foreach(DataRow dr in dt.Rows)
{
if(highPoint {
highPoint = Convert.ToSingle(dr[0]);
}
}
//建立一个Graphics对象实例
Bitmap bm = new Bitmap(width,height);
try
{
Graphics g = Graphics.FromImage(bm);
//设置条图图形和文字属性
g.ScaleTransform((Convert.ToSingle(width))/SIDE_LENGTH,(Convert.ToSingle(height))/SIDE_LENGTH);
g.SmoothingMode = SmoothingMode.Default;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
//设定画布和边
g.Clear(Color.White);
g.DrawRectangle(Pens.Black,0,0,SIDE_LENGTH-1,SIDE_LENGTH-1);
//画大标题
g.DrawString(title,new Font("Tahoma",14),Brushes.Black,new PointF(5,5));
//画小标题
g.DrawString(subTitle,new Font("Tahoma",12),Brushes.Black,new PointF(7,35));
//画条形图
float barWidth = CHART_WIDTH / (dt.Rows.Count * 2);
PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2),0);
float barHeight = dt.Rows.Count;
for(int i=0;i {
barHeight = Convert.ToSingle(dt.Rows[i][0]) * 200 / highPoint * 1;
barOrigin.Y = CHART_TOP + CHART_HEIGHT - barHeight;
g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),barOrigin.X,barOrigin.Y,barWidth,barHeight);
barOrigin.X = barOrigin.X + (barWidth * 2);
}
//设置边
g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT));
g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT),new Point(CHART_LEFT + CHART_WIDTH,CHART_TOP + CHART_HEIGHT)); |
