CODEWITHSUNDEEP
c#textboxforeachcharacter
SharkRetriever
SharkRetriever

Reputation: 214

Adding new characters to beginning and end of each line in textbox

I have a textbox with multiline enabled, and want to add a string at the beginning and end of each line, so every line would be changed to 

a + line + b

Now I know it has to do with a foreach loop, but don't know how to write it out.

Upvotes: 1

Views: 4880

Answers (4)

Abdelhalim FELLAGUE CHEBRA
Abdelhalim FELLAGUE CHEBRA

Reputation: 687

Here is what i use to add the characters a and b to the beginning and the end to a string that contains a bunch of lines :

     public string Script;
     string[] lines = Script.Split(new[] { '\r', '\n' });
                    for (int i = 0; i < lines.Length; i++)
                    {
                        lines[i] = a + lines[i] + b;
                        if (!lines[i].Equals("\"\"+"))
                        {
                            Console.WriteLine(lines[i]);
                            Result += lines[i]+"\n";
                        }
                    }

Upvotes: 0

Guffa
Guffa

Reputation: 700422

You can use a replace on the entire text:

text = a + text.Replace(Environment.NewLine, b + Environment.NewLine + a) + b;

Upvotes: 2

Igby Largeman
Igby Largeman

Reputation: 16747

Since you mentioned foreach, here's another way.

var newLines = new List<string>(textBox1.Lines.Length);

foreach (string line in textBox1.Lines)
   newLines.Add(a + line + b);

textBox1.Lines = newLines.ToArray();

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1501043

Well, the Lines property is probably the one you want. Three options:

string[] lines = textBox.Lines;
for (int i = 0; i < lines.Length; i++)
{
     lines[i] = a + lines[i] + b;
}
textBox.Lines = lines;

Or:

textBox.Lines = Array.ConvertAll(textBox.Lines, line => a + line + b);

Or:

textBox.Lines = textBox.Lines
                       .Select(line => a + line + b)
                       .ToArray();

Upvotes: 6

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