"Parameter is not valid." in System.Drawing.Bitmap

Abdulmajeed Alshari

I built simple application to take full screenshot each 100ms of computer's screen and set the screenshots on the PictureBox :

private void StartWork()
{
try
{
// width :1916 and height :1074 is the best measure to take full screenshot of whole laptotp's screen
using (Image bitmap = new Bitmap(1916, 1074))
{
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(Point.Empty, Point.Empty, new Size(1916, 1074));
}
pictureBox1.BackgroundImage = (Image)bitmap.Clone();
pictureBox1.BackgroundImageLayout = ImageLayout.Stretch;
//Sending Function to Send every token screenshot to all connected TcpClients
// Sending(bitmap);
pictureBox1.Invalidate();
pictureBox1.Refresh();
}
}
catch (Exception ee)
{
// MessageBox.Show(ee.Message);
}
}

calling StartWork() in every 100ms in Tick event :

private void timer1_Tick(object sender, EventArgs e)
{
StartWork();
}

it is run well and i see the screenshots appears on PictureBox one after one but after several seconds I am facing this exception :

Data = {System.Collections.ListDictionaryInternal}

HResult = -2147024809

Message = "Parameter is not valid."

Source = "System.Drawing"

StackTrace = " at System.Drawing.Graphics.GetHdc()\r\n at System.Drawing.Graphics.CopyFromScreen(Int32 sourceX, Int32 sourceY, Int32 destinationX, Int32 destinationY, Size blockRegionSize, CopyPixelOperation copyPixelOperation)\r\n at System.Drawing.Graphics.CopyF...

TargetSite = {IntPtr GetHdc()}

I was searched in simillar problems in CSharp Corner and Stackoverflow and try to change a lot of things but really i becommed tired.

please developers how solve this problem .

Thanks in Advance .

4 Replies

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Abdulmajeed Alshari6y ago

My problem was solved. just I removed the code at line 13 and change the code at line 12 as the follow:

pictureBox1.BackgroundImage = bitmap;

but now i try uncomment the code at line 15 to Sending the every screenshot to all connected tcpClient this Sending(bitmap); as the follow:

private void Sending(Image file)
{
using (Image bitmap = file)
{
dataForm = new DataForm();
dataForm.SenderName = "Server";
dataForm.ContentType = "File";
dataForm.bitmap = (Bitmap)bitmap;
// Send The Picture to all Joined Client
for (int i = 0; i < joinedClients.Count; i++)
{
using (NetworkStream ns = Sockets[joinedClients[i]].GetStream())
{
Content content = Mapper.Serialize(dataForm);
ns.Write(content.Data, 0, content.Data.Length);
}
}
}
}

and then i am facing new exception its detials as the follow :

'Parameter is not valid.'

	Name	Value	Type
	StackTrace	" at System.Drawing.Image.get_Flags()\r\n at System.Windows.Forms.ControlPaint.IsImageTransparent(Image backgroundImage)\r\n at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)\r\n at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)\r\n at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)\r\n at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)\r\n at System.Windows.Forms.Control.WmPaint(Message& m)\r\n at System.Windows.Forms.Control.WndProc(Message& m)\r\n at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)\r\n at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)\r\n at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)"	string

Abdulmajeed Alshari6y ago
I am using .NET Framework 4.6.1
namespace called Server Application it is project name and pictureBox1 proberties that i changed are (BackgroundImageLayout : Stretch, SizeMode : StretchImage, Anchor : Top,Left, Dock : Left and Size : 1164, 711)
+1
Sachin Singh6y ago
which version of .Net are you using???
There's a bug in the .NET V2.0 SP1 and .NET 3.5 version of CopyFromScreen(). It leaks a handle, after a while you'll run out available handles and get weirdo error messages like this
+2
Junaid Musla6y ago
Hi,

Can you specify the type and namespace of pictureBox1 property ?
+1