TextBox remove leading and tailing spaces and empty lines better way

Question

I have text box in which user may input some text. Currently I'm removing all spaces and empty lines using this code:

private void RemoveSpacesAndEmptyLines()
{
    textBox.Lines = textBox.Lines.Where(val => val.Trim().Length != 0).ToArray();
    textBox.Lines = textBox.Lines.Select(c => c.Trim()).ToArray();
}

But is it possible to do only one call?
I need to have only lines that have something except spaces in it and also remove all spaces.

Answer 1

But is it possible to do only one call?

Sure, because you can chain the Where and the Select :

textBox.Lines
    .Where(val => val.Trim().Length != 0)
    .Select(c => c.Trim()).ToArray();

Answer 2

textBox.Lines = textBox.Lines
    .Select(l => l.Trim())
    .Where(l => !string.IsNullOrEmpty(l))
    .ToArray();

Answer 3

function trim (el) {
    el.value = el.value.
       replace (/(^\s*)|(\s*$)/, ""). // removes leading and trailing spaces
       replace (/[ ]{2,}/gi," ").       // replaces multiple spaces with one space 
       replace (/\n +/,"\n");           // Removes spaces after newlines
    return;
}​


onkeypress="return trim(this)"