Hi, Recently I stummbled on an unexpected, weird behavior of Graphics.DrawLine method. This is an example code : Bitmap bmp = new Bitmap(100, 100); Graphics g = Graphics.FromImage(bmp); Point p1 = new Point(int.MaxValue, 0); Point p2 = new Point(0, 0); g.DrawLine(Pens.Black, p1, p2); g....more >>

I've a byte array containing a gif. I need a test to be sure the image is a gif and not a jpg or other format. I try to check this via bitmap.rawformat property, but I cannot. This is my code: Dim stream As New System.IO.MemoryStream(bytesImage) Dim image As New System.Drawing.Bitmap(Draw...more >>

Hi guys I'm trying to save my drawing (lines and rectangles)on a picture box as an bmp file but I got an error which complains something "Object reference not set to an instance of an object" How do I initiate an instance of my object outside my paint event? Could anyone give me some sugges...more >>

Well, I found that by creating a Bitmap from a file using the constructor it places a lock on the file. How do I get around this as mentioned in http://support.microsoft.com/?id=814675? I have an indexed image source. I couldn't find any solution to do this. It's very obscure. I would...more >>

Platform VS.NET 2003, ASP.NET, VB.NET I have quite a few (159) array of points in my code behind that define and draw county boundries of a State Map using the drawpolygon method. I have 2 arrays listed below to provide an example. My idea is to have the regions dynamically change color based on...more >>

Hi again.. And how can I Trim a rect object? Regards Palli ...more >>

hi, We are currently porting our project from VB6 to VB .NET. Earlier we used to make scale transformations on objects like pictureBox , forms etc.Now Such transformations are made on the graphics object of the form/pictureBox. Should It be better if make a graphics object from my picture...more >>

Hi I made a simple app in VS.NET 2003 and C# to draw bitmap on form inside OnPaint event. I added timer to repaint the form every 10ms by calling this.Invalidate within timer event. When I run the app and move the cursor around the screen (This only happens if I move the cursor), when form ...more >>

What is the fastest way to draw lines? I need to draw a maximum of 100000 simple lines on the screen, my computer does this in 0.6sec but that is far too slow. I tried to mess around with the properties of the graphics object, but it turned out that the defualt ones are the fastest ones. Im d...more >>

I want to write custom control inheriting button control. In my custom control I want to display the text on button after the image set for button event though the imagealign and textalign are set to middleleft. Any help please. Thanks -------------------------------- From: Bhagvan Chougule --...more >>

I am adding watermark text to an image uploaded to my web site, following the walkthrough here: http://www.codeproject.com/useritems/TransparentImageWatermark.asp (except I'm doing this in C#). The sequence of events is this: Image image = Image.FromFile(filePath); //Loads the file into me...more >>

Hello, In my old win32 app I used to use SetWindowExt/SetViewportExt/SetWindowOrg/SetViewportOrg to do some translations. I notice that dotnet's Graphics object transformations aren't that sophisticated so I have a workaround which would work if I could create a "memory" Graphics context ...more >>

Hi folks, I have an image that is drawn into a panel. The printable area of that image will be represented by a rubberband (-rectangle) which is drawn on top of that image. To further clarify that, I'm Xor'ing the regions of both the image and the rubberband so that the area outside of the rub...more >>

Hi I cant manage to print on a custom sized paper. I set up the margins and paper size using: PrintDocument printDoc = new PrintDocument(); printDoc.DefaultPageSettings.PaperSize = new PrinterSize("Test", 413, 682); printDoc.DefaultPageSettings.Margins = new Margins(50,50,50,50); .... In...more >>

Hi folks, using Transform (see i.e. www.bobpowell.net/bestfit.htm) I'm drawing a scaled version of an image onto a panel (s.b. for my code). Any pointers as to how to get the size and position as it will be drawn after the transform? Using something like this (with the code at the botto...more >>

Hi, I created a custom control and drawing it's border depending on the selection of BorderType... The border can also have different shapes such as Round, Circle, Rectangle, etc... When I draw this border, I first create a GraphicsPath outlining the border and than drawing the path u...more >>

Hi, how can I to retrieve the system fonts folder ? or, better, from fontname how can I retrieve the font file complete path ? For example, having a "Tahoma" fontname, I would like to get the complete path of the file installed on the system ("c:\windows\fonts\tahoma.ttf"). Thanks ...more >>

Hi NG, i have some problems with the paint methode: 1. When i move the mouse fast, the paint methode (DrawRectanlge), will not paint fine. I can see a lot of fragments of the old frame. What's wrong? 2. Can i paint an 'active' Frame like ants? 3. What must i do, to paint the rest of the grap...more >>

Hi, I will have access in a few days to a JPEG 2000 compression HARDWARE device which is not quite ready for retail sale. However, I have 3 queries for those of you interested in the capability. 1) Would you be interested in a WEB based portal service which provides click charge fee for JP...more >>