Initializes a new instance of the Bitmap class from the specified data stream.
(in System.Drawing.dll)
Visual Basic (Declaration)
Public Sub New ( _
stream As Stream _
)
Dim stream As Stream
Dim instance As New Bitmap(stream)
public Bitmap(
Stream stream
)
public:
Bitmap(
Stream^ stream
)
public function Bitmap(
stream : Stream
)
| Exception | Condition |
|---|
| System..::.ArgumentException |
stream does not contain image data or is nullNothingnullptra null reference (Nothing in Visual Basic). -or-
stream contains a PNG image file with a single dimension greater than 65,535 pixels. |
You must keep the stream open for the lifetime of the Bitmap.
Due to a limitation of the GDI+ decoder, an System..::.ArgumentException is thrown if you construct a bitmap from a .png image file with a single dimension greater than 65,535 pixels.
The following code example demonstrates how to load a bitmap from a stream.
This example is designed to be used with Windows Forms. Create a form that contains a PictureBox named PictureBox1. Paste the code into the form and call the InitializeStreamBitmap method from the form's constructor or Load event-handling method.
Private Sub InitializeStreamBitmap()
Try
Dim request As System.Net.WebRequest = _
System.Net.WebRequest.Create( _
"http://www.microsoft.com//h/en-us/r/ms_masthead_ltr.gif")
Dim response As System.Net.WebResponse = request.GetResponse()
Dim responseStream As System.IO.Stream = response.GetResponseStream()
Dim bitmap2 As New Bitmap(responseStream)
PictureBox1.Image = bitmap2
Catch ex As System.Net.WebException
MessageBox.Show("There was an error opening the image file. Check the URL")
End Try
End Sub
private void InitializeStreamBitmap()
{
try
{
System.Net.WebRequest request =
System.Net.WebRequest.Create(
"http://www.microsoft.com//h/en-us/r/ms_masthead_ltr.gif");
System.Net.WebResponse response = request.GetResponse();
System.IO.Stream responseStream =
response.GetResponseStream();
Bitmap bitmap2 = new Bitmap(responseStream);
PictureBox1.Image = bitmap2;
}
catch(System.Net.WebException)
{
MessageBox.Show("There was an error opening the image file."
+ "Check the URL");
}
}
void InitializeStreamBitmap()
{
try
{
System::Net::WebRequest^ request = System::Net::WebRequest::Create( "http://www.microsoft.com//h/en-us/r/ms_masthead_ltr.gif" );
System::Net::WebResponse^ response = request->GetResponse();
System::IO::Stream^ responseStream = response->GetResponseStream();
Bitmap^ bitmap2 = gcnew Bitmap( responseStream );
PictureBox1->Image = bitmap2;
}
catch ( System::Net::WebException^ )
{
MessageBox::Show( "There was an error opening the image file."
"Check the URL" );
}
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
Reference
Other Resources