { "CTPD","PACS_",  "NMG_", "AX_"};
if (justification.Intersect(someValues).Any())
{
   // Atleast one match was found.
}

如果对齐变量是字符串，可以使用Any()

if(someValues.Any(x => justification.Contains(x))
{
    // A match was found.
}
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