不区分大小进行字符串比较 - 火冰·瓶 - 博客园

所述String.Equals（字符串，StringComparison）方法，可以指定一个StringComparison的值 StringComparison.OrdinalIgnoreCase 为不区分大小写的比较。如果为StringComparison参数指定StringComparison.OrdinalIgnoreCase值，则还有一个静态 String.Compare（String，String，StringComparison）方法将执行不区分大小写的序数比较。以下示例代码：

string root = @"C:\users"; string root2 = @"C:\Users"; bool result = root.Equals(root2, StringComparison.OrdinalIgnoreCase); bool areEqual = String.Equals(root, root2, StringComparison.OrdinalIgnoreCase); int comparison = String.Compare(root, root2, comparisonType: StringComparison.OrdinalIgnoreCase); Console.WriteLine($"Ordinal ignore case: <{root}> and <{root2}> are {(result ? "equal." : "not equal.")}"); Console.WriteLine($"Ordinal static ignore case: <{root}> and <{root2}> are {(areEqual ? "equal." : "not equal.")}"); if (comparison < 0) Console.WriteLine($"<{root}> is less than <{root2}>"); else if (comparison > 0) Console.WriteLine($"<{root}> is greater than <{root2}>"); else Console.WriteLine($"<{root}> and <{root2}> are equivalent in order");