How to set 'RowLength' for a textbox in Silverlight?

Question

Hi,

is it possible to set number of characters per row for a multiline (AcceptsReturn="True") textbox in Silverlight? Like Cols attribute of Textarea in HTML.

Answer 1

Not really. Normally you just set the height and width to whatever you want. Is there a particular reason why you want a certain number of characters on each line?

[EDIT]
I found some code here that splits a string into equal chunks:
http://stackoverflow.com/questions/1450774/c-split-a-string-into-equal-chunks-each-of-size-4
Using that, I came up with the following. It works ok but needs some tweaking.

private void TextBox_KeyUp(object sender, KeyEventArgs e)
{
    var text = (sender as TextBox).Text.Replace(Environment.NewLine, "").Chunk(8).ToList();

    (sender as TextBox).Text = String.Join(Environment.NewLine, text.ToArray());
    (sender as TextBox).SelectionStart = (sender as TextBox).Text.Length;
}

And the extension method:

public static class Extensions
{
    public static IEnumerable<string> Chunk(this string str, int chunkSize)
    {
        for (int i = 0; i < str.Length; i += chunkSize)
            yield return str.Substring(i, Math.Min(chunkSize, str.Length - i));
    }
}