Bitmap Constructor (String^, Boolean)

 
System_CAPS_noteNote

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Initializes a new instance of the Bitmap class from the specified file.

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

public:
Bitmap(
	String^ filename,
	bool useIcm
)

Parameters

filename
Type: System::String^

The name of the bitmap file.

useIcm
Type: System::Boolean

true to use color correction for this Bitmap; otherwise, false.

Use this constructor to open images with the following file formats: BMP, GIF, EXIF, JPG, PNG and TIFF. For more information about supported formats, see Types of Bitmaps. The file remains locked until the Bitmap is disposed.

The following code example demonstrates how to construct a new bitmap from a file. The example uses the GetPixel and SetPixel methods to recolor the image. It also uses the PixelFormat property.

This example is designed to be used with a Windows Form that contains a Label, PictureBox and Button named Label1, PictureBox1 and Button1, respectively. Paste the code into the form and associate the Button1_Click method with the button's Click event.

private:
   Bitmap^ image1;
   void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      try
      {

         // Retrieve the image.
         image1 = gcnew Bitmap( "C:\\Documents and Settings\\All Users\\"
         "Documents\\My Music\\music.bmp",true );
         int x;
         int y;

         // Loop through the images pixels to reset color.
         for ( x = 0; x < image1->Width; x++ )
         {
            for ( y = 0; y < image1->Height; y++ )
            {
               Color pixelColor = image1->GetPixel( x, y );
               Color newColor = Color::FromArgb( pixelColor.R, 0, 0 );
               image1->SetPixel( x, y, newColor );

            }

         }

         // Set the PictureBox to display the image.
         PictureBox1->Image = image1;

         // Display the pixel format in Label1.
         Label1->Text = String::Format( "Pixel format: {0}", image1->PixelFormat );
      }
      catch ( ArgumentException^ ) 
      {
         MessageBox::Show( "There was an error."
         "Check the path to the image file." );
      }

   }

SecurityPermission

for calling into unmanaged code. Related enumeration: UnmanagedCode

.NET Framework
Available since 1.1
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