Asp.Net 使用 GDI 绘制3D饼图入门篇源码

bitmap objbitmap = new bitmap(width, height);
graphics objgraphics = graphics.fromimage(objbitmap);
objgraphics.drawrectangle(new pen(color.black),0,0,width,height);
objgraphics.fillrectangle(new solidbrush(color.white), 1, 1,width - 2, height - 2);
solidbrush objbrush = new solidbrush(color.blue);
objgraphics.smoothingmode = smoothingmode.antialias;

int icurrentpos = 0;

color[] arrcolor = {color.red,color.red,color.red,color.red,color.red,color.red};

for(int i = arrvote.length - 1 ; i >= 0; i--)
{
arrcolor[i] = color.fromargb(oran.next(255), oran.next(255), oran.next(255));
}

for(int i = arrvote.length - 1 ; i >= 0; i--)
{
objbrush.color = arrcolor[i];
for(int iloop2 = 0; iloop2 < pieshadow; iloop2 )
objgraphics.fillpie(new hatchbrush(hatchstyle.percent50,objbrush.color),x, y iloop2, piewidth, pieheight, icurrentpos, arrvote[i]);
icurrentpos = arrvote[i];
}

icurrentpos = 0;
for(int i = arrvote.length - 1 ; i >= 0;i--)
{
objbrush.color = arrcolor[i];
objgraphics.fillpie(objbrush,x, y, piewidth, pieheight, icurrentpos, arrvote[i]);
icurrentpos = arrvote[i];
}

objbitmap.save(response.outputstream, imageformat.jpeg);
// clean up...
objgraphics.dispose();
objbitmap.dispose();
}

#region web 窗体设计器生成的代码
override protected void oninit(eventargs e)
{
//
// codegen: 该调用是 asp.net web 窗体设计器所必需的。
//
initializecomponent();
base.oninit(e);
}

///
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///
private void initializecomponent()
{
this.load = new system.eventhandler(this.page_load);
}
#endregion
}
}