Hallo I am looking for an example . I want compare two image (digital photo). If on the second picture a differnt too the first one - a operator get a error message . So mybe anyone have in c# a good example to solve this problem Thank you Edi ...more >>

Hello, I am using an axWebBrowser Active X control, and also a FlashObject Active X control. I am using VB.Net for my project. My question is this. None of the Active X controls have a mousedown, mouseup, mouseenter, etc event handlers. Is there a way that I can add these event handlers to the co...more >>

I am trying to create an explosion and/or fire affect in VB.NET. Does anyone have code or a link to help me out with this. Thanks. John ...more >>

Hi all, I'm making a graphical work surface where the user can move objects around on it, and am running into some problems which are making me despise .NET's 'psudo'-transparency. What I want to happen: There are multiple non-rectangular controls on the worksurface that are drawn from scratch i...more >>

Hi, I'm a bit confused unit measurements on VB .net If one places a "Debug.WriteLine(Me.CreateGraphics.PageUnit)" on the Load Event of a form, the result will be "Display", and if one places a "Debug.WriteLine(e.Graphics.PageUnit)" on the Paint Event of a form, the result will be "Pixels" S...more >>

I have developed a web application which does something along the following lines: string filePath = "C:\somfile.jpg"; using(System.Drawing.Image myImage = System.Drawing.Image.FromFile(filePath)) { Response.Clear(); myImage.Save(Response.OutputStream, System.Drawing.Imaging.ImageF...more >>

1. up/down arrow keys to move up/down one recored at a time 2. Page Up/Down keys to move up/down one page at a time 3. CTRL+End and CTRL+Home keys to move to end and beginning(last record and first record) of the datagrid respectively code for page down: public class Myform : System.Windo...more >>

I am trying to return the pixelformat of an image that I loaded. I keep on receiving the error message "Object reference not set to an instance of an object." on the last line. I'm not sure what I'm doing wrong. The code is below. Dim i As System.Drawing.Image i.FromFile("e:\graphics\ima...more >>

Hi all, I load 16 jpeg images of 7Kb each one in my form but when i run my application (pocket pc 2003) sometime I get outofmemory. I checked the all memory allocated for my application and is almost 20Mb. I read that even if the image is a compressed format like jpeg it can take up to 1Mb in...more >>

Hello, Any help on rendering halo text effects with GDI+? Best regards, Paul. ...more >>

I cant add any reference to the project; i did; tool -> add reference -> /net framework -> double lick on system.drawings then type imports system.drawings but it doesnt work. the reference is never added. What am I doing wrong here? Thanks!...more >>

I can't find the property in printdocument.defaultpagesettings to change the binding edge. My duplex works fine but the back side of the page is upside down. PrintDoc.DefaultPageSettings.Landscape = True PrintDoc.PrinterSettings.Duplex = Duplex.Horizontal I've also tried: PrintDoc.Defa...more >>

Is there a simple way to create a region from an image that has a transparent background? The only way I have come up with is looping through all pixels and adding those that are not transparent. Does anybody have a better solution? Thanks, Marc Selis ...more >>

I have to convert Bitmap (dot NET Bitmap) to DIB (Device Independent Bitmap). Can some one show me an example how to do this? NET Framework doesn't have any conversion functionality from Bitmap to DIB... I want to convert Bitmap to DIB in byte[] array (and later pass this to non dot NET componen...more >>

I'm trying to print using the .NET PrintDocument control, but the output is always shifted to the right by about 1/4 inch. Does anyone have any idea why this might be? The output is the same on my HP OfficeJet 7130 and HP LaserJet 4L. I'm able to reproduce this even using the following code:...more >>

I have a Calculated the path of a bitmap into the GraphicPaths object. I want to manually draw this path in a plotter fashion without using the drawpath object. What is the best way of doing this... Thanks, RB ...more >>

I am doing a drawstring with the text contents of a text box. The text box contains a string with embedded formfeeds. I'm finding the form feeds and puting out the text up until the form feed. Then setting HasMorePages to true. When I send the next part of the string, it overlays the first ...more >>

Hi, I have an icon which I want to draw as a black mask on a white bitmap. How can I do this? Martin...more >>

Hi I create a graphics path like so: GraphicsPath affectedPath = new GraphicsPath(); affectedPath.AddLine(startPoint, endPoint); And then add it to a region: affectedRegion.Union(affectedPath); But now when I try to use IsVisible to see if a point lies on that line, it will ALWAYS ...more >>

Hello, I'm working on a component written with C#. The component contains a property of type Image and loads a default image from its resource when an instance is created. When I add the component to a Form, the property grid shows the default image, but when I save the form I get an error...more >>

Hi, Would like to know how can I use SmoothingMode, PixelOffsetMode and TextContrast to improve the outcome of the GDI+ graphics (or other settings I don't know)? Basically I just want the GDI+ graphics to look better without affecting the performance (speed, resources). What is the best/o...more >>

Sorry about the repost. We are nearing release and would really like an answer on this issue: I have a managed library that contains some System.Drawing drawing code, but parts of it depend on a Managed C++ library that provides a managed interface to unmanaged drawing code. Part of the unma...more >>

I would like to change the look of an existing control (Group Box) and am confusing myself as to how to do this. All I want to do is take the existing Group Box control and change its appearance. All other functionality I wish to remain the same. Do I need to create a new class and inherit f...more >>

Hi, Im writing to find out if it is possible to read the following text written in Dax Italic using GDI function(s). Text: ÂÇÄÐÔÄ ÒÄÑÈÀË I would appreciate any advice, Cheers, Andrew --- Posted using Wimdows.net NntpNews Component - Post Made from http://www.DotNe...more >>

Hi, I'm working with web forms and graphics. I want to save a bitmap on disk. bitmap.save(FileName) respond: [ExternalException (0x80004005): Errore generico in GDI+.] System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams) +580 System.Drawin...more >>

Hi, I made a procedure which receives a Graphics parameter, and with that Graphics parameter, performs various things. The area of confusion here is that when I pass the procedure a Graphics object created by a Panel, and use the MeasureString() method, I get a different width than when I pass up...more >>

I use a LinearGradientBrush to fill a rectangle. Now I want to know what color was used on lets say pixel (5,5) in the rectangle. Is there a way to get the color without using getPixel? ...more >>

I have an owner drawn control and am simply creating an elliptical label. I have the following in the constructor: <code> SetStyle(ControlStyles.SupportsTransparentBackColor |ControlStyles.UserPaint |ControlStyles.AllPaintingInWmPaint |ControlStyles.Opaque, true); Ba...more >>

Sirs, I have an image with 2160x1440 pixel and 230 dpi. When I print it using Graphics.DrawImage I get one image of 901x601 pixels. This is exactly the result of the folowing operation: DisplayX = ImageX/ResolutionImageX*ResolutionDisplayX 901 = 2160/230*96 DisplayY = ImageY/ResolutionIm...more >>

I am using Microsoft Visual Basic .net 2002 Standard. I am coding an application which loads in data from a compressed file. One of the items in the file is a raw RGB565 bitmap, at 800x600 pixels. In a previous version of my app, I used Bitmap.SetPixel() but performance got to be an issue as it took...more >>

I remember seeing a demo years ago of a web technique in which it was possible to map out multiple irregularly shaped areas (hotspots? maps?) for use as links. Is there any way a similar effect could be created in Winforms? I already know how to create an irregularly shaped control for runtime but...more >>

This is in C#... I create a Bitmap sized to fit a form, do a Graphics.FromImage(...) on that Bitmap and draw to it. I do a bunch of arithmetic to serially compute the locations of several hundred points and use ImageList.Draw(...) to plop one of 10 images at each spot. I've set Imagelist.Trans...more >>

Hello All, I'm working in a software that captures live video from an ordinary webcam. This software has a form with a panel which is the preview window. In this panel is show a preview of what is being captured from the webcam. I wish to put a label inside this panel, but this label should ...more >>

I'm trying to save a metafile I generate to disk as a enhancemetafile but it always saves as a PNG file. I make the following call meta.Save(filename, imageformat.emf) ...more >>

Hi all, I have a need of resizing images to a thumbnail size on the fly. I have tried and used the image.getthumbnailimage api successfully. However I noticed that it doesnt maintain the aspect ratio of the original image while doing the resize. So some images do end up looking either stretched o...more >>

Hi I'm just fighting since a few days with .NET, but can't find out what is wrong in my code. I try to generate a transparent GIF, but this does not work, the background is always black.. this is my code someone can help me? patrick string sAppPath = Request.ServerVariables["APPL_PHYSICA...more >>

Hi All, I have an app that takes a multi-page TIFF produced from our fax software, and breaks it into pages and the puts each page in a row in a dataset. I had it writing to files and it worked fine. I want to have it write to memory instead. The following code runs, but on the ReadBytes l...more >>

I've writte a custom control which has a property of type RotateFlipType ( an enum from System.Drawing). Anyway, in design time when I look at the property grid for an instance of the control the dropdown list showing possible values has duplicate entries and some missing ones !!! Does anyone kn...more >>

Experienced posters, Hope I have an easy question for you. I am using the following code to draw a string; g.DrawString(BaseStartDate.ToShortDateString, New Font("Tahoma", 6, FontStyle.Bold), New SolidBrush(Color.Red), X + 2, Height - 9) My Question is how do I determine how long a stri...more >>

I am trying to load a sequence of large bitmaps (720*486) and then loop thru each pixel and convert its color space form RGB to YCbCr which is used in TV broadcasting. I'm using VB.NET. Unfortunately, the overall process came up to be real slow specially when running this on 300 frames (around 3...more >>

I'm trying to convert byte array (valid bitmap format) into some bitmaps and back to byte array again. But when I inspect the content of the array before and after the conversion they are different. I'm used the following code to do the conversion. May any of you tell me what's happening? T...more >>

Hiya! I'm currently looking for a good image processig component (classes) to use in a project. I do not want to controls (winform or webform) since I will be doing this with code. I actually do not need my image processing functionality, mainly * Resizing * Cropping My main n...more >>

I have a map of my local state and I have a feed I receive on a regular basis (the feed consists of XML data that gives me geographic coordinates that I store in my database). We are switching to .NET and we want to make this real time and available on the web for our remote people to view. I ...more >>

I've got an application that allows the end user to draw on an image (lines, rectangles, ellipses and freehand). The images can be pretty big, they're taken with a 5mp camera. The drawing works but lags behind the mouse movements, I've read some posts that suggest caching and other ways to speed ...more >>

I'm having problems with converting a byte array to an image object~ My byte array is an picture in VB6 StdPicture format. I've used propertybag to convert the picture into base64Array format in XML, and embedded the array as some child element in an xml file, i.e.: <Mask>bHQAAH4AAABCTX4AAA...more >>

I am making a user control. It has a Hscrollbar, and a label. and I have a piece of code that links them together as - private void hScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) { label1.Text = hScrollBar1.Value.ToString() ; } (Also the relevant event ha...more >>

BlankI'm having the following problems with auto scroll bars = appearing/disappearing on a panel on which I draw different primitives = (drawn using Bob Powell's code as a base). The panel class and scroll = bar handling routine are listed below. I call the latter routine = whenever a primitive ...more >>

Hi I was wandering if anyone knew if it was possible to add custom EXIF tags (such as Photographer and Title) to a JPEG image, or to modify the existing tags (such as ImageDescription). There is an extremely good article on Code Project for reading these tags, but I cannot find any informat...more >>

I'm probably doing something silly here but it seems to me that the Picturebox control in StretchImage mode (and Graphics.DrawImage too for that matter) is interpolating with an "extra" white pixel on the right and bottom of the image. If you try this, you get a rather surprising result - the ima...more >>

Hi All, How to select a circular area from an image in .NET. regards Suresh .. ...more >>