Hi All, I'm am having trouble resizing a multipage TIFF file. The TIFF is 640x480 and I am trying to resize ALL frames to 320x280. If I resize it by creating a new bitmap at the target size and resave, it loses the pages. If I loop through all the pages and resize each page into new bit...more >>

I'm trying to get my head around working with the Matrix class. I'm doing something manually that I'd prefer to do with a transformation. Basically I have shape objects that are responsible for drawing themselves on a surface. The shapes all store their Positions. I calculate an offset facto...more >>

Hi, is there a way to set the output quality of a saved JPEG graphics? I need to save some graphs (using Bitmap.Save()) into files and would like to have more than one file format available. I know PNG is probably the best format for a raster line graphics, but some people prefer JPEG or BMP to...more >>

I have a GIF which its dimensions is 200x300 pixels and it is animating fine. But after i resize it to smaller dimensions (133x200 pixels), it doesn't animate anymore. Why is it not animating ? Thanks....more >>

Hi, I draw a BitmapA, a mostly white picture with some black lines (drawn from an array) I call BitmapA.MakeTransparent(Color.White) I use Graphics.DrawImage (...) to draw the picture to screen When I have to refresh the screen again (the array has changed) I want to draw to the same b...more >>

I have an app that runs in the system tray. It takes an icon from the programs resources then draws two rectangles on it and numbers... the wierd thing is its crashing... here is the exception I am getting System.ArgumentException: Parameter is not valid. at System.Drawing.Biutmap..cto...more >>

When the control is disabled, the text back ground color fade to gray, How to change the color? From http://www.developmentnow.com/g/20_2004_10_0_0_0/dotnet-framework-drawing.htm Posted via DevelopmentNow.com Groups http://www.developmentnow.com...more >>

One reads an image from a file that has, maybe, a resolution of 300 PPI. And another image that is 600ppi. And Draw them it onto a PictureBox.Image that has a 96ppi resolution. How does one go about maintaining the correct size (inches) (I don't know the correct term to describe this kind of ...more >>

Hi, I'm creating a asp.net web application using vb.net. I have 7 images from stream and I put it inside a array. The problem now is how can I put those images inside my image button web server control? I tried using response.outputstream it works but it overwrite my layout only one image is b...more >>

Hi, I have added a textbox (richtextbox) to a form. I keep on appending text to this textbox. How can I cause this textbox to automatically scroll down to the text that has been added recently ? TIA, Darth ...more >>

Hi, I am rendering a reporting service report and using the PrintDocument class to print the resulting byte array. I set the defaultpagesettings to the printer defaultpagesettings (this is all done in asn asp.net application). When printing on our development SBS server this prints corre...more >>

Hi, I can't seem to elimate flicker. I'm drawing to a panel via its OnPaint. I've tried setting the form's doublebuffer to true, to no avail, so I tried using ControlStyles.OptimizedDoubleBuffer, still no good. Then I tried using good old BufferedGraphicsContext in the panel OnPaint, whic...more >>

When I draw something in windows form with gdi+ and minimize it. Object that I drawed them before the minimizing was lost from window. How can I solve this problem?? ...more >>

What is the perfect way to draw a graphic like Performance graphic of Windows Task Manager. I tried it with gdi+ but it wasnt beautiful like task manager's. Which metod or namespace I have to use? ...more >>

I create a 32bpp rgb bitmap in my code to write some text to it then convert it to a monochrome. My original bitmap is 1728 W by 2261 High with a resolution set of X= 204 and Y = 196. After converting it to a monochrome bitmap it has the same pixels height width and resolutions. I then save ...more >>

May be I missing something but how do I create a Bitmap object specifying size in millimeters? Bitmap constructor deals only with pixels. How about millimeters? ...more >>

I have been working on a card game (called Uno) for past few days. Language used : C# 2.0 When I start a new game, a dialog window pops up asking the name of the player. I enter the name, and then cards are distributed to the computer and player. Then I set a flag true, to signal that the clie...more >>

Apparently you cannot write directly to a monochrome bitmap so you gotta start with an 24bpprgb and convert it to a monochrome. is that right? if not, how can you write text to a monochrome bitmap? I have started with writing to an rgb bitmap and am trying to convert it to a monchrome one b...more >>

I have a small application that reads a multipage TIFF (thanks Bob Powell!) and then simply rewrites the pages to a new TIFF file. It doesn't do anything to it except extract the pages and then reassemble them into a new file. The problem is that the new file is 778kb and the old file was on...more >>

Hi All! I’m trying to draw some text on image background and save it as jpeg. Unfortunately the text looks fuzzy even though I assign 100L to the Quality encoder parameter. Here is an example: I create a bitmap in memory and fill it with blue color RGB(93, 160, 231). Then I draw a te...more >>

Hi Is there a way to make my listview's background transparent? When trying to set a transparent color to the background of a Listview, I get this error message: "This control does not support transparent background colors" I didn't find any solution yet. Thanks ...more >>

GIF animations contain a frame display time that control how rapidly the new frames are displayed during the animation. The ImageAnimator class in GDI+ provides the UpdateFrames method which seems to do the same thing. (I discovered a page which claimed that an internal rate of 50 ms was used. I...more >>

I've created a user control that displays shapes at various zoom, rotation and offsets. Originally I wrote this to just update the background image and that worked relatively fine except when I zoomed in really far and it effectively had to resize it to be a very large bitmap. I decided to do ...more >>

Hey, all, I'm new to VB.NET, coming from VB 6 and I'm having a problem with the persistence of graphics. I use some graphics commands to put an image in a PictureBox control like this: Dim g As Graphics = PictureBox1.CreateGraphics Then I use some graphics commands like this: g.DrawLine ...more >>

Dear all I place a picturebox into a form with position (0,0) - left, top of the form how can i know the relative position of the picturebox with the window since the top left of the window = (0,0) i want to know the offset position of the picturebox with the window...more >>

how to extract the image from a mpeg file ...more >>

I want to get the histogram of an jpeg image into an array e.g. R 256 size and the number of pixels G 256 size and the number of pixels B 256 size and the number of pixels...more >>

Say I have drawn a number of lines on a form (forming a polygon), and I know the coordinates for each point in the polygon. Now, I want to draw a circle on the form, but I want to make sure that it doesn't overlap any of the lines. The approach I am thinking of goes something like this: ...more >>

does anyone know how to draw, resize, move and rotate shapes on a canvas like Visio !!? any examples or source code will be helpfull. thanks guys. ...more >>

Hi All, I am trying to Bulid Windows Mobile Forms Control with C# in VS2005 using CF2. On this control A lable is created and some text set for the control. My problem is that i dont know how lond the text is going to be. so i need to set the height and width of the label a cording to th...more >>

Bob, I've found your GDI+ FAQ a very useful resource and would like to make a small contribution to it. I' was just flicking through the FAQ this morning and came across the "How to draw a rounded rectangle" article and noticed that the DrawRoundRect ssubroutine wasn't optimised. The ...more >>

I'm using printing sample from here : http://msdn.microsoft.com/msdnmag/issues/03/02/PrintinginNET/ With Hewlett-Packard HP-GL/2 Plotter driver the aplication draw on desktop window . Kind regards, Cosmin ...more >>

Hi, I'm having an 'issue' using the LinearGradientBrush. I'm sure it's something I'm doing, or not doing, but it still has me flummuxed. I've distilled the problem down into a simple custom control. To see the problem, create a new class, and derive from Control. Enter the following code: S...more >>

Hi guys! Is it possible to create a transparent layer where I can write some text? This layer should be visible even when I run an image viewer in fullscreen mode. Thank you in advance,...more >>

Hi There, I am writing a C# .NET 2.0 application. It is borderless, but I never want it to cover the task bar. How can I get the position and size of the task bar in C# .NET 2.0. Thanks, Peter. ...more >>

Hi There, I have a C# .NET 2.0 application. What I need to do is make the mouse pointer dissapear if they don't move the mouse for over a second. It would appear again once they start moving the mouse again. Of course these things would only need to occur when the mouse is over my C# app...more >>

Hello, has someone ever had the problem that actions that can occur in the scrollbar can crash the whole application? In my application I have a scrollbar to scroll through a volume data of medical images. When I scoll by clicking the up/down buttons several time the application crashes in a...more >>

Hi There, I am creating a C# .NET 2.0 application. I am trying to create transparent buttons like the latest version of google earth. I am not really sure where to start. Some sample code is what I need. Also later on I need to be able to get it to fade in and out. Thanks, Peter. ...more >>

On an academic note, I want to copy a Graphic to an Image (Bitmap). I have the Graphic object but not a originating image; this is because I'm overriding the PrintDocument class OnPagePrint method which only provides me an e.Graphic (see code sample below). The FCL doesn't seem to natively sup...more >>

Hello, I'm having a problem using the Bitmap. I have a bitmap (32-bit ARGB) which I use as an overlay. The user can draw into this overlay to define several regions. The image is created like this: MaskBitmap = new Bitmap(Width, Height, PixelFormat.Format32bppArgb); and I ...more >>

How would I go about drawing a linear graident more complex than 3 colors? For example, recreating the gradient control available in photoshop, where you can place "markers" at more than 2 points, and specify the color of each marker. Any help appreciated. ...more >>

Hi All, I'm printing images with fairly large dimensions and color depth. As other have posted, I'm seeing huge print queues being generated when I print these. My print code looks like this: PrintImage(Graphics grx) { Image myImage = .... grx.DrawingImage(myImage, new Rect...more >>

Is there a way to draw an image in a box so it fills the box without stretching the image? In other words, the image adjusts size to fit in the box but does not alter its X-to-Y ratio. Thanks. ...more >>