public void Render(string title, string subTitle,
int width, int height, DataSet chartData, Stream target, string[] question)
{
const int SIDE_LENGTH = 820;
const int CHART_TOP = 75;
const int CHART_HEIGHT = 420;
const int CHART_LEFT = 50;
const int CHART_WIDTH = 620;
DataTable dt = chartData.Tables[0];
//计算最高的点
float highPoint = dt.Rows.Count;
//建立一个Graphics对象实例
Bitmap bm = new Bitmap(width, height);
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.SkyBlue);
g.DrawRectangle(Pens.Black, 0, 0, SIDE_LENGTH - 1, SIDE_LENGTH - 1);
//画大标题
g.DrawString(title, new Font("Tahoma", 15), Brushes.Black, new PointF(5, 5));
//画小标题
g.DrawString(subTitle, new Font("Tahoma", 10),
Brushes.Black, new PointF(7, 35));
//画条形图
float barWidth = CHART_WIDTH / (30);
PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2), 0);
float barHeight = highPoint;
for (int i = 0; i < dt.Columns.Count; i++)
{
int Count_A = 0;
int Count_B = 0;
int Count_C = 0;
g.DrawRectangle(Pens.Black, (i) * 50 + 60, 145, 40, 350);
for (int j = 0; j < dt.Rows.Count; j++)
{
switch (dt.Rows[j][i].ToString().Trim())
{
case "A": Count_A++; break;
case "B": Count_B++; break;
case "C": Count_C++; break;
}
}
StringBuilder s = new StringBuilder();
foreach (char c in question[i].ToCharArray())
{
s.AppendLine(c.ToString());
}
// s.AppendLine("问").AppendLine("题").AppendLine(Convert.ToInt32(i + 1).ToString());
g.DrawString(s.ToString(), new Font("Tahoma", 12), Brushes.Black, new PointF((i) * 50 + 65, 500));
int hei2 = 0;
int hei = 0;
Double precent = 0.00;
for (int x = 0; x < 3; x++)
{
switch (x)
{
case 0: hei = Count_A; precent = (Convert.ToDouble(Count_A / highPoint) * 100 / 100); break;
case 1: hei = Count_B; precent = Convert.ToDouble(Count_B / highPoint) * 100 / 100; break;
case 2: hei = Count_C; precent = Convert.ToDouble(Count_C / highPoint) * 100 / 100; break;
}
if (hei == 0)
{
continue;
}
else
{
g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(x)),
(i) * 50 + 60, x == 0 ? 145 : 145 + hei2, 40, Convert.ToInt32(((hei * 350) / highPoint)));
// g.DrawString((precent ).ToString() , new Font("Tahoma", 10), Brushes.Black, new PointF((i) * 50 + 60, x == 0 ? 155 : 155 + hei2));
int fontSize = 12;
// hei = 200;
if (Convert.ToInt32(hei) > 100)
{
fontSize = 9;
}
if (hei.ToString().Length - highPoint.ToString().Length <= -2)
{
}
else
{
g.DrawString((hei).ToString() + " 票", new Font("Tahoma", fontSize), Brushes.Black, new PointF((i) * 50 + 60, x == 0 ? 145 : 145 + hei2));
}
//g.DrawString((precent*100).ToString("F2")+"%", new Font("Tahoma", 10), Brushes.Black, new PointF((i) * 50 + 60, x == 0 ? 155 : 155 + hei2));
hei2 += Convert.ToInt32(((hei * 350) / highPoint));
}
}
}
//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 + 200, CHART_TOP + CHART_HEIGHT));
//画图例框和文字
g.DrawRectangle(new Pen(Color.Black, 1), 550, 650, 300, 230);
g.DrawString("图例说明", new Font("Tahoma", 12, FontStyle.Bold),
Brushes.Black, new PointF(550, 650));
////画图例
PointF boxOrigin = new PointF(560, 750);
PointF textOrigin = new PointF(600, 750);
string txt = string.Empty;
g.DrawString("共有投票: " + highPoint + " 次", new Font("Tahoma", 13), Brushes.Black, new PointF(560, 680));
g.DrawString("↑ 票数", new Font("Tahoma", 10), Brushes.Black, new PointF(686, 750));
g.DrawString("→ 问题项", new Font("Tahoma", 10), Brushes.Black, new PointF(686, 775));
for (int i = 0; i < 3; i++)
{
switch (i)
{
case 0: txt = "满意"; break;
case 1: txt = "基本满意"; break;
case 2: txt = "不满意"; break;
}
g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),
boxOrigin.X, boxOrigin.Y, 20, 15);
g.DrawRectangle(Pens.Black, boxOrigin.X, boxOrigin.Y, 20, 15);
g.DrawString(txt, new Font("Tahoma", 10), Brushes.Black, textOrigin);
boxOrigin.Y += 25;
textOrigin.Y += 25;
}
//输出图形
bm.Save(target, ImageFormat.Gif);
//资源回收
bm.Dispose();
g.Dispose();
}
public void Render(string title, string subTitle, int width, int height, DataSet chartData, Stream target)
{
const int SIDE_LENGTH = 400;
const int PIE_DIAMETER = 200;
DataTable dt = chartData.Tables[0];
//通过输入参数，取得饼图中的总基数
float sumData = 0;
foreach (DataRow dr in dt.Rows)
{
sumData += Convert.ToSingle(dr[1]);
}
//产生一个image对象，并由此产生一个Graphics对象
Bitmap bm = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bm);
//设置对象g的属性
g.ScaleTransform((Convert.ToSingle(width)) / SIDE_LENGTH,
(Convert.ToSingle(height)) / SIDE_LENGTH);
g.SmoothingMode = SmoothingMode.Default;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
//画布和边的设定
g.Clear(Color.White);
g.DrawRectangle(Pens.Black, 0, 0, SIDE_LENGTH - 1, SIDE_LENGTH - 1);
//画饼图标题
g.DrawString(title, new Font("Tahoma", 24),
Brushes.Black, new PointF(5, 5));
//画饼图的图例
g.DrawString(subTitle, new Font("Tahoma", 14),
Brushes.Black, new PointF(7, 35));
//画饼图
float curAngle = 0;
float totalAngle = 0;
for (int i = 0; i < dt.Rows.Count; i++)
{
curAngle = Convert.ToSingle(dt.Rows[i][1]) / sumData * 360;
g.FillPie(new SolidBrush(ChartUtil.GetChartItemColor(i)), 100, 65, PIE_DIAMETER,
PIE_DIAMETER, totalAngle, curAngle);
g.DrawPie(Pens.Black, 100, 65, PIE_DIAMETER, PIE_DIAMETER,
totalAngle, curAngle);
totalAngle += curAngle;
}
//画图例框及其文字
g.DrawRectangle(Pens.Black, 200, 300, 199, 99);
g.DrawString("Legend", new Font("Tahoma", 12, FontStyle.Bold),
Brushes.Black, new PointF(200, 300));
//画图例各项
PointF boxOrigin = new PointF(210, 330);
PointF textOrigin = new PointF(235, 326);
float percent = 0;
for (int i = 0; i < dt.Rows.Count; i++)
{
g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),
boxOrigin.X, boxOrigin.Y, 20, 10);
g.DrawRectangle(Pens.Black, boxOrigin.X, boxOrigin.Y, 20, 10);
percent = Convert.ToSingle(dt.Rows[i][1]) / sumData * 100;
g.DrawString(dt.Rows[i][0].ToString() + " - " + dt.Rows
[i][1].ToString() + " (" + percent.ToString("0") + "%)", new Font("Tahoma", 10), Brushes.Black, textOrigin);
boxOrigin.Y += 15;
textOrigin.Y += 15;
}
//通过Response.OutputStream，将图形的内容发送到浏览器
bm.Save(target, ImageFormat.Gif);
//回收资源
bm.Dispose();
g.Dispose();
}