How can I trim a text pasted on a multiline textbox?

[learningtoday]

For example I pasted a text this text:

L1 line one blah blah blah blah
L2 another line 2 blah blah blah
L3 and another line three blah
L4 a last line blah blah blah


How can it be possible to trim it from a specified length up to the end of each line resulting the above example to be, say for example specifying a length of 3 and the result would be removing any extra white spaces beyond:

L1 lin
L2 ano
L3 and
L4 a <--- (no extra characters after 'a')

Please help, I'm just a beginner in programming, if you don't want to give the exact solution please provide me with helpful hints that I can study. Thanks!

[GaryTexmo]

Your multiline string is actually a single string, but is broken up with newline characters. This will either be '\n' or sometimes '\n\r' (possibly '\r\n'). The Environment class has a newline property which contains this information. Still, it's best to visual inspect your string to see what the separator characters are.

Anyway, you can split your string using the String.Split method on the Environment.NewLine character. This will break your string up into lines. Then you can loop over each line in the resulting array and trim it to the desired length. You can then rebuild the merged string if you like.

MSDN has information on using the String.Split method. Please let me know how this turns out for you.

[learningtoday]

Thanks Gary, Yes I will surely let you know, but I think it would take me longer time before my next reply, I'm still going to figure out how it works and how I can apply it, I'm just self studying alone at home, so an easy help is not possible.. Thanks Gary! I'm going to read it on MSDN regarding the String.Split method.