Creating a string from a generic list

Question

I'm trying to create a string from the values in a list;what i am trying to achieve is the sql syntax wich is used in an update query:

UPDATE TABLE SET COLUMN1 =X WHERE COLUMN2 IN ('A','B','C')

(A,B,C are items in my list.)How can i achieve this? tried:

            string commaSeparatedList = _list.Aggregate((a, x) => a + ", " + x);

but it creates me the list without the apostrophes...

Answer 1

您也可以改用String.Join方法 ：

string commaSeparatedList = string.Join(",", _list.Select(s => "'" + s + "'"));

Answer 2

If your code gives you exactly what you want except for the apostrophes, just stick a

.Select(s => "'" + s + "'")

between _list .and .Aggregate...

Answer 3

string commaSeparatedList = "'"+_list.Aggregate((a, x) =>  a + "','" + x )+"'";