C#實現漸變顏色的Windows窗體控件

C#實現漸變顏色的Windows窗體控件!

1,定義一個BaseFormGradient,繼承于System.Windows.Forms.Form
2,定義三個變量:

private?Color?_Color1?=?Color.Gainsboro;
????????private?Color?_Color2?=?Color.White;
????????private?float?_ColorAngle?=?0f;

3,重載OnPaintBackground方法

protected?override?void?OnPaintBackground(PaintEventArgs?pevent)
????????{
????????????//?Getting?the?graphics?object
????????????Graphics?g?=?pevent.Graphics;

????????????//?Creating?the?rectangle?for?the?gradient
????????????Rectangle?rBackground?=?new?Rectangle(0,?0,?this.Width,?this.Height);

????????????//?Creating?the?lineargradient
????????????System.Drawing.Drawing2D.LinearGradientBrush?bBackground?
????????????????=?new?System.Drawing.Drawing2D.LinearGradientBrush(rBackground,?_Color1,?_Color2,?_ColorAngle);

????????????//?Draw?the?gradient?onto?the?form
????????????g.FillRectangle(bBackground,?rBackground);

????????????//?Disposing?of?the?resources?held?by?the?brush
????????????bBackground.Dispose();
????????}

4,定義一個新窗體GradientForm,繼承BaseFormGradient.
public class GradientForm : BaseFormGradient

5,在窗體GradientForm中,設置_Color1,_Color2,_ColorAngle