源码推荐：一个使用C#绘制图形引擎的Framework

maxLegendHeight = (maxLegendHeight > currentHeight) ? maxLegendHeight : currentHeight ;

}

legendRect = new RectangleF(r.X+2, r.Y+2, maxLegendWidth + 25 + 5, ((maxLegendHeight+2)*chartData.Lines.Count) + 3) ;

}

private void DrawBackground() {

LinearGradientBrush b = new LinearGradientBrush(r, Color.SteelBlue, backColor,LinearGradientMode.Horizontal);

g.FillRectangle(b, r);

b.Dispose();

}

private void InternalDrawChart() {

DrawGrid() ;

foreach (ChartLine cl in chartData.Lines) {

DrawLine(cl);

}

DrawLegend() ;

//Draw time on chart

string timeString = DateTime.ToString(DateTime.Now) ;

SizeF textsize = g.MeasureString(timeString,baseFont);

g.DrawString(timeString, baseFont, new SolidBrush(foreColor), r.Width - textsize.Width - 5, textsize.Height * 2 / 3) ;

}

private void DrawGrid() {

Pen gridPen = new Pen(chartData.GridColor) ;

//Vertical - include tick desc's

if (chartData.ShowVGridLines) {

for (int i = 0 ; (vspacing * i) < right; i++) {

float x = left + (vspacing *i);

string desc = chartData.XAxisTitles[i];

g.DrawLine(gridPen, x,top,x,bottom +(baseFont.Size*1/3));

SizeF textsize = g.MeasureString(desc,baseFont);

g.DrawString(desc, baseFont, new SolidBrush(chartData.GridColor), x-(textsize.Width/2), bottom + (baseFont.Size*2/3)) ;

}