C# - Take Screenshot based on a Timer
- by APShredder
Hello everybody. I'm trying to create a WinForms app that takes a screenshot on a set interval. I think my code is correct, but when I try to run it, I get the error message "System.Runtime.InteropServices.ExternalException was unhandled, A generic error occurred in GDI+."
System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();
Thread th;
private static Bitmap bmpScreenshot;
private static Graphics gfxScreenshot;
void TakeScreenShot()
{
bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
gfxScreenshot = Graphics.FromImage(bmpScreenshot);
gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
bmpScreenshot.Save(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\ScreenCaptures", ImageFormat.Png);
th.Abort();
}
void StartThread(object sender, EventArgs e)
{
th = new Thread(new ThreadStart(TakeScreenShot));
th.Start();
}
private void Form1_Load(object sender, EventArgs e)
{
Directory.CreateDirectory(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\ScreenCaptures");
t.Interval = 500;
t.Tick += new EventHandler(StartThread);
t.Start();
}
The line that's giving my trouble is:
bmpScreenshot.Save(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\ScreenCaptures", ImageFormat.Png);
Any ideas about what is going wrong? Thanks in advance.
