C# List和String互相轉換

List轉字元串，用逗号隔開

List<string> list = new List<string>();

list.Add("a");

list.Add("b");

list.Add("c");

//MessageBox.Show(list.);

//LoadModel();

string s = string.Join(",", list.ToArray());

MessageBox.Show(s);

List<test> list = new List<test>();

list.Add(new test("1", "a"));

list.Add(new test("2", "b"));

list.Add(new test("", ""));

list.Add(new test("3", "c"));

var a = from o in list select o.test1;

var b = from o in list select o.test2;

string s1 = string.Join(",", a.ToArray());

string s2 = string.Join(",", b.ToArray());

MessageBox.Show(s1 + "\r\n" + s2); 

結果：1,2,,3

      a,b,,c

字元串轉List

這裡s的分隔符不是“,”而是“， ”，後面有一個空格

string s = "1, 2, 3";

List<string> list = new List<string>(s.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries));

foreach (string t in list)

{

    MessageBox.Show("*" + t + "*");

}

這裡s的分隔符是“,”

string s = "1,2,3";

List<string> list = new List<string>(s.Split(','));