Drawing getbounds rectangle or rectangleF?

Question

I have a List with float coordinates and I'm trying to draw a rectangle around a line previously drawn.

Graphics G = e.Graphics;    
Pen pen5 = new Pen(Color.DodgerBlue, 0.01f);
var rect2 =  new RectangleF();

GraphicsPath maliOkvir = new GraphicsPath();
maliOkvir.AddLine(((float)(odabraniSegment[0].startX)),
                   (float)(odabraniSegment[0].startY),
                   (float)(odabraniSegment[0].endX),
                   (float)(odabraniSegment[0].endY));

rect2 = maliOkvir.GetBounds();
G.DrawRectangle(pen5, rect2);

I'm getting an error on rect2 part:

G.DrawRectangles(pen5, rect2);

Cannot convert from 'System.Drawing.RectangleF' to 'System.Drawing.RectangleF[]'

How can I fix this? tried multiple variations of Rectangle and RectangleF, none works together.. the end result should look like this:

At first glance, it looks like whatever `e` is, has the method `DrawRectangles` in it - which alludes to the fact it might take an array of `RectangleF`s (`RectangleF[]`) - hence your error. Looking at the `Graphics` Class, it has a `.DrawRectangle` (singular) method: https://msdn.microsoft.com/en-us/library/sx8yykw8(v=vs.110).aspx Are you sure you're using the right method? — Geoff James, Jun 20 '16 at 23:34
`DrawRectangles` expects an array of rectangles, you probably want `DrawRectangle` (without the s on the end) — DavidG, Jun 20 '16 at 23:36
@DavidG you're right, my bad, it was a leftover from previous attempts to fix it. — Romy, Jun 20 '16 at 23:40
@DavidG Exactly the same. The `DrawRectangle` command doesn't want float values but my `rect2` can only be made to `RectangleF`, if i remove the F, new error comes up on the `GetBounds` command because it also needs `float` values. — Romy, Jun 20 '16 at 23:46

score 2 · Answer 1 · edited May 03 '22 at 06:08

2

You're using the DrawRectangles() method of System.Drawing.Graphics, which expects an array of Rectangles.

Use the singular version: DrawRectangle():

G.DrawRectangle(pen5, rect2.Left, rect2.Top, rect2.Width, rect2.Height); // Singular

MSDN gives you (a lot) of information about the Graphics class.

Hope this helps!

edited May 03 '22 at 06:08

Penguin

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answered Jun 20 '16 at 23:39

Geoff James

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A mistake on my part, it should have been DrawRectangle, I only need one, but I just need the functions to all take float values, so the thing can work :) – Romy Jun 20 '16 at 23:43
Glad to have helped @Romy! Easy mistake to make. Don't forget to mark as answer when you're done. Happy programming :) – Geoff James Jun 20 '16 at 23:50
Although the extra "s" was a mistake, the same problem still remains :/ – Romy Jun 20 '16 at 23:51
*Exactly* the same error? That's not possible. Have you tried cleaning and rebuilding your solution? – Geoff James Jun 20 '16 at 23:53
Yea weird, but DavigG suggested sticking with the array way, and that worked. :) – Romy Jun 20 '16 at 23:56
That was going to be my next suggestion of passing an array with only the `rect2` in it, like David suggested. Glad you got it working :) – Geoff James Jun 20 '16 at 23:57
Worth noting that you can pass in a `Rectangle`, but not a `RectangleF` (as is provided in the original question). For `RectangleF`, you have to pass `X`, `Y`, `Width`, and `Height` as individual arguments to [this overload of Graphics.DrawRectangle](https://learn.microsoft.com/en-us/dotnet/api/system.drawing.graphics.drawrectangle?view=dotnet-plat-ext-6.0#system-drawing-graphics-drawrectangle(system-drawing-pen-system-single-system-single-system-single-system-single)) – Wyck May 02 '22 at 17:18

score 2 · Accepted Answer · answered Jun 20 '16 at 23:39

2

The DrawRectangles method expects an array of Rectangle or RectangleF objects but you are only passing in a single item. You should either:

Switch to use the singular version of the method, i.e. DrawRectangle

Pass in an array:

G.DrawRectangles(pen5, new [] { rect2 });

answered Jun 20 '16 at 23:39

DavidG

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or 3. Pass in the float values: `g.DrawRectangle(pen5, rect2.X, rect2.Y, rect2.Width, rect2.Height);` :-) – LarsTech Jun 20 '16 at 23:57
Indeed @LarsTech, was tempted to add that one, but it's always a PITA to remember the parameter order. – DavidG Jun 20 '16 at 23:58

Drawing getbounds rectangle or rectangleF?

2 Answers2