Hello, I am a VB.NET programmer and I have a JPEG image file (from digital camera) of about 109 KB's in size, when I open it and save it (without making any alterations at all, just going to File --> Save) in MS Photo Editor, the file is automatically shrunk in size to 81 KB's. When doing the...more >>

I'm looking to be pointed in the right direction. I need to display a large number of shapes at different points (>1000 entities). I need the allow the user to zoom in and out and pan around on the display. I also need to be able to refence a shape at a given point with a mouse click and display...more >>

Hi, I've been trying to do a really simple thing with the GDI+ DrawString method - draw wrapped text in a "proposed" rectangle - that means that the text should wrap as soon as it (b)reaches the rectangles right edge, but not have sliced words. But I've been getting really strange results, lik...more >>

I sometimes got some AccessViolationException from System.Drawing.dll. It doesn't happen everytime but it happens like once a day. Is it a known issue in .NET 2.0? I've never got this kind of exception in .NET 1.1 (even NullReferenceException) System.AccessViolationException: Attempted to rea...more >>

I have a region that was created by cloning one, and excluding another. How do I draw a border around this new region? There is no graphics path. Paul ...more >>

This is going to be a big issue for me in the future - do I invest the time to learn managed DirectX, or can I stick with GDI+ and wait for hardware acceleration support to be added later? Paul ...more >>

I have dynamic image(s) on the clipboard that I need to save as a transparent gif. There are a number of posts regarding MakeTransparent but I cannot get this to work for what I am trying to do. I am NOT loading the picture into a form and there are no paint events to consider. All images have a...more >>

Greetings, I just no noticed Wellformed.net and was wondering how to download the code samples? Also, will there be future editions? Thanks, Shawn ...more >>

In my OnPaint method I'm applying scale and translate transformations (Graphics.TranslateTransform and Graphics.ScaleTransform) to my graphics, however I don't see a clean solution to for applying this transformation to the ClipRectangle. The clip rectangle isn't particuarly useful until it's b...more >>

I have read many many articles on drawing in .net but I guess the wording i'm using to search is not correct. I have a form that when I hit a button, I would like to hide the form and be able to use the mouse to select a rectangle anywhere on the screen (windows desktop) and get the height, wi...more >>

Hi, One of my developers are facing an interesting problem regarding UserControl invalidation. The problem is: We have two forms in our application. Form A does nothing except loading of Form B and Form B contains an array of UserButton kind of contol (we have created our own buttons deriv...more >>

Hi all, Can anyone help me in creating a statastical Graph(Bar/Pie charts) using = ..Net??? Thanks in advance. --=20 Warm Regards, =20 Rajesh.K Programmer, iInterchange Systems Pvt. Ltd., V S & B Nitekan, Y Block, New No.8, Old No. 50,9 th street, AnnaNagar, Chennai - 600 040, India...more >>

Greetings, I'm creating a series of custom controls that derive from either UserControl or Control. I want to draw my own border based on the DrawBorder3D(). Is it necessary to capture WM_NCPAINT event in these cases? If not, then what is the best approach. Assuming I don't need to hand...more >>

Greetings, How do I make a custom (derived from Control) Scrollbar (or other control) participate in the WinXP theme schemes? Thanks, Shawn ...more >>

I have a PictureBox control on a form that displays a bitmap. However, the bitmap rarely matches the size of the PictureBox. The different SizeMode properties don't really do it for me. In one case, it changes the size of the PictureBox itself, making it larger than the form. In another,...more >>

Greetings, I'm creating a custom control that should paint a custom border from the DrawBorder3D method. I'm subclassing WndProc and capturing the WM_NCPAINT message as follows (pardon my brevity): public event System.Windows.Forms.PaintEventHandler NonClientPaint; protected virtual ...more >>

i have an home page that contains many controls and links. i wud like to group all these on the left side of the page and partation it from the rest of the page using a vertical line. So is there any way in C# , ASP .NET to draw a vertical line. Like how there is a drag n drop for horizonta...more >>

Hi All, A need for a diagraming component again. I need one of them that is free or open source and don' know where I can find one. I need it for drawing some Business Diagram that is consisted of several Circle and Arrows. Circles may have an loop on theirselve. It's the basic that I need now....more >>

Hello How can I get the number of colors used in a jpg or a bmp or a raw image with dotnet c#? Any hint? Thank you Sincerely Lore ...more >>

Hi, I have read a good article on GDI/GDI+ by Lars Powers. ( http://www.code-magazine.com/Article.aspx?quickid=0305061 ) Unfortunately the sources are missing on the indicated web site. I would like to know if some of you have them or something similar in C#. Thanks a lot : Kib....more >>

hi is this the right group for gdi+ or rather the group: win32.programmer.gdi -- Thankfully, YisMan...more >>

I need to create graphics and use them in my web pages dynamically. I see examples about GDI+ in windows forms applications. But i need to create graphics to use with asp.net pages. How can i do that, or are there any tutorial or article about that?...more >>

Hello, When I save any image as GIF, gdiplus always uses its halftone palette, right ? So I did a test, and then retrieved the color palette, and found that there is the color ARGB 0 (zero), that means 0 for Red, Freen, Blue and Alpha. That is the only color that has ALPHA = 0 So, that m...more >>

I set HasMorePages to true, but it doesn't let me jump to next page. (Of course, if I remove the HasMorePages = false in my if statement, it will create hundreds of pages). Any suggestion? Thanks in advance. Leo My code to call the print event: .... { m_PrintDoc = new PrintDocument(); ...more >>

Hi, I need to draw a group of shapes (rectanges) that will be larger than the control (from what I read on Bob Powles link it should not be a picture box :) that they are drawn on. Then I need to be able to scroll so it can be seen in different areas. What is the best way of doing so...more >>

Hi, I'm building a skin for my form in c# and I have a little problem. I'm using NCCALCSIZE to resize my client size and give painting space for my custom borders. For some reason, the form is getting smaller every time I restoring it from minimize / maximize states. This is the code for...more >>

Hi! I need to extend a third-party program that paints text on a Panel using the Graphics Object. The customer wants the text to be selectable so that he can copy it to the clipboard. I am completely new using Graphics in .NET. Is this feasable using the panel and graphics objects? Thanx...more >>

is it possible that we can make a simple ms paint like interface with asp2.0(simple draw proccesses only) . if possible which libraries we have to use for it. ...more >>

Hi, I have code that adds a BarCode to a scanned image that is stored in a SQL database. It works fine for scanned images that are 8.5 x 11, but I also have some images that are 24x36. When I try to add the barcode to these larger images I get the Out of Memory error. I put the image on ...more >>

I'm working on a project that involves irregular shapes -- nodes in a complex animated directed graph, really -- and I was wondering about how I should go about building my architecture. I've been fooling around with a "roll my own" approach, in that I'm drawing the shapes in a Panel.OnPaint m...more >>

Hi, I was wondering if anyone can tell me how to transparently overlay text and images on a Windows Media Player or Shockwave control. thanks, Keith Langer ...more >>

I am having a problem getting my graphics to stay on a form on certain machines. I have a heat transfer project that does some calculations and then gives a visual representation of the results. The graphics are done within the code and look great, but on computers without visual studio, the gra...more >>

Hi I have to create some icons (from bitmaps) with transparent pixels. The problem is that creating them with "System.Drawing.Icon.FromHandle(mybitmap.GetHicon())" makes the transparent pixels in the bitmap black !! I tries settings the pixels in the bitmpa to every possible color (Transpa...more >>

Hi All, I created an owner draw Listbox with icon in each item. When I disable the listbox, the content and scrollbar inside will not be gray out automatically. Any suggestion to make the icon gray out (apply a filter to the icon bitmap before drawing can work?) and also have to make sc...more >>

Is there an equivelant to the Rectangle.Contains(Point) but for a Polygon. I'd like to detect if the mouse is over a wierd shape that I've drawn. Thanks. Steve. ...more >>

Despite searching for the past 4 days I have not found any solution to what should be a simple task: Create a PictureBox which renders its Image with an alpha value so that other control underneath it can show through, similar to what you get by setting a Forms opacity. The usual recommendati...more >>

Hello, I am trying to cycle images (tif) through a picture box. Say 5 or so. Its really slow and does not refresh for each image. How can I make sure that the user can see the images and also speed it up. Im using vb .net and wrote basically the same code in c# to see if it was faster. Any...more >>

Hi everyone, I'm trying to write up a simple image stamper application that stamps the Exif date information from the jpegs that I've taken from my digital camera and saves the new file with the date stamped on the lower right part of the picture. (I'm not an advanced programmer so my code ...more >>

Hi everyone, I'm having some problems with the various clipboard formats, hopefully someone can give me some pointers. A certain application seems to copy it's image data to the clipboard as MetafilePict and not MetafileEnhanced. How can I get the data from the MetafilePict clipboard ent...more >>

Hi, I'm going nuts trying to work out why I'm getting a "Generic" error. I've included the code below. The error occurs when trying to save the file ( marked with a "HERE" comment). This is a console app'. Any help or suggestions for reading appreciated. Thanks FileStream fs = new F...more >>

Using VS 2005. I'm just beginning to learn about drawing in .NET, sorry if this question seems stupid. Here is some code: public partial class MainForm : Form { Bitmap b; public MainForm() { InitializeComponent(); int w = Cli...more >>

Hi: Can anyone please give me a possible solution. I need to write a function in .NET which would accept an array of image urls and should return one image. The method should create a new image by iterating through each image url, read the image and overlap one image above the other and ...more >>

Hi I have problems to display certain lines of text on my display. I know how many rows are in my text, eg 20. And I know the resolution of my Screen: Screen.PrimaryScreen.Bounds.Width Now I want to display my text with Verdana bold as big as possible. Something is wrong or missing in my func...more >>

I was trying to open a tiff and write text to it using GDI when I came across the error "pixel format of the original image is indexed" I have read the groups and followed the instructions in order to come up with a solution but the problem Im having now is the sizing. When I open my image ...more >>

Hi, I tryed to draw a rectangle but it only appears when the code is in the Paint Event. I would like to know how can I draw something after a button click. Thanks in advance CC ...more >>

hello everyone, I am using a picturebox to show a map image. Only a part of the map image is loaded each time. The user can grab the map image in the picturebox and move it inside the picturebox. whenever the user reaches the part of the map which is not loaded , the new part of the map is l...more >>

I am using .NET 1.1 (C#) to draw a graph. I am having trouble printing overlapped polygons that are filled with a transparent brush (HatchBrush(AHatchStyle, AColor, Color.Transparent)) to a PDF (or any PostScript based printer.) They print as though they are opaque, not tranparent. I co...more >>

Hi all, I have a byte[] and I'm trying to stream it back to my aspx page using Resposne.OutputStream I set the content-type to "image/gif".. but when I stream it back, I got a png instead. here is a watered down version HttpContext.Current.Response.Clear(); HttpContext.Current.Respons...more >>

Hi all I'm drawing text and some other shapes on bitmap buffer. All objects just in one pass, but the text looks fuzzy as it were painted more times when bitmap is dropped on Graphics. I checked it with diagnostic output and it's drawing method is called just once, same as on other shapes. ...more >>

Hi all, Can anybody help me with this? I'm trying to convert this Color Quantaizaton code from unsafe to safe, but I don't understand pointers. How can I do convert this code to the safe version? I know from research, I can get a byte of a bitmap by doing byte pSourceRow = Marshal.ReadB...more >>