源码推荐：一个使用C#绘制图形引擎的Framework

}

//Horizontal

if (chartData.ShowHGridLines) {

for (float i = bottom ; i > top; i-=hspacing) {

string desc = tickCount.ToString();

tickCount+=chartData.YTickSize;

g.DrawLine(gridPen, right, i, left-3, i);

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

g.DrawString(desc, baseFont, new SolidBrush(chartData.GridColor), left-textsize.Width - 3, i - (textsize.Height/2)) ;

}

}

}

private void DrawLine(ChartLine chartLine) {

Pen linePen = new Pen(chartLine.Color);

linePen.StartCap = LineCap.Round;

linePen.EndCap = LineCap.Round;

linePen.Width = chartLine.Width ;

linePen.DashStyle = chartLine.LineStyle;

PointF[] Values = new PointF[chartLine.Values.Length];

float scale = hspacing / chartData.YTickSize ;

for (int i = 0 ; i < chartLine.Values.Length; i++) {

float x = left + vspacing * i;

Values[i] = new PointF(x, bottom-chartLine.Values[i]*scale);

}

g.DrawLines(linePen, Values);

}

private void DrawLegend() {

//Draw Legend Box

ControlPaint.DrawBorder(g, (Rectangle)legendRect, SystemColors.WindowFrame, ButtonBorderStyle.Solid);

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

r.Inflate(-1, -1);

g.FillRectangle(b, legendRect);

b.Dispose();

float startY = 5;