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c#winformsrichtextboxmeasure

Measure the amount of characters a RichTextBox can have on a line

Given a C# Winforms RichTextBox I would like to know how many characters I can fit on a line. I know what my Font (monospaced characters) and FontSize are.

Cheers, Sean

Solution

  • I noticed that measuring one character adds some extra space which inadequately represents the real width of one character. 

    private int CalculateMaxDescriptionLineLength()
{
    Graphics g = _tb.CreateGraphics();
    float twoCharW = g.MeasureString("aa", _tb.Font).Width;
    float oneCharW = g.MeasureString("a", _tb.Font).Width;
    return (int)((float)_tb.Width / (twoCharW - oneCharW));
}

    Thanks Sergey for putting me on the right path.