how to measure width of a string precisely?

Question

First of all, question How to measure width of character precisely? which is answered, doesn\'t really help for this case, so this isn\'t a duplicate of that.

Answer 1

You just need to eliminate extra width. You can do this by using string format:

GdipStringFormatGetGenericTypographic()

You could also use:

float doubleWidth = g.MeasureString(text+text,...).Width;
float singleWidth = g.MeasureString(text).Width;
float textWidth = doubleWidth-singleWidth;

This will allow you to work with other languages such as Japanese.

On codeproject, Pierre Anaud's solution was to use MeasureCharacterRanges, which returns a region matching exactly the bounding box of the specified string:

static public int MeasureDisplayStringWidth(Graphics graphics, string text, Font font)
{
    System.Drawing.StringFormat format  = new System.Drawing.StringFormat ();
    System.Drawing.RectangleF   rect    = new System.Drawing.RectangleF(0, 0, 1000, 1000);
    var ranges  = new System.Drawing.CharacterRange(0, text.Length);
    System.Drawing.Region[] regions = new System.Drawing.Region[1];

    format.SetMeasurableCharacterRanges (ranges);

    regions = graphics.MeasureCharacterRanges (text, font, rect, format);
    rect    = regions[0].GetBounds (graphics);

    return (int)(rect.Right + 1.0f);
}