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RegionData Class

Encapsulates the data that makes up a Region object. This class cannot be inherited.


Namespace:  System.Drawing.Drawing2D
Assembly:  System.Drawing (in System.Drawing.dll)

public sealed class RegionData

The RegionData type exposes the following members.

Public propertyDataGets or sets an array of bytes that specify the Region object.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

The following example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a rectangle and draw its to the screen in black.

  • Creates a region using the rectangle.

  • Gets the RegionData.

  • Draws the region data (an array of bytes) to the screen, by using the DisplayRegionData helper function.

public void GetRegionDataExample(PaintEventArgs e)

    // Create a rectangle and draw it to the screen in black.
    Rectangle regionRect = new Rectangle(20, 20, 100, 100);
    e.Graphics.DrawRectangle(Pens.Black, regionRect);

    // Create a region using the first rectangle.
    Region myRegion = new Region(regionRect);

    // Get the RegionData for this region.
    RegionData myRegionData = myRegion.GetRegionData();
    int myRegionDataLength = myRegionData.Data.Length;
    DisplayRegionData(e, myRegionDataLength, myRegionData);

public void DisplayRegionData(PaintEventArgs e,
    int len,
    RegionData dat)

    // Display the result.
    int i;
    float x = 20, y = 140;
    Font myFont = new Font("Arial", 8);
    SolidBrush myBrush = new SolidBrush(Color.Black);
    e.Graphics.DrawString("myRegionData = ",
        new PointF(x, y));
    y = 160;
    for(i = 0; i < len; i++)
        if(x > 300)
            y += 20;
            x = 20;
            new PointF(x, y));
        x += 30;

.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.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.