just to let you know, i really appreciate your work here. you helped me a lot with my System.Drawing based work, so i've decided to place your name in credits part of the app i'm just about to release. keep up the great work Bob :)...more >>

When i try to use the below code which i copied from msdn, i am getting the error like "No PInvoke conversion exists for value passed to Object-typed parameter." LogFont logf = new Microsoft.WindowsCE.Forms.LogFont(); // Create graphics object for the form, and obtain...more >>

I need to do some manipulation of Tif images, however I'm encountering problems with multi-page Tif files. If there are three or less pages in the Tif, everything seems to work fine. However once the Tif goes above this I get a 'System.OutOfMemoryException: Out of memory.' - this is strange be...more >>

Can someone please explain angular coordinates?? ...more >>

Hi, I have been trying to achieve a zooming effect. ScaleTransform seemed to be the obvious choice. But what I need is a zooming from the center of the screen in all directions, and scaletransform scales it from the (0,0) point to the right and bottom only. I have tried using combinations of...more >>

Hi all! I have a problem with the DrawString method. I wrote this little code that reproduce the problem: private void Form1_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; StringFormatFlags flags = StringFormatFlags.MeasureTrailingSpaces; Rectangle...more >>

Hello! Is it possible to scale graphics components, such are line, rectangles etc, when on paint event occurs? I want to scale the line that was drawn with scale factor 1, so the result of scaling should be the grained line. Regards Saso...more >>

Hello! I've created an image of 5x5 pixels size and put red diagonal line from point 0,0 to point 5,5. I want to zoom that image for any scale factor (in attached example 15x). Interpolation mode is set to NearestNeighbor. Why entirely image is not scaled properly, first pixel and last pi...more >>

Hi, I want to take 2 images and fade them from one to the other... I want to do it full screen (for a screen saver)... Using the .NET graphics, I got a 3 FPS for what I want to do on a P4 3Ghz... Is there a way I can draw faster? I mean, there must be a way I'm drawing the images 3 times : ...more >>

hi, how can i save a grayscale (8bit) image? i tried using System.Drawing.Imaging.Encoder.ColorDepth but when i try to save jpeg wither using 8 or 1bit i always get 24bit one. when i try to save tiff i get an exception when i try 8 or 1bit. what's going on?? here's code example: using (B...more >>

In the release version 2.0 how do I find from inside and OnPrintPage event handler if the output is going to a preview controller? Before 2.0 you could check the page size before compensating for printer hard margins now that has changed. On the pre-release there was supposed to be a way...more >>

Hello , I am looking for a way to disable the mouse (in a c# application) for a measured time. I would appriciate any advice. Thanks Shulya ...more >>

hi, is it possible to use CMYK colors instead of RGB when drawing to the printer? if so, how can it be done? standard Color struct allows only ARGB colors. I need to draw something that is in pure CMYK Black color (C0:M0:Y0:K100) and i have no idea how can i do that....more >>

Hi dears, I need an exact replacement of SetPixel() and GetPixel() functions (VB.NET), only for the specific format PixelFormat.Format64bppArgb, using LockBits. I have already browsed Bob's site, but I am too unfamiliar with this stuff to attempt to produce myself these 2 functions. I n...more >>

Hi, I don't know if this is the right thread. I'm actually working on a simple graph tool seeing as though .NET doesn't come with one. I have a control which I want to add bar objects to. I need the bar objects to have certain properties like height, width, colour etc. Sounds like a rectang...more >>

We have a program that uses GDI+ with .NET 2.0. All rendering is being done by the CPU and not by the graphics card. What is going on here? Do graphics cards not support GDI+? Which graphics cards do support it? Thank you, Scott ...more >>

hello everyone, I am writing a GIS application, in which I move between the zoom layers using the mouse wheel. When the user uses the mouse wheel in order to zoom in for example (mouse wheel up. I would appriciate if someone told me how can I know when the mouse had completed one round exact...more >>

Any way to extract a single frame "preview" or thumbnail from an AVI file. I would love to use GDI+ and avoid 3rd party utilities. I will be saving this as a JPG or GIF. Thanks for any pointers. -- Andrew Robinson ...more >>

Hi friends. I wanted to gradient-fill a circle in such a way it "looks like" a 3D ball. Does anyone has a convincing example of that? tommaso ...more >>

How do you embed a cursor in a project and create it? I created a cursor in a project, I can use it using the Cursor(String) constructor, but I cannot get it to work with the Cursor(Type,String) constructor. I'm missing something really simple. The resource view has an ID assigned to it, d...more >>

I have 16-bit data that I want to display. In order to display it I compress a certain range of the input data into 8 bit (I need control over this). All seems to work ok except that it is dead slow both in release and debug mode. The main problem is the for-loop shown in the code bellow. Withou...more >>

I'm applying an ImageAttribtues object with a color matrix (to set the alpha channel) to a bitmap. The resulting file is viewable in mspaint, etc., but it doesn't seem to be a universally "usable" bitmap: I can't use it for a desktop background, for example, presumably because the ImageFlagsHasT...more >>

Hi all! When I draw a stretched image with DrawImage, it is drawn with a big antialias (it is not jut resized). Is there a way to regulate this antialias? And can I draw it with a rensparency? Thanks! -- Free .Net Reporting Tool - http://www.neodatatype.net ...more >>

..NET Drawing Colleagues, I have the following scenario. I have a large number of JPEG images on my hard drive. These are basically frames from a video. They can be converted to BMP if necessary. The general idea is to display these inside a PictureBox very rapidly simulating video, at up to a...more >>

hello everyone, i am attempting to open a raw image, and produce 3 resized/optimized images. the code below is mostly from the sdk documentation, however it does not work: Bitmap bmpRA = new Bitmap(strIMG); //raw image Bitmap bmpLA = new Bitmap(bmpRA, 300, 225); Bitmap bmpME = new Bitmap...more >>

I can draw a 100x100 section of say a 150x150 bitmap onto a form or control very quickly (it takes 70ms to do this 100 times). If that bitmap is say 2000x2000 then it takes 3500ms to draw it 100 times. Why is there such a difference? I'm still only drawing a 100x100 section from each bitmap so...more >>

Have I posted the message to wrong newsgroup? Or Does the question is so much strage? Would someone please kindly direct me to a true newsgroup or resource? Best Regards Hamed "Hamed" <hamed@raymehr.com> wrote in message news:u0zFFR7vGHA.4880@TK2MSFTNGP04.phx.gbl... >> Is it pos...more >>

In VB6, there were currentx and currenty properties that you could use to find out your location after printing some text or drawing a line. Does vb.net have similar properties? ...more >>

If you look in the documentation for the rectangle.Right property, it states that the value is the sum of the rectangle.X and the rectangle.Width property. This does not add up in my book. Consider the following: A rectangle which starts at pixel 0 and ends at pixel 0. As I see it, this rec...more >>

Hi, I've just got a problem about using custom ttf font file. below is the code: string path = "~/TT3028M_.TTF"; PrivateFontCollection pfc = new PrivateFontCollection(); pfc.AddFontFile(path); FontFamily ff = pfc.Families[0]; if (...more >>

using asp.net on windows 2003 Is there any way to get the final size of an image i have resized using system.drawing.imaging? This is partly to be able to set Response.AddHeader "Content-Length" so the browser knows how long he'll have to wait, and partly to be able to measure any particula...more >>

Hi, I want to have a list of the display devices available on the computer, just like the Settings tab do in the desktop properties... What I need is the DeviceID, it's rectangle(left, top, width, height) and if it's active or not. Is there a built-in function to get these informations in ...more >>

Hi, I'm trying to make a control paints itself. I can do everything I want except for the device number(string containing only 1 digit). I would like the number to be resized when the control resizes... Right now I use the e.Graphics.DrawString(string, Font, RectangleF, StringFormat), but th...more >>

Hi, I'm trying to use the PrintDocument & PrintController objects to print a file. As part of the process of printing this particular document type, I pass the hDC (device context handle) and let a third party external API render the document to the hDC. The issue here is that this third pa...more >>

Hi, I am using .Net framework 2.0. I am displaying a context menu of type System.Windows.Forms.ContextMenuStrip. When it is being shown (event: Opening), I am adding the items (with images) to the menu if it is not done already. Based on some criteria I am disabling and enabling menu item...more >>

Hi, I was in the process of designing a windows user control, in which i would like the user to see the Text with the Transparent Effect. For this, i was trying to set the Alpha property of the ForeColor to some value (0 to 255). But it does not seems to have any effect on showing the...more >>

Hi all, i need to create font creation tool.Like fonts must be created in an editor.Can any one help in this how to start. -- Regards, Ravindra P.N ...more >>

Hi, we are using a web application which sending a bitmap from server. we are facing a problem in a page which throws the error "Object reference not set to an instance of an object". but this error is not consistent. when we make call to this page from the browser more than twice then it thr...more >>

I am getting a following exception for the below line of code (in red = color). I am wondering how it is possible. Exception: System.NullReferenceException: Object reference not set to an = instance of an object if (strokePen !=3D null && objGraphics !=3D null){ if (float.Parse(style["x1"])...more >>

Here is an example of drawing a simple sine curve plot using VB 6 code. The code for the rotated label is pretty ugly, but it works (I've been doing it in a similar fashion all the way back to GWBASIC). I'm sure that part will be a lot simpler in .net. What I'd like to see is VB.NET code tha...more >>

I've seen a lot of discussion about this on all sorts of websites but not actually found a definitive answer. I have written a relatively simple 'photo library' application using ASP.NET / VB.NET - if the user attaches a large photo the system should automatically reduce the size of the photo do...more >>

am getting following error when I click ok. I have got this error while writting images in windows application.I am using visual studio 2005 I tried to get the exact error by putting my code in try catch block, and then the first error displayed is Parameter is not valid A g...more >>

Hi, Sometimes I need to draw some 3D objects on windows forms. DirectX and OpenGL are great but, you know, not correct solution for simple cases like one I want to implement. Some other drawing libraries are available but I also want to know how to draw 3D objects. So I need some primitive ...more >>

Hi All, I'm wrestling with graphics transforms - trying to draw a graph into a rectangle within an image object. I can get it to work pretty much, until I start trying to scale and translate it according to the range of the data (which seems to be the "right" thing to do). What's really not...more >>