Find out when a label goes to the next line in Windows Forms and C#

Question

I have a label1 with Size(300, 100). The text comes from the server during the runtime and it varies, so I don't have the fixed text, but it fits in my label in 2-3 lines.

I have to find out WHEN IT STARTS A NEW LINE so I can add something to the beginning of each line.

I mean if the text is:

"aaaaaaaaaaaaaa

bbbbbbbbbbbbbb

ccccccccccc"

I have to add some character to each line and get something like this:

"aaaaaaaaaaaaaa

$bbbbbbbbbbbbbb

$ccccccccccc"

So far I've tried to play with TextRenderer class, but I think my solution is weird.

Any ideas?

It's not necessary, but sure it should look like label (I mean text only with no other elements). What do you suggest? — GugaMelkadze, Oct 16 '14 at 11:42
What defines the new line? Is there a `\n` character or similar in the string? — DonBoitnott, Oct 16 '14 at 11:43
@Vajura label does not support multiline and changing the size is not a solution, bigger label will have another line as well and the problem will not be solved. — GugaMelkadze, Oct 16 '14 at 11:53
@GugaMelkadze yes it does support it you just need to add \n in it and make it big enough so that it doesnt cut of the text — Vajura, Oct 16 '14 at 11:58
You are not going to "detect" this from an unknown string at runtime. You will have to measure the string, make the breaks, and render it yourself if you expect to know precisely where a line break occurs. — DonBoitnott, Oct 16 '14 at 12:08
Related: *[Word wrap for a label in Windows Forms](http://stackoverflow.com/questions/1204804)* — Peter Mortensen, May 12 '17 at 12:26

score 1 · Answer 1 · answered Oct 16 '14 at 13:28

I'm definetly sure there's a new line '\n' character in your string, it won't be visible in the label but it is there. The only reason the label can display it in different lines it because there is a new line character.

aaaaaaaaaaaaaa

bbbbbbbbbbbbbb

ccccccccccc

Just try the following:

yourLabel.Text = yourString.Replace("\n", "\n$");

//Hope it helps

score 1 · Accepted Answer · answered Oct 16 '14 at 13:30

One option would be to use a TextBox (or even RichTextBox), you can change the boarder style of this to None and the background colour so that it looks more like a label. If you use a TextBox set the Multiline property to true.

Then when you get your blob you could do something like this.

(please note this is very rough hacky type code, but it will give you a potential picture).

// Imagining you got your blob of data, spaces and all, in one hit.  
string blob = myWayOfGettingData;
textBox1.Text = blob;
int lineIndex = 0;
string[] allLines = new string[textBox1.Lines.Count()];
allLines = textBox1.Lines;
foreach (string line in textBox1.Lines)
{
    if (!string.IsNullOrEmpty(line))
    {
         allLines[lineIndex] = "$" + allLines[lineIndex];       
     }
     lineIndex++;
 }
 textBox1.Lines = allLines;

In the example I used I had a text file which contained your sample data, done a StreamReader ReadToEnd and went on from there.

Find out when a label goes to the next line in Windows Forms and C#

2 Answers2