How do I get the last four characters from a string in C#?

Question

Suppose I have a string:

\"34234234d124\"

I want to get the last four characters of this string which is \"d124\". I can use <

Answer 1

assuming you wanted the strings in between a string which is located 10 characters from the last character and you need only 3 characters.

Let's say StreamSelected = "rtsp://72.142.0.230:80/SMIL-CHAN-273/4CIF-273.stream"

In the above, I need to extract the "273" that I will use in database query

        //find the length of the string            
        int streamLen=StreamSelected.Length;

        //now remove all characters except the last 10 characters
        string streamLessTen = StreamSelected.Remove(0,(streamLen - 10));   

        //extract the 3 characters using substring starting from index 0
        //show Result is a TextBox (txtStreamSubs) with 
        txtStreamSubs.Text = streamLessTen.Substring(0, 3);

Answer 2

All you have to do is..

String result = mystring.Substring(mystring.Length - 4);

Answer 3

mystring.Substring(Math.Max(0, mystring.Length - 4)); //how many lines is this?

If you're positive the length of your string is at least 4, then it's even shorter:

mystring.Substring(mystring.Length - 4);

Answer 4

Ok, so I see this is an old post, but why are we rewriting code that is already provided in the framework?

I would suggest that you add a reference to the framework DLL "Microsoft.VisualBasic"

using Microsoft.VisualBasic;
//...

string value = Strings.Right("34234234d124", 4);

Answer 5

Here is another alternative that shouldn't perform too badly (because of deferred execution):

new string(mystring.Reverse().Take(4).Reverse().ToArray());

Although an extension method for the purpose mystring.Last(4) is clearly the cleanest solution, albeit a bit more work.

Answer 6

string var = "12345678";

if (var.Length >= 4)
{
    var = var.substring(var.Length - 4, 4)
}

// result = "5678"