如何使用此模式将此 sql 语句转换为 linq

Question

如何将此 sql 语句转换为 linq。

declare @S nvarchar(100) = 'www.abc.com/a/b/c/d/e/f/g/h/i'

while PATINDEX('%[/]%' , @S) > 0 BEGIN
    SET @S = LEFT (@S,LEN(@S) - PATINDEX('%[/]%' , REVERSE(@S)))
SELECT @S
END

Answer 1

应该这样做：

StringBuilder sb = new StringBuilder();
string url = "www.abc.com/a/b/c/d/e/f/g/h/i";

var q = url.Split('/').Select(s => sb.Append((sb.Length > 0 ? "/" : "") + s).ToString());

foreach(string output in q.Reverse())
    Console.WriteLine(output);

输出：

www.abc.com/a/b/c/d/e/f/g/h/i
www.abc.com/a/b/c/d/e/f/g/h
www.abc.com/a/b/c/d/e/f/g
www.abc.com/a/b/c/d/e/f
www.abc.com/a/b/c/d/e
www.abc.com/a/b/c/d
www.abc.com/a/b/c
www.abc.com/a/b
www.abc.com/a
www.abc.com