Question:

I have a server-client application, i want to get a Screen Shot from server,but on the line <br />bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);<br /> i get this exception : A generic error occurred in GDI+.

private Socket ScreenSocket; private MemoryStream ms; public void ConnectScreenShot(IPEndPoint ep) { if (ScreenSocket != null) { ScreenSocket.Dispose(); ScreenSocket = null; } if (ms != null) { ms.Dispose(); ms = null; } ScreenSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); ScreenSocket.Connect(ep); ms = new MemoryStream(); Rectangle bounds = Screen.GetBounds(Point.Empty); using (Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height)) { using (Graphics g = Graphics.FromImage(bitmap)) { g.CopyFromScreen(Point.Empty, Point.Empty, bitmap.Size); } bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); } }

Why is that happening and how would i fix it?

<strong>Update:</strong> It works when i use ImageFormat.Jpeg Instead of ImageFormat.Png, but i still need a PNG format.

You say:

<blockquote>

i want to get a Screen Shot from server

</blockquote>

And the error being GDI+ related suggests that the context under which this code is being run is perhaps a service context (such as IIS), and not a desktop. Is that correct? If so, what do you expect to return in a screenshot?

For the record, the following (minimal) code works fine:

var ms = new MemoryStream(); Rectangle bounds = Screen.GetBounds(Point.Empty); using (Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height)) { using (Graphics g = Graphics.FromImage(bitmap)) { g.CopyFromScreen(Point.Empty, Point.Empty, bitmap.Size); } bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); }

Both bitmap and ms contain the data expected. As such, I think you need to provide information on where and in what this code is running.

For me I was using the Image.Save(Stream, ImageCodecInfo, EncoderParameters) and apparently this was causing the infamous A generic error occurred in GDI+ error.

I was trying to use EncoderParameter to save the jpegs in 100% quality. This was working perfectly on "my machine" (doh!) and not on production.

When I used the Image.Save(Stream, ImageFormat) instead, the error disappeared! So like an idiot I continued to use the latter although it saves them in default quality which I assume is just 50%.

Hope this info helps someone.

I know this is an old post, but I wanted to add this information as well, in case someone like me runs across this issue in the future..

I wasn't able to save .PNG images and it because the IIS App Pool Account didn't have access to this, key.

HKEY_CLASSES_ROOT\CLSID{FAE3D380-FEA4-4623-8C75-C6B61110B681}

Which is required when you use png graphics.

it worked with me this way :

<ul><li>

When a client wants to a receive a screenshot, you need to know image size before transferring starts. <br />Call GetScreenShotSize() to get the size of the image.

</li> <li>

Once you get the size, call GetScreenShot() to receive image data.

</li> </ul>

i used using (MemoryStream ms = new MemoryStream()) so now PNG format is working.

private Image img = null; public long GetScreenShotSize() { Rectangle bounds = Screen.GetBounds(Point.Empty); using (Bitmap bmp = new Bitmap(bounds.Width, bounds.Height)) { using (Graphics g = Graphics.FromImage(bmp)) { g.CopyFromScreen(Point.Empty, Point.Empty, bounds.Size); } using (MemoryStream ms = new MemoryStream()) { bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png); img = Image.FromStream(ms); return ms.Length; } } } public void GetScreenShot(IPEndPoint ep) { using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)) { socket.Connect(ep); using (MemoryStream ms = new MemoryStream()) { img.Save(ms, System.Drawing.Imaging.ImageFormat.Png); socket.Send(ms.ToArray(), SocketFlags.None); } img.Dispose(); img = null; } }

abrirConexion(); cmd = new SqlCommand(" INSERT INTO [SICRE_BI].[Credito_CCSS].[bi_img](Descripcion,img) VALUES (@nom_img,@img)",cn); cmd.Parameters.Add("@Descripcion", SqlDbType.NChar); cmd.Parameters.Add("@img", SqlDbType.Image); cmd.Parameters["@Descripcion"].Value = descripcion; System.IO.MemoryStream ms = new System.IO.MemoryStream(); pbImagen.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);//Aqui se me cae.Aqui se me cae.Aqui . cmd.Parameters["@img"].Value = ms.GetBuffer(); //ms.GetBuffer(); cmd.ExecuteNonQuery(); return true;