C# LIST和STRING互相轉換

List轉字串，用逗號隔開

List list = new List();
list.Add("a");
list.Add("b");
list.Add ("c");
//MessageBox.Show(list.);
//LoadModel();
string s = string.Join(",", list.ToArray());
MessageBox.Show(s) ;

 

List list = new List();
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(string s2 = string.Join(",", b.ToArray( ));
MessageBox.Show(s1 + "rn" + s2); 

結果：1,2,,3

      a,b,,c

      a,b,,c

      a,b,c

 

不是“,”而是“， ”，後面有一個空格

string s = "1, 2, 3";
List list = new List(s.Split(new string[] { " , " }, StringSplitOptions.RemoveEmptyEntries));
foreach (string t in list)
{
    MessageBox.Show("*" + t + "*");

}

string s = "1,2,3";
List list = new List(s.Split(','));
foreach (string t in list)
{
  "*" + t + "*");
}

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