Export (0) Print
Expand All
3 out of 3 rated this helpful - Rate this topic

Bitmap.Bitmap(Stream) Constructor

Initializes a new instance of the Bitmap class from the specified data stream.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

public Bitmap (
	Stream stream
)
public Bitmap (
	Stream stream
)
public function Bitmap (
	stream : Stream
)
Not applicable.

Parameters

stream

The data stream used to load the image.

Exception typeCondition

System.ArgumentException

stream does not contain image data or is a 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 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");
    }
}

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.set_Image(bitmap2);
    }
    catch (System.Net.WebException exp) {
        MessageBox.Show(("There was an error opening the image file." 
            + "Check the URL"));
    }
} //InitializeStreamBitmap

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft. All rights reserved.