hi I'm trying to get a picture from webcam, maybe with vb.net or c Can anyone help me with that Antti Laakso...more >>

I got an out of memory exception when trying to open a tif file. But the tif file can be opened from windows imaging. MSDN mentioned that an out of memory exception will be thrown "If the file does not have a valid image format or if GDI+ does not support the pixel format of the file" How I...more >>

Does GDI+ have the ability to retain a sub-coordinate system? For example, say I create a triangle spaceship through a graphics path with the ship pointing in the direction of the x-axis. Then I rotate that ship slightly. Then I want to translate the ship forward (no longer parallel to the x-a...more >>

Can any body tell me how to have a free-form{polygon} selection of an image in .NET. The one the look alike of the one in the mspaint free-form selection. Thanks in Advance suresh...more >>

Hi, I'm new to the GDI graphics programming and would like to know what's the real purpose of the overridable OnPaint event? I mean, I have tried to draw something on my control in a normal sub and it still can draw when I call the sub in the program without going through OnPaint. This also happ...more >>

Hi, When I try to RotateFlip a Metafile object i get an NotImplementedException. I would like to know if anybody knows a workaround for this ? Regards, Rasmus Oudal Edberg ...more >>

Hello, How can i copy custom pixel wrom Bitmap to another Bitmap. Example: Source(0,0,640,480) -> Destination(10,10,40,40) where params(x,y,width,height) I tried with folowing code, but i got some strange results. Code worked only wor examles where: pt1.X = ....61,65,69,... Please...more >>

public static Bitmap Copy(Point pt1,Point pt2,Bitmap bmpOrg) { int PixelSize = 3; int width = pt2.X-pt1.X; int height = pt2.Y-pt1.Y; Bitmap bmpCpy = new Bitmap(width,height); BitmapData bDataOrg = bmpOrg.LockBits(new Rectangle(0,0,bmpOrg.Width,bmpOrg.Height), ...more >>

hi all, i want to use "Windows Picture Viewer and Fax Viewer" in my c# app to manipulate images, picture viewer is found as a DLL (shimgvw.dll) in System32 folder of WinXP. can some one tell me how can i use it in my C# app? TIA - sci ...more >>

Hi I tried to print a treeview . What I need is a image object from the treeview I am looking for CLR compliant way not using PInvoke I trie Graphics gr = Graphics.FromHwnd (tree.Handle ) Bitmap bmp = new Bitmap (width,height,gr) Image img = Image.FromHbitmap(bmp.GetHbitmap()) but if i tr...more >>

When I run this code I get this error. If I comment out DoubleBuffer, the program works fine. Can anyone figure out why it is failing? Error message: An unhandled exception of type 'System.ArgumentException' occurred in system.drawing.dll Additional information: Invalid parameter used. C...more >>

Hi. I have made a simple painting applcation. I have a mainform wich creates a class called drawingPanelwich inherit from Panel. In the drawingPaneli have overriden onPaint an the the painting. Now on my mainform i have a button called Print. I know how to print .....PrintPageEventArgs e (e....more >>

If I create a string that dynamically gets updated with characters I type on the keyboard, the System.Drawing.Graphics.DrawString method shows the characters in the updated text moving back and forth - rather than the original characters maintaining their position, and the new characters being appen...more >>

Hi, I've just discovered that accessing Image.Height (and probably other properties) in a multi-threaded environment can cause access problems (as a test, you can spawn a hundred threads and get them all to perform a couple of multiplications on an image's height and width ). I know I can prev...more >>

I have a drawing that I have exported from Corel Draw to EMF. When I draw the image on a form it looks very bad (pixelated). How do make it look like the original? Thanks! Bob...more >>

jeez, the search function on this forum stinks. I never find anything there, so forgive me if this was asked a thousand times There are two colors in a gradient caption, both are modifiable by the user. In SystemColors I can see an ActiveCaption color, but how can I find color 2? Obviously a gradi...more >>

I have created a class that extends the System.Windows.Forms.Button class and am attempting to create a shaded background by overriding the Paint event. However, when you first place the control on the form, you see my shaded background for about 1/2 a second then it changes and looks like a no...more >>

hi, i want draw dotted lines and/or rectangles on a bitmap at high-speed. how can i achieve that? TIA - sci ...more >>

Hi All, I want to use the DateTimePicker in my application but there does not seem to be any way of setting the date to null or the edit portion of the display to be blank. The checkbox does look crap, Does anybody have any idea about achieving this? I also tried having a text control and a...more >>

We have developed a free image-viewer for testing .Net and GDI+ capabilityes. e-View supports a lot of raster and vectorial image formats: -Bitmap (BMP) -Graphics Interchange Format (GIF) -Joint Photographic Experts Group (JPG) -Portable Network Graphics (PNG) -Tag Image File Format (TIFF) ...more >>

Do you know how can I move the position of a MainMenu instead the top-most... like Office and Visual Studio do Thanks Kleber Muffat Campinas-Brazil...more >>

Does anyone know of any free (simple) chart control for .net. I don't mean that MSCHART.ocx, cause probably that is causing problems in my app. bar, pie, 3d bar Arki...more >>

I am working on a picture viewer and some of the images (jpg) have resolutions as high as 2700 or 1350 for the HorizontalResolution. These images also have a 'Flags' value of 0x13088 whereas images with 96.0 H and V resolution have a 'Flags' value of 0x12088. The picture format for both is 24bpp ...more >>

hi, how to display image (save as image in sql server) in asp.net ? ...more >>

I am writing an application that has a form that needs to display a grid of squares (20x20) that could possibly each have different images in them. Initially, I had each of the squares represented by a different control, which I designed myself. However, the grid was getting drawn much too slow...more >>

I am having a custom struct called ControlMargin which will have Left and Right. It is ame as that of Size which has Weidth and Height Now I am using this struct to define a property called Margin which is og the type ControlMargin But when i am going to the designer of my control i am not abl to ...more >>

Dear NG, I want to build a car-rental application, where cars can be rent for some days. I want to display a table "Cars" and "Day", eg. 20.05 21.05 22.05 ... Car 1 X X Car 2 X X X Car 3 X .... My questi...more >>

Hi=20 Is it possible to change the colors of a colorpalette from an existing = image and then save it to a file with the new colorpalette? This is my code - but it doesn't work: protected void SaveAsNewImage() { Bitmap bmp =3D new Bitmap("test.gif"); // The existing image bmp.Pal...more >>

I'm trying to build a Math Editor UserControl. The UserControl contains two Panel controls. The first, pnlScreenContainer, contains the second panel control pnlScreen. This arrangement allows me to scroll pnlScreen inside the pnlScreenContainer control without running into scrollbar issues present w...more >>

hello, i tried to extract iptc fields (description, author etc) with .NET 1.1. unfortunately i dont know how. i tried the propertyitems of the Image-class but this doesnt return the results i wish it does. anyone knows how? thanks in advance thomas ...more >>

I just can't find out the way to get the handle of a window....more >>

Hi all . I'm trying to figure out how do I check the color of a specific pixel in an Image .. anyone can help ? Thanks -------------------------------- From: Alex I ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>JxJBMhoabk6Y8ttDzYZ1Qg=...more >>

H I am having a custom control which is having a Drag Event Now what i want to do is I want to call "Invalidate" on my control when the user of the control registers for this event. Because the requirement is like if there is a listner to this event then i have to draw a texture where he can drag ...more >>

Everything is in the title... In fact, i get a bitmap in grayscale that has been captured with a scanner the code is approximately this one: Dim MyImage As Bitmap MyImage = myfunctiontolaunchthescan() MyImage.Save("c:\test.jpg", I.dont.remember.Jpeg) The result is i a picture in graysca...more >>

I am currently investigating the fastest way to draw an offscreen bitmap to a control usingthe following techniques in VB.NET 1. graphics.DrawImage 2. graphics.DrawImageUnscaled 3. using the bitblt API in GDI The idea with the last item is that the GDI bitblt call may be hardware accelerat...more >>

I created an owner-draw listbox with background image , i draw per item using texturebrush like this: e.graphics.fillrectangle(otexture,e.bounds); e.Graphics.DrawString("test",FontUsed,otexture,e.Bounds.X,e.Bounds.Y); In order to avoid flicker, I rewrite the WM_ERASEBKGND & WM_VSCROLL in WndP...more >>

I keep getting an "ExternalException: A generic error occurred in GDI+" from the following code that attempts to combine two single page images into one two-page tif. Has anyone successfully done this? using System; using System.Drawing; using System.Drawing.Imaging; public class TifTest...more >>

I have a form and in the form I have enabled autoscroll property and I want to enable only vertical scroll bar..How can we do that.. Appreciate your response...more >>

I have a custom control that operates as a header for other text controls. It consists basicaally of a single line of digits used as a ruler. I have a mouse 'slider' object which follows the mouse movements horizontally. How can I constrain the cursor position to be 'between' the chacters (Cour...more >>

Hi all, I want to be able to draw a region's outline in a dotted line. There exists a function (GDI) called FrameRgn which will do it in a solid line, the problem is FrameRgn takes a Brush not a Pen so the only way to dot the line is by giving it a hatchbrush (not good enough for me). There ...more >>

hi every body i work with shaped forms using region but i need to over load the title ba Can every body tell me how can i painting on title bar thanks...more >>

hello, currently trying to write a custom control that will display an image in true transparent form, e.g. can actually see the background images placed behind the control rather than the background graphic held on the form. Have produced a region which will hold the outline of an image tha...more >>

I'm trying to teach myself the basics of image handling with VB.NET and GDI+ and I'm stuck trying to figure out how to save an image with encoders and encoder parameters. Part of the problem is the MS documentation seems to be really sparse in this area. I found an example through this newsgroup...more >>

According to the docs, the non-parameterized overloaded version of this method says that it makes the "default transparent color transparent". My question is-- what is the "default transparent color" and how might I 'get' or 'set' it? Thanks. ...more >>

I posted earlier about a problem with combining alpha values, but I have simplified the problem much more. Take a look at the red value magically changing when I try to make an exact copy of an image with near-opaque alpha values. This must be a GDI+ bug. Is there a work-around or fix? usi...more >>

Hello everyone, I've got two little apps which are able to create a window that displays something on the desktop, but are not clickable. Instead, when you click on the window, the item 'behind' or 'under' that window gets clicked. I'd like to know how to do this, using VB6, VB.Net, Windo...more >>

Hallo I have picture with a bis size as 1 MB (digital photos). I am looking for an example to reduce the file size with c#. After reducing I want store the smalll file in a database. Mybe anybody has a exaplme or idea. Thank a lot Edi ...more >>

I have a picture box with a picture in it. I place a label control over the picture control, and I set the BackColor property on the label to Transparent. And yet the Label does not show as transparent at runtime or design time. It has the standard ugly gray background. Why? What is the best s...more >>

I have tried everything, but I continue to get an outOfMemoryException that is thrown. I am really new to using GDI+, actually new to vb.net so there is hopefully something very simple that I am doing wrong. Here is the code ==== Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal ...more >>

Hello, I'm displaying some text lines on a form using DrawString, and found out that the spacing between the lines is not constant. Is there a way to space the lines equaly without calling DrawString with new coordinates for each line? TIA ...more >>