Image.PixelFormat 属性

获取此 Image 的像素格式。

**命名空间:**System.Drawing
**程序集:**System.Drawing（在 system.drawing.dll 中）

语法

声明
Public ReadOnly Property PixelFormat As PixelFormat
用法
Dim instance As Image
Dim value As PixelFormat

value = instance.PixelFormat

public PixelFormat PixelFormat { get; }

public:
property PixelFormat PixelFormat {
    PixelFormat get ();
}

/** @property */
public PixelFormat get_PixelFormat ()

public function get PixelFormat () : PixelFormat

属性值

PixelFormat，表示此 Image 的像素格式。

示例

下面的代码示例演示了如何使用 GetPixel 和 SetPixel 方法从文件构造新的位图，为图像重新着色。该示例还使用 PixelFormat 属性。

此示例旨在用于包含名为 Label1 的 Label、名为 PictureBox1 的 PictureBox 和名为 Button1 的 Button 的 Windows 窗体。将代码粘贴到该窗体中，并将 Button1_Click 方法与按钮的 Click 事件关联。

Dim image1 As Bitmap

Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

    Try
        ' Retrieve the image.
        image1 = New Bitmap( _
            "C:\Documents and Settings\All Users\Documents\My Music\music.bmp", _
            True)

        Dim x, y As Integer

        ' Loop through the images pixels to reset color.
        For x = 0 To image1.Width - 1
            For y = 0 To image1.Height - 1
                Dim pixelColor As Color = image1.GetPixel(x, y)
                Dim newColor As Color = _
                    Color.FromArgb(pixelColor.R, 0, 0)
                image1.SetPixel(x, y, newColor)
            Next
        Next

        ' Set the PictureBox to display the image.
        PictureBox1.Image = image1

        ' Display the pixel format in Label1.
        Label1.Text = "Pixel format: " + image1.PixelFormat.ToString()

    Catch ex As ArgumentException
        MessageBox.Show("There was an error." _
            & "Check the path to the image file.")
    End Try
End Sub

Bitmap image1;

private void Button1_Click(System.Object sender, System.EventArgs e)
{

    try
    {
        // Retrieve the image.
        image1 = new Bitmap(@"C:\Documents and Settings\All Users\" 
            + @"Documents\My Music\music.bmp", true);

        int x, 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 = "Pixel format: "+image1.PixelFormat.ToString();

    }
    catch(ArgumentException)
    {
        MessageBox.Show("There was an error." +
            "Check the path to the image file.");
    }
}

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." );
      }

   }

private Bitmap image1;

private void button1_Click(Object sender, System.EventArgs e)
{
    try {
        // Retrieve the image.
        image1 = new Bitmap("C:\\Documents and Settings\\All Users\\"  
            + "Documents\\My Music\\music.bmp", true);

        int x, y;

        // Loop through the images pixels to reset color.
        for (x = 0; x < image1.get_Width(); x++) {
            for (y = 0; y < image1.get_Height(); y++) {
                Color pixelColor = image1.GetPixel(x, y);
                Color newColor = Color.FromArgb(pixelColor.get_R(), 0, 0);

                image1.SetPixel(x, y, newColor);
            }
        }

        // Set the PictureBox to display the image.
        pictureBox1.set_Image(image1);

        // Display the pixel format in label1.
        label1.set_Text("Pixel format: " 
            + image1.get_PixelFormat().ToString());
    }
    catch (ArgumentException exp) {
        MessageBox.Show(("There was an error."  
            + "Check the path to the image file."));
    }
} //button1_Click

平台

Windows 98、Windows 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

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

Image 类
Image 成员
System.Drawing 命名空间