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Posted 10 May 2003

Gradient Label Control For WinForms

, 10 May 2003
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Create background gradient color bar

Sample Image - GradientLabel.jpg


As all of us know GDI+ which is supported by .NET has many new features for graphics. One of them is the gradient brush. Gradient brushes can also be used to draw lines, curves, and paths. You can use a linear gradient brush to fill a shape with color that changes gradually as you move across the shape. For example, suppose you create a horizontal gradient brush by specifying blue at the left edge of a shape and green at the right edge. When you fill that shape with the horizontal gradient brush, the color changes gradually from blue to green as you move from the shape's left edge to its right edge.

I think it is very useful and so I have written a control called GLabel that inherits from Label control of System.Windows.Forms. This GLabel has backgound with gradient color. Because it is a linear gradient it needs two colors; Left color and Right color for linear gradient. When you use it on a WinForm, you should set two colors via properties BeginColor and EndColor of GLabel class.

Code listing

Following is this GLabel class:

public class GLabel : System.Windows.Forms.Label
 // declare two color for linear gradient
  private Color cLeft;
  private Color cRight;

   // property of begin color in linear gradient
  public Color BeginColor
      return cLeft;
      cLeft = value;
   // property of end color in linear gradient
  public Color EndColor
      return cRight;
      cRight = value;
  public GLabel()
     // Default get system color 
    cLeft = SystemColors.ActiveCaption;
    cRight = SystemColors.Control;
  protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
     // declare linear gradient brush for fill background of label
    LinearGradientBrush GBrush = new LinearGradientBrush(
        new Point(0, 0),
        new Point(this.Width, 0), cLeft, cRight);
    Rectangle rect = new Rectangle(0,0,this.Width,this.Height);
     // Fill with gradient 
    e.Graphics.FillRectangle(GBrush, rect);

     // draw text on label
    SolidBrush drawBrush = new SolidBrush(this.ForeColor);
    StringFormat sf = new StringFormat();
     // align with center
    sf.Alignment = StringAlignment.Center;
     // set rectangle bound text
    RectangleF rectF = new 
     // output string
    e.Graphics.DrawString(this.Text, this.Font, drawBrush, rectF, sf);

This class above is simple. You can develop it to serve your ideas. You can rewrite OnPaint as well, such as write more alignment styles for text. This code is written fixed for the top-center in rectangle (this rectangle contains rectangle of GLabel at center). When you put GLabel control in a WinForm you can write code as shown below:

public class Form1 : System.Windows.Forms.Form
  private GLabel gLabel1;
  private System.ComponentModel.Container components = null;  
  public Form1()
    //Required for Windows Form Designer support
    this.gLabel1 = new GLabel();
    this.gLabel1.BeginColor = System.Drawing.SystemColors.ActiveCaption;
    this.gLabel1.EndColor = System.Drawing.SystemColors.Control;
    this.gLabel1.Name = "gLabel1";
    this.gLabel1.Font = new Font("Verdana", 12F, FontStyle.Bold );
    this.gLabel1.Size = new System.Drawing.Size(350, 50);
    this.gLabel1.TabIndex = 0;
    this.gLabel1.Text = "Nguyen Ha Giang - Vietnam - HCMC";


That's all, thanks a lot for reading from Nguyen Ha Giang, Vietnam, HCM City.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Web Developer
Vietnam Vietnam
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Comments and Discussions

GeneralMy vote of 5 Pin
al6k2-Jun-11 3:54
memberal6k2-Jun-11 3:54 
GeneralHello from HCMC Pin
Sean J Conway15-Oct-06 21:55
memberSean J Conway15-Oct-06 21:55 
GeneralDon't repeat Pin
Meysam Mahfouzi11-May-03 18:08
memberMeysam Mahfouzi11-May-03 18:08 
General[Message Deleted] Pin
nhg2k11-May-03 23:09
membernhg2k11-May-03 23:09 
GeneralRe: Don't repeat Pin
Meysam Mahfouzi12-May-03 18:53
memberMeysam Mahfouzi12-May-03 18:53 
GeneralRe: Don't repeat Pin
Anonymous5-Nov-03 11:13
memberAnonymous5-Nov-03 11:13 
GeneralProblems Pin
Steve McLenithan11-May-03 14:01
memberSteve McLenithan11-May-03 14:01 
GeneralRe: Problems Pin
Carlos H. Perez11-May-03 14:11
memberCarlos H. Perez11-May-03 14:11 
GeneralRe: Problems Pin
Marc Clifton11-May-03 14:22
protectorMarc Clifton11-May-03 14:22 
GeneralRe: Problems Pin
WREY12-May-03 7:55
memberWREY12-May-03 7:55 

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