system.drawing

I have developed a GUI test framework that does integrationtesting of our company website on a scheduled basis. When something fails, it'll take a screenshot of the desktop, among other things. This runs unattended on a logged in user on a dedicated Windows Server 2008. The problem is that taking a screenshot on a desktop that I have disconnected my remote desktop session from. I get the following exception: System.ComponentModel.Win32Exception (0x80004005): The handle is invalid at System.Drawing.Graphics.CopyFromScreen(Int32 sourceX, Int32 sourceY, Int32 destinationX, Int32 destinationY,

I have updated my project from .NET 4.5 to .NET Core (with ASP.NET Core). I had some very simple code in my previous version that used the bitmap object from System.Drawing to resize an image. As I understand System.Drawing cannot be used in .NET Core because it is not cross platform, but what can be used instead? I have googled this and cannot find anything. The only thing I can find is this post, which has no code on it what so ever. Disclaimer: This is my software. I'm working on a cross-platform 2D Graphics library that runs on .NET Core It's currently alpha but already supports a

I have a icon which has a few different sizes (16px, 32px, 64px). I am calling ToBitmap() on it, but it is always returning the 32px image. How do I retrieve the 64px one? This is a fairly painful limitation in the ResourceManager class. Its GetObject() method doesn't provide a way to pass extra arguments that would allow selecting the returned icon by size. A workaround is to add the icon to the project instead. Use Project + Add Existing Item, select your .ico file. Select the added icon and change the Build Action property to "Embedded Resource". You can now retrieve the desired icon with

i want to draw a line on a bmp image which is pass into a method using drawline method in C# public void DrawLineInt(Bitmap bmp) { Pen blackPen = new Pen(Color.Black, 3); int x1 = 100; int y1 = 100; int x2 = 500; int y2 = 100; // Draw line to screen. e.Graphics.DrawLine(blackPen, x1, y1, x2, y2); } this give a error.So i want to know how to include paint event here (PaintEventArgs e ) and also want to know how to pass parameters when we calling drawmethod? example DrawLineInt(Bitmap bmp); this give the following error "The name 'e' does not exist in the current context " "Draw a line on a bmp

I am working on to upload and save a thumbnail copy of that image in a thumbnail folder. I am using following link: http://weblogs.asp.net/markmcdonnell/archive/2008/03/09/resize-image-before-uploading-to-server.aspx but newBMP.Save(directory + "tn_" + filename); is causing exception "A generic error occurred in GDI+." I have tried to give permission on folder, also tried to use a new separate bmp object when saving. Edit: protected void ResizeAndSave(PropBannerImage objPropBannerImage) { // Create a bitmap of the content of the fileUpload control in memory Bitmap originalBMP = new Bitmap