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FrameStyle Enumeration

Specifies the frame style of the selected control.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public enum FrameStyle
public enum FrameStyle
public enum FrameStyle

 Member nameDescription
DashedA thin, dashed border. 
ThickA thick, solid border. 

This enumeration is used by ControlPaint.DrawReversibleFrame.

DrawReversibleFrame is used when selecting objects or during drag-and-drop operations.

The following code example demonstrates using the FrameStyle enumeration. To run the example, paste the following code in a form called Form1 containing several controls.This example assumes the MouseDown, MouseMove, and MouseUp events are connected to the event-handler methods defined in the example.

// The following three methods will draw a rectangle and allow 
// the user to use the mouse to resize the rectangle.  If the 
// rectangle intersects a control's client rectangle, the 
// control's color will change.

bool isDrag = false;
Rectangle theRectangle = new Rectangle
    (new Point(0, 0), new Size(0, 0));
Point startPoint;

private void Form1_MouseDown(object sender, 
    System.Windows.Forms.MouseEventArgs e)
{

    // Set the isDrag variable to true and get the starting point 
    // by using the PointToScreen method to convert form 
    // coordinates to screen coordinates.
    if (e.Button==MouseButtons.Left)
    {
        isDrag = true;
    }

    Control control = (Control) sender;

    // Calculate the startPoint by using the PointToScreen 
    // method.
    startPoint = control.PointToScreen(new Point(e.X, e.Y));
}

private void Form1_MouseMove(object sender, 
    System.Windows.Forms.MouseEventArgs e)
{

    // If the mouse is being dragged, 
    // undraw and redraw the rectangle as the mouse moves.
    if (isDrag)

        // Hide the previous rectangle by calling the 
        // DrawReversibleFrame method with the same parameters.
    {
        ControlPaint.DrawReversibleFrame(theRectangle, 
            this.BackColor, FrameStyle.Dashed);

        // Calculate the endpoint and dimensions for the new 
        // rectangle, again using the PointToScreen method.
        Point endPoint = ((Control) sender).PointToScreen(new Point(e.X, e.Y));

        int width = endPoint.X-startPoint.X;
        int height = endPoint.Y-startPoint.Y;
        theRectangle = new Rectangle(startPoint.X, 
            startPoint.Y, width, height);

        // Draw the new rectangle by calling DrawReversibleFrame
        // again.  
        ControlPaint.DrawReversibleFrame(theRectangle, 
            this.BackColor, FrameStyle.Dashed);
    }
}

private void Form1_MouseUp(object sender, 
    System.Windows.Forms.MouseEventArgs e)
{

    // If the MouseUp event occurs, the user is not dragging.
    isDrag = false;

    // Draw the rectangle to be evaluated. Set a dashed frame style 
    // using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, 
        this.BackColor, FrameStyle.Dashed);

    // Find out which controls intersect the rectangle and 
    // change their color. The method uses the RectangleToScreen  
    // method to convert the Control's client coordinates 
    // to screen coordinates.
    Rectangle controlRectangle;
    for(int i = 0; i < Controls.Count; i++)
    {
        controlRectangle = Controls[i].RectangleToScreen
            (Controls[i].ClientRectangle);
        if (controlRectangle.IntersectsWith(theRectangle))
        {
            Controls[i].BackColor = Color.BurlyWood;
        }
    }

    // Reset the rectangle.
    theRectangle = new Rectangle(0, 0, 0, 0);
}

// The following three methods will draw a rectangle and allow 
// the user to use the mouse to resize the rectangle. If the 
// rectangle intersects a control's client rectangle, the 
// control's color will change.
private boolean isDrag = false;
private Rectangle theRectangle =
    new Rectangle(new Point(0, 0), new Size(0, 0));
private Point startPoint;

private void Form1_MouseDown(Object sender,
    System.Windows.Forms.MouseEventArgs e)
{
    // Set the isDrag variable to true and get the starting point 
    // by using the PointToScreen method to convert form 
    // coordinates to screen coordinates.
    if (e.get_Button().Equals(MouseButtons.Left)) {
        isDrag = true;
    }

    Control control = (Control)sender;
    // Calculate the startPoint by using the PointToScreen 
    // method.
    startPoint = control.PointToScreen(new Point(e.get_X(), e.get_Y()));
} //Form1_MouseDown

private void Form1_MouseMove(Object sender,
    System.Windows.Forms.MouseEventArgs e)
{
    // If the mouse is being dragged, 
    // undraw and redraw the rectangle as the mouse moves.
    if (isDrag) {
        // Hide the previous rectangle by calling the 
        // DrawReversibleFrame method with the same parameters.
        ControlPaint.DrawReversibleFrame(theRectangle, this.get_BackColor(),
            FrameStyle.Dashed);
        // Calculate the endpoint and dimensions for the new 
        // rectangle, again using the PointToScreen method.
        Point endPoint = this.PointToScreen(new Point(e.get_X(), e.get_Y()));
        int width = endPoint.get_X() - startPoint.get_X();
        int height = endPoint.get_Y() - startPoint.get_Y();
        theRectangle = new Rectangle(startPoint.get_X(), startPoint.get_Y(),
            width, height);
        // Draw the new rectangle by calling DrawReversibleFrame
        // again.  
        ControlPaint.DrawReversibleFrame(theRectangle, this.get_BackColor(),
            FrameStyle.Dashed);
    }
} //Form1_MouseMove

private void Form1_MouseUp(Object sender,
    System.Windows.Forms.MouseEventArgs e)
{
    // If the MouseUp event occurs, the user is not dragging.
    isDrag = false;
    // Draw the rectangle to be evaluated. Set a dashed frame style 
    // using the FrameStyle enumeration.
    ControlPaint.DrawReversibleFrame(theRectangle, this.get_BackColor(),
        FrameStyle.Dashed);
    // Find out which controls intersect the rectangle and 
    // change their color. The method uses the RectangleToScreen  
    // method to convert the Control's client coordinates 
    // to screen coordinates.
    Rectangle controlRectangle;
    for (int i = 0; i < get_Controls().get_Count(); i++) {
        controlRectangle =
            get_Controls().get_Item(i).RectangleToScreen(get_Controls().
            get_Item(i).get_ClientRectangle());
        if (controlRectangle.IntersectsWith(theRectangle)) {
            get_Controls().get_Item(i).set_BackColor(Color.get_BurlyWood());
        }
    }
    // Reset the rectangle.
    theRectangle = new Rectangle(0, 0, 0, 0);
} //Form1_MouseUp

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

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