Question

i have a label control in windows form. i want to display full text in the label . condition is like this:

• if text length exceeds more that 32 character than it will come in the new line.

• if possible split by full word, without hyphen(-).

  So far i have reach till below code:

     private void Form1_Load(object sender, EventArgs e)
      {
          string strtext = "This is a very long text. this will come in one line.This is a very long text. this will come in one line.";
          if (strtext.Length > 32)
          {              
              IEnumerable<string> strEnum = Split(strtext, 32);
              label1.Text =string.Join("-\n", strEnum);
          }         
      }
      static IEnumerable<string> Split(string str, int chunkSize)
      {
          return Enumerable.Range(0, str.Length / chunkSize)
              .Select(i => str.Substring(i * chunkSize, chunkSize));
      }
  

but issue is that the last line is not displaying entirely because its splitting by 32 character.

Is there another way to achieve this?

Answer 1

I don’t know if you will accept an answer that doesn’t use linq, but this is simple:

string SplitOnWholeWord(string toSplit, int maxLineLength)
{
    StringBuilder sb = new StringBuilder();
    string[] parts = toSplit.Split();
    string line = string.Empty;
    foreach(string s in parts)
    {
        if(s.Length > 32)
        {
            string p = s;
            while(p.Length > 32)
            {
                int addedChars = 32 - line.Length;
                line = string.Join(" ", line, p.Substring(0, addedChars));
                sb.AppendLine(line);
                p = p.Substring(addedChars);
                line = string.Empty;
            }
            line = p;
        }
        else
        {
            if(line.Length + s.Length > maxLineLength)
            {
                sb.AppendLine(line);
                line = string.Empty;
            }
            line = (line.Length > 0 ? string.Join(" ", line, s) : s);
        }
    }
    sb.Append(line.Trim());
    return sb.ToString();
}

Call with

string result = SplitOnWholeWord(strtext, 32);

It is possible to transform this in an extension method easily:

Put the code above in a separate file and create a static class

public static class StringExtensions
{
     public static string SplitOnWholeWord(this string toSplit, int maxLineLength)
     {
          // same code as above.....
     }

}

and call it in this way:

string result = strtext.SplitOnWholeWord(32);