I have an array:
var array = ["19991229", "19801001", "19890123"]
Then, I want to show this array in a webbrowser form c# by using
string.Join("<br>", array)
How can I get the first 4 digit using substring? I want it print:
1999
1980
1989
I can't use string.Join("<br>", array).substring(0,4)
You can do it with Linq:
var array = new [] { "19991229", "19801001", "19890123" };
var joinedString = string.Join(
"<br>",
array.Select(s => s.Substring(0, 4)));
It looks like those strings are actually dates, so here's some extra code to convert them all to DateTime objects:
var dates = array.Select(s => new DateTime(
int.Parse(s.Substring(0, 4)),
int.Parse(s.Substring(4, 2)),
int.Parse(s.Substring(6, 2)))
);
var stArray = new string[] { "19991229", "19801001", "19890123" };
string stringValue = String.Join("<br>", stArray.Select(x => x.Substring(0,4)));