Hi I have painting my own stuff on a Panel object, which has AutoScroll property set to true. Please somebody help me how do I hook to OnHScroll and OnVScroll events of the scroll bars. These scroll bars or even their events are not exposed. I guess I am being daft or is it an oversight on the...more >>

Hi @all, I just don't know what I have to use to get the performance. Hope you can help me... I should program a visio like GUI. The graphics plane is presented in 2D. But zooming must be implemented without pixeling. My first attemp was the GDI+ Lib. Everything worked fine, but the pe...more >>

Hi, Does anyone know how to change a "Component Opacity"? I mean, if i want to use a RichTextBox, there's no Opacity property. If i set it's BackColor to Color.FromArgb(75,255,255,255) for example, it just keep telling me that it doesn't support Transparency. If i create my own user ...more >>

Hello I have seen in the DotNet Documentation that it coult be possible to choose the algorithm when we resize an image (JPEG format). Could you give me an example ?... Thanks ! Cedric, France ...more >>

Hello, I'm new at printing from applications. My app reads a textfile and tries to print it. The printing works, but I have tabs in my textfile and the printed page doesn't have the same tabs. I searched with google, but didn't find anything. Am I overlooking something? thanks. Niels...more >>

I need to make a component tha would look up an www address and create a image file of that web page. For example: Input: www.gotdotnet.com Output: a printscreen .jpg file of this web page. Has anyone any ideas? Thanks ...more >>

Hi all, I´m trying to generate thumnails of pictures into an ASP.NET page. The process is: the user search in a images database and I show the results as a gallery like ACDSee. I have BMP, JPG, GIF, TIFF and WMF. To generate thumnails I use one page "LoadImage.aspx" that returns a BinaryStre...more >>

Hi Bob, I seem to recall seeing in a signature line on one of your posts something about "trying your book". Do you have a book on graphics published? If so can you provide some details on it? Thanks, Chris -- If you don't like lunchmeat, please remove it from my e-mail addres...more >>

I am building a control that is light rendering on a rotating ball that moves as the mouse moves which means each time the mouse moves each pixel in the control can change. I have this in a bitmap using the SetPixel command and it is working great except for Jagged Edges on the outside of...more >>

Hello all, I am developing an ASP.NET applicattion that is a Image Database Catalog, the images are of various types including BMP,GIF,JPEG,... and WMF. When the user search for images i show a gallery of results generating thumbnails whit GetThumbnail method of the image class. It runs ok wit...more >>

Hi I am looking for an algorithm which can help me render a graph efficiently on the canvas. My graph is a dynamic network of interconnected nodes. Each node can connect to one or more nodes. The algorithms should be able to place the nodes on a 2D plane in such a way that the there is a minim...more >>

Hi I want to draw piechart, and have to compute regions that FillPie function fills (i have to have coordinates of that regions, not only fill them) once i am using square as a bounding box all works ok, but when i switch to ellipse (to draw 3D mode pie chart), it is a bit strange, ple...more >>

I am loading a gif with alpha transparency that was created in fireworks. I have the ability to change the matte in fireworks so the edge matches whatever background it will be placed on. My question is: how can I duplicate this matte behavior in c#? I would like to dynamically change the mat...more >>

Hi, =20 I just read this article about double buffering in GDI+ : =20 http://windowsforms.net/articles/windowsformspainting.aspx =20 He shows how to double buffer with this kind of code: =20 //create our offscreen bitmap Bitmap localBitmap =3D new = Bitmap(ClientRectangle.Width,ClientRecta...more >>

Hi, I wrote a sample C# code for printing. I want to print multiple copies = of the same document, where the num of copies are to be specified by = user. Here is my code snippet. When I made a QuickWatch = dlg.PrinterSettings in filePrintMenuItem_Click(), it shows the copies = =3D 1 always, eve...more >>

I know there have been many posts on this topic, and I have looked at them but I am still having problems. I am trying to load from a jpeg image and then save back to the same filename, I can load the image without any problem, once loaded I can delete the original file (so it is not a locking...more >>

Forgive me, I'm a graphics newbie. I'm trying to programmatically create a bitmap image with a hex (#9EBADC) color as the background. I have written out to the file using SetPixel but the output looks grainy and on edit with Photoshop it doesn't really even contain the color. Here's the cod...more >>

Does the Image.FromStream function keep the image uncompressed? I am loading a multipage tiff file, then i have a function that splits all the pages into an image array. Now the size occupied in memory of the array compared to the mTIFF file is huge. I would say the growth is exponentia...more >>

Dear sir, did u find any soln for drawimage in paint Vs DrawImage in CreateGraphics() Regards Hari...more >>

Hello, I asked the same question in the general dotnet group but got no answer there so I'm trying it again here. I'm having a YUV file (4:2:0 format) that I want to play. Problem is that mediaplayer and directx doesn't seem to recognize the YUV-format and fail to play it. Does somebody k...more >>

A tricky question: Think a blue Panel object. We create a graphicspath obj and add a polygon which is three points = triangle GraphicsPath gp =3D new GraphicsPath(); PointF[] pp =3D {new PointF(30,30), new PointF(30,60), new = PointF(60,40}; gp.AddPolygon(pp); After that w...more >>

I have a picturebox that can be resized at runtime and when both the height and the top change the control flickers. I am double buffering the control and using AllPaintingInWmPaint | DoubleBuffer | UserPaint but it is not helping. Thanks in advance, ~Logan ...more >>

Hi Do anybody know how to show ActiveX whitout AxHost? For example i got wrapper to ActiveX and now i don't know how AxHost shows ActiveX. I must do it, because i think AxHost made it wrong and i got some problems with using ActiveX. Second question is how AxHost do it? I mean how he show...more >>

I think Tiff is the preferred format, but anything that correctly preserves the CMYK colors will work. I have looked but can not find any useful information on imageattributes. No examples or anything. Do you know of anywhere that could fill me in a little more on the solution you suggested b...more >>

Hello, I'm drawing a simple shape at runtime on my form, with the following code for example: Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.Yellow,50,50,150,150); g.Dispose(); The rectangle displays on the form of course, but when I minimize the form and after ...more >>

This is probably a really stupid question but what is the difference between pixels and points. How do you convert from pixels to points? EG 300 pixels = ??? points ...more >>

I have spent tremendous amounts of time looking for examples that might do this. There has to be a way. I have managed to BitBlt the control successfully but if something obstructs the control... it gets included also. Anyone have a solution to this?...more >>

All, I'm using the following code to resize a jpg automatically. Every image I produce is at 96dpi, which is the display settings for the monitor. I proved this by increasing to 110dpi and the code then produced the thumbnail at 110dpi. Can I override this? Thanks in advance. Bitmap bm=(B...more >>

On certain HP printers (720C and 1150C) on Windows 98 I get the following error when I try to query printer settings: Does anybody know how to get around this or what is causing it? I get it on the 1.0 and 1.1 Framework? invalid page fault in module HPMWINXC.DLL at 0011:00003c83. Regi...more >>

Im trying to do a BarGraph, so each second i draw a new value (just a small rectangle as a bar) on the right of a Panel. My question is, that each second i have to move the actual drawed picture in the panel 3 pixels to the left, so i leave space for the new bar that i have to add How do i do tha...more >>

I'm making some custom controls which basically are Charts, line chart and bar chart They are working fine with GDI+, with some small flicks but its nothing to worry I'm kind a newbie on this scene, the way I did it was using a Panel control and in the Paint event I draw some lines, boxes, using...more >>

Does anyone have any opinion about this book: ".NET Graphics and Printing" Peter G. Aitken ISBN 1931097043 http://www.amazon.com/exec/obidos/ASIN/1931097046/ Can someone new to both Windows graphics and .NET pick up both at the same time using this book? I am particularly interested i...more >>

Hi I have two windows that overlap (with the "child" window overlapping the "parent" window, both of which are non-rectangular and have custom regions). What I want to do is modify the window region of the child window just before it is shown to exclude the part that overlaps with the parent ...more >>

Hello, Can someone point me to some example code that shows how to paint the text in a button control. I basically want to reposition the text so it does not wrap. Thanks...more >>

Greetings all. I have .NET service which takes a series of images, draws on them with the drawing objects, then sends them in one print job with multiple pages (up to 15pages) to a printer. This was not a trivial excercise - thanks to any folks reading this who responded to my previous post...more >>

Hi Guys.. I've been going crazy for two days now, and I feel I'm very close. I've got a DLL that returns a HANDLE to a DIB (GDI). I've retrieved the BITMAPINFO structure, created a Bitmap and locked the bits. However, when I try and copy the data in, I always get an unhandled exception. I've ...more >>

Hi All, Trying to create a customlinecap as the standard line caps for a pen object are drawn very small and there doesnt seem to be a way of making them bigger! When creating a custom line cap (see code below), an error 'Not Implemented' is returned. Whats the deal here? Also see prev...more >>

i have the following code to generate a gif (http://www.attilanet.com/textattilanet.gif) .. the text looks dirty and when you zoom in you can see the different colors that make it dirty. what else do i need to do in order to make the text cleaner? //Temp Bitmap Bitmap bmpTempText = new B...more >>

Would anyone know how to control the display size for multiple image/jpeg files to a windows form or asp.net picture box control? The .jpeg files should position or display side by side. I can pull attachments into a Picture Box, however I have no control of its display size or positions...more >>

Can anyone show me how to change font type and font size when I print to a surface??? I use direct 9 and vb.net. Private back As Surface = Nothing public sub ... backB.ColorFill(Color.Blue) backB.DrawText(n, 100, "sasasasa", False) end sub thanks...more >>

This is gonna drive me crazy. I want a flat combobox. I've been through several examples, all written in C#, which I don't understand that well. Most don't subclass the combo, but I need all the ComboBox's functionality.. Conceptually, I'm thinking I should subclass a ComboBox, override som...more >>

I am trying to get a simple image editing program I am writing in VB.NET to access the information from a Compact Flash Card in Windows XP. Windows Explorer sees the Removable Media just fine and even reads the EXIF data too. But, the OpenFile Dialog in VB.NET does not see it at all. Is ther...more >>

i don't know if this is the group for this question, but here it is: i'd like to enlarge the width of the verical scroolbar in a control like listbox or combobox or datagrid. I searched a lot about a solution in C# or VBNET but i found nothing. Is there a resonable way to do this ? Thanks i...more >>

I'm am trying to use the DashStyle members from the GDI+ API but I keep getting the error: c:\myPrograms\tests\c\i\main.cpp(260): error C2065: 'DashStyleSolid' : undeclared identifier and: c:\myPrograms\tests\c\i\main.cpp(260): error C2039: 'DashStyleSolid' : is not a member of 'Gdiplus...more >>

This is in an ASPX page but I've included references for System.Windows.Forms to have access to the controls I need: I'm trying to create a bitmap render of an error message captured when display of an image fails. The code which follows compiles and executes but the returned image always is ...more >>

I have an ASP/VB6/COM+ application which uses the Kodak Imaging components (which are pretty bad to work with) to strip a multipage tiff (from a fax server) down to a single page and then converted to JPG and streamed to a browser by means of a Response.BinaryWrite. Basically we have a page with...more >>

Hi All, Apologies if this post appears more than once, wonderful ie6 crashed on me as I was submitting the last post. I have to implement drawing grid onto a graphics object, using suppied parameters - the problem is that it is very slow and adversely affects performance to an unacceptab...more >>

Hi, I have the original bounds and center of an object, the matrix, and the final points. What is the best way to get the rotation, scales, skews that have been applied (from the Matrix.Elements I assume)? Right now I'm trying to reverse it, first taking off the translation, then the shear x a...more >>

Dear Sir, Did u get the screen shots i've sent. hari...more >>

Hi, I know that in C#, destructor is a finalize method. This means that the destructor is only called when the Garbage collector does it job. But the the GC is always does it job when the memory is full. Is there any thing wrong ? If it is true, now we consider GDI object (such as Image, Grap...more >>