LinearGradientBrush使用

LinearGradientBrush：在一个区域内进行渐变填充。

属性StartPoint定义了启示位置,一般是(0,0) 属性EndPoint定义了结束为宗旨,一般是(1,1).类型为point。所得渐变的颜色是沿着对角方向路径插入的。

GradientStop指各渐变颜色的结束位置。

样例(应用MSDN):

代码

< Rectangle Width = " 200 "  Height = " 100 " >
   < Rectangle.Fill >
     < LinearGradientBrush StartPoint = " 0,0 "  EndPoint = " 1,1 " >
       < GradientStop Color = " Yellow "  Offset = " 0.0 "   />
       < GradientStop Color = " Red "  Offset = " 0.25 "   />
       < GradientStop Color = " Blue "  Offset = " 0.75 "   />
       < GradientStop Color = " LimeGreen "  Offset = " 1.0 "   />
     </ LinearGradientBrush >
   </ Rectangle.Fill >
</ Rectangle >

 

 

代码

Rectangle diagonalFillRectangle  =   new  Rectangle();
diagonalFillRectangle.Width  =   200 ;
diagonalFillRectangle.Height  =   100 ;

//  Create a diagonal linear gradient with four stops.   
LinearGradientBrush myLinearGradientBrush  =
     new  LinearGradientBrush();
myLinearGradientBrush.StartPoint  =   new  Point( 0 , 0 );
myLinearGradientBrush.EndPoint  =   new  Point( 1 , 1 );
myLinearGradientBrush.GradientStops.Add(
     new  GradientStop(Colors.Yellow,  0.0 ));
myLinearGradientBrush.GradientStops.Add(
     new  GradientStop(Colors.Red,  0.25 ));                
myLinearGradientBrush.GradientStops.Add(
     new  GradientStop(Colors.Blue,  0.75 ));        
myLinearGradientBrush.GradientStops.Add(
     new  GradientStop(Colors.LimeGreen,  1.0 ));

//  Use the brush to paint the rectangle.
diagonalFillRectangle.Fill  =  myLinearGradientBrush;