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Bitmap Constructor (Stream)

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
)

Parameters

stream
Type: System.IO.Stream
The data stream used to load the image.

ExceptionCondition
System.ArgumentException

stream does not contain image data or is null.

-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");
    }
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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