I have the scenario below where I have a New Bitmap object and another bitmap that points to this object. Later on, I need to supply a GDI handle to a C routine. I get the GDI handle using GHBitmap, and then to get the Image back I call FromHBitmap. However, when I call FromHBitmap, I then br...more >>

What would likely be the simplest way to append one EMF+ file to another please? A code example would be wonderful, too, please. Thanks in advance. I did a google search and came up with nothing. ...more >>

Hi, I used a LinearGradientBrush to fill a rectangle. This way I created 'legend' in my chart control. Now I need to get color for specified point (value). I thought that I could somehow get it using LinearGradientBrush, but it seems that I was wrong ;( Alternatively I would have to create my...more >>

Hi I set this property of the print dialog to True but the program still sent the document to the printer but not to a file (although it did create the file the was empty) Any suggestions? Samuel Shulman ...more >>

Hi How can I give printing options from the PrintPreview dialog so the user will be able to select the pages to print Currently when the user clicks on the print button in the toolbar the document is sent immediately to the printer Thank you, Samuel Shulman ...more >>

how can i access/draw at the top of a window where the window title is in c# -- --- [ gusse ] --- www.gusse.net ...more >>

Hi, I've a requirement in which I need to implement autoscrolling.... Is there any control in .net which supports this functionality/............ My display list(data) should be scrolling ..............more >>

Hello, I am in need to find specific point in region. To be exact: Suppose, we have region like the one below __________ | _____| | | | | _____* <- this is the point (*) I am looking for, if one thought of region as a block of lines and attached to each line bounding...more >>

Hi All, I'm using Graphics.FillPath to clear the area under a plotted curve. It works fine, but the fill operation seems to "eat away" some of the thickness of the plotted line - maybe one pixel. Has anyone else observed this? Is there a way to stop it happening? Thanks ...more >>

I have a form that contains multiple shapes on it. Does anyone know how to zoom in and out of the form, while still retaining all aspect ratios and so on? Is it a matter of me having to loop through all objects and manually changing the size or is there a better way? I am using VB.NET 200...more >>

I know the answer to this is right under my nose, but I think I'm too tired to recall it. I have a form that uses a picture as it's background upon loading. I then have a panel on top of it that is used to click on and create a box on the area that was clicked on. What happens is when the box ...more >>

Hi, I am using the DrawString method to add 2 strings to a label at right-angles to each other (so one is horizontal, and the other string is vertical) Both strings start with 'S' - now, is there any way to make that 'S' diagonal instead of vertical - in other words, rotated clockwise)? Th...more >>

Hello, I'm joining multiple images to a whole one using Graphics classes DrawImage method. Unfortunately DrawImage leaves borders in those places where images are combined. How could I prevent this? I have tried to make a one big image with background color and then draw smaller images in...more >>

Bob, You have been a great help and I thank you very much. This may just show my need to brush up on Trig concepts, but now that I have my ellipse as a control and a property that allows the user to update the angle, I need the container to change in size as the user rotates the ellipse. In ot...more >>

I don't seem to find Opacity property for a System.Windows.Forms.Panel Control. How can I make a panel semi-transparent please? ...more >>

Hi, I want to create some simple transition effects for bitmap images. For this, I need to mix two images (or blend them, whatever that may be called) together to one resulting image. This should be done with a per-pixel weight of the effect. I have this working fine, however it's not as fast...more >>

I have a problem with a piece of code I am using. The following snippet draws a line onto a control. As the control is resized along with the Dialog on which it is placed the scaling is adjusted so that the line always runs from corner to corner. (This is a simplified version of what the co...more >>

OK, I've realised what is going on - it's my scale transform that is causing this. But that leads to the question - how can I retain my scale transform for the purposes of co-ordinates, but not have it scale line thicknesses differently in each axis? ...more >>

If I set the Opacity propery of a form to a value less than 1, then the form becomes semi-transparent -- along with all controls on the form. Is it possible to manually control the painting of the controls on the form so they are fully opaque but the form still be semi-transparent? I tried t...more >>

Hi all, I have been using Bob Powell's code from the GDI+ FAQ to draw primitives onto a form. It is working great, without an issues. I want to extend my program so that when I click a button it takes a snapshot of everything on the form and either save it as an image (BMP) or print it ...more >>

Bob, Thanks for the information. I have written an Ellipse control and was going to add an Angle property for the property Grid, but am a bit new @ all this and under some time constraints. Would you have any code snippets that would simulate this feature as the user updates the Angle property...more >>

I want to draw a line from point X and point Y (at any angle), with appropriate gradient so that it "looks like" a tube. Can anybody show the best way to do that? Sub DrawTube(ByVal g As Graphics, ByVal X As Point, ByVal Y As Point, ByVal Width As Integer, ByVal BaseColor As Color) ...more >>

I tried to use this method but the delegate never seems to be callled. As there is no text in the documentation I could only believe it's a new and deprecated function doing nothing they forgot to remove.. -- Regards, Lloyd Dupont NovaMind development team NovaMind Software Mind Mappin...more >>

When using Bitmap.GetHicon(), it sometimes throws the exception described in the topic. Details: System.Runtime.InteropServices.ExternalException was unhandled Message="A generic error occurred in GDI+." Source="System.Drawing" ErrorCode=-2147467259 StackTrace: at System.Dra...more >>

Hello, I am trying to create a font object for a custome font on my machine. When I use FontFamily ff = new FontFamily("MYFONT"); I get "Cannot Find Font MYFONT" thrown by system.drawing.dll If I try and use the following : rtb.CurrentFont = new Font("MYFONT", 10f); It creates an instance...more >>

Hi, here is the problem: I have some point coordinates with a range from -5.0 to +5.0 and I want to draw lines and strings depending to these points to a bitmap,control, emf, etc. with a size of 300/300 using the matrix class. This works fine, but I want to set the size of the pens in pixel...more >>

When you create a PrintDocument you could set the PrinterSettings.PrintToFile to true so that it print to a file. What kind of format is it printed to? I have created such a file but I don't know what to do with it..... ...more >>

The following code (in PrintDocument) doesn't produce the expected output on some printers, any thoughts? protected override void OnPrintPage(PrintPageEventArgs e)| { e.Graphics.DrawLine( Pens.Red, e.MarginBounds.X - 10, e.MarginBounds.Y, e.MarginBounds...more >>

I have a C# application, using a mix of GDI+ / System.Drawing.Graphics = and plain GDI to draw Problem is: If I just use g.Graphics.GetHdc() it appears that when I print, I have = different coordinate system. Even though I did no scaling but just translation. Now I'm trying to setup the GDI ...more >>

I need to create an image that essentially is only drawing text. The text is known only at run time and so I need to create an image but don't know the size (it's a one liner so the width is where my trouble is). I create my font like so Bitmap bmp = new Bitmap(20, 20);bmp.SetResolution(150,...more >>

Is there any way possible to rotate a .NET control using GDI+? Or some other means. I wan to allow the user to select say a TextBox and turn it x # of degrees? TIA, Jason Hall ...more >>

I would like to know how dynamically generate the curve diagram for data analysis (such as frequecy, probability density curve) on web page or windows form. Thanks for any help. David...more >>

I am trying to reduce the size of images stored in SQL server tables by converting them to reduce the bits per pixel using GDI and can't get anything but black bitmaps. I have tried to follow the examples presented in many newsgroup threads but am having no success. Some of the images I am...more >>

Hello I have a C# component for a legacy COM system. It is passed an HDC, on which it's meant to draw things that will be printed on a printer. If I use P/Invoke, all is good. I can do things like IntPtr hDC; // get the hDC./. TextOut(hDC, 200, 500, "HELLO", 5); The text appears in ...more >>

I have drawn 7 horizontal lines across a single blank presentation slide which I intend to print off, in Microsoft Powerpoint 2000. Each line is a different color and is adjacent to one another, to form a type of rainbow effect. Each line needs to be 4 pt in width. How do I eliminate the ...more >>

I've been with a problem for about two months and i've bought books and search the internet for an explanation, and haven't found one. I'm developing a cephalometric software, that needs to capture an image from the scanner, mark the image with dots in order to find distances and angles. Every...more >>

Note this is something I posted to the WinForms newsgroup. I thought that many on this alias might have good information on this. -- Thanks, Nick "nickdu" wrote: > What I would like to invalidate are individual cells. And I don't want to > only know about a bounding rectangle. T...more >>

Please help! I'm absolutely perplexed by this problem. I have a PictureBox on a Form in .NET 2.0. I allow my user to draw polygon(s) on the image, and I record the points and draw lines as so in the PicBox.Paint handler: e.Graphics.DrawLine( blackPen, polygonPts[ i ], polygonPt...more >>

Hello, I have this problem: I have a small bitmap 2x2 pixels size. All pixels in this bitmap has RGB values (195, 204, 218). I save this picture in files (formats) JPEG, BMP. I load this pictures in code, to the Bitmap and call GetPixel, the Blue value in case JPEG has value 219, in case ...more >>

Hello, I'm looking for a graphic control I can use in .NET. I need the following features: - drawing shapes - filling shapes with color, gradient or texture - drawing splines, arcs and curves - present the drawings on a graphical map (jpg) I prefer .NET technology. I know Vector Graphi...more >>

Hi, I have taken the code from http://www.bobpowell.net/manipulate_graphics.htm. This works great for creating simple shapes but I have tried to extend the functionality. What I want to do is add images to the screen, so that they work in the same way as all the other shaped. My code...more >>

hi, does VB 2005 provide an equivalent of LockWindowUpdate ? I want to achive that without using win32 API. Also, can anybody please give me some pointer on where i can get all APIs and their .NET equivalent. I will be thankful for any help on the same.. thanks sanjay ...more >>

Hi All I need to add icons to the header of a ListView control, the bitmaps (icons) are save as one single bitmap resource.. I managed to do most of the job but the bitmaps drawn with thier background color. How to make them look transparent? Any help is deeply apperciated. Bests ...more >>

I created a drawing program using VS.NET 2003. I use GDI+ for the graphics. I also wanted the option of creating Image files using the same painting software. Here is what I do: // Create bitmap Bitmap bmp = new Bitmap(32, 32) // Get a graphics object Graphics g = Graphics.FromImage(bmp)...more >>

Hi All, I started a blog www.kalyanganjam.blogspot.com few months ago. I would like to post articles on .NET Graphics on this blog. But, I dont know where to start, naturally, as a consequence of the vastness of the subject. So, I decided to do this post and get as many questions/issues you may...more >>

All - Without much luck in framework.windowsforms group, posting it to framework.drawing. (*) Is it possible to get the gradient colors that Office 2003 uses for its toolbar, programmatically? For instance Outlook 2003's toolbar under Blue, has a Horizontal Gradient fill from Argb(2...more >>

hi, I am drawing a ruler with displayes as such |'''''|'''''|'''''|'''''|'''''|'''''|'''''|''''' and so on 1 2 3 4 5 6 7 8 when i scale it to view at 200% , numbers below the bars also get enlrged as such. It was not so when i used "pictureBox1.Print" method in VB6 whatever be t...more >>

my 2.0 web app reads an Image from file, resizes it to thumbnail size and uses Image.Save() to save it as a gif file. I want it to be gif format, no other (if I save it in another format, say jpg this doesn't happen). What happens is that the color palette is reduced to 16 colors so the result...more >>

Hi all, We have an ASP.NET framework 1.1 application running on windows server 2003. We currently have code to upload images into an sql server, which is working perfectly. Here is the current code, The first function SetImage takes a stream, and a file name from an HtmlControls.HtmlIn...more >>

Hi All, I am new to GDI and I am faced with a problem of drawing sharp text on gifs. I am using the DrawString API with truetype fonts likeVerdana.Arial etc. However, at lower resolutions of 200 the text has craggy edges. Also, when I zoom at up 400 % I can see more craggy staircase on the ...more >>