如何将Net绘制的柱形图改写为长尾词？

本文共计659个文字，预计阅读时间需要3分钟。

python// 绘制柱形图Total方法用于计算一年内的总流量，首先忽略具体数据，自行编写代码；int w=600; int h=400; Bitmap b=new Bitmap(w, h); Graphics g=Graphics.FromImage(b); g.Clear(Color.White); LinearGradientBrush brush=new LinearGradientBrush();

//绘制柱形图

Total方法是计算一年内的总流量，先忽略根据自己情况编写；

int w = 600;

int h = 400;

Bitmap b = new Bitmap(w,h);

Graphics g = Graphics.FromImage(b);

g.Clear(Color.White);

LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, b.Width, b.Height), Color.Blue, Color.BlueViolet, 1.2f, true);

Font font = new Font("Arial",7, FontStyle.Regular);

Font font1 = new Font("宋体", 20, FontStyle.Bold);

g.FillRectangle(Brushes.WhiteSmoke, 0, 0, w, h);

g.DrawString("2022年各月份流量统计", font1, brush, new PointF(130, 30));

g.DrawRectangle(new Pen(Color.Blue), 0, 0, w - 1, h - 1);

Pen p = new Pen(brush, 1);

//绘制竖线

int x = 100;

for (int i = 0; i < 11; i++)

{

g.DrawLine(p, x, 80, x, 340);

x = x + 40;

}

g.DrawLine(new Pen(Color.Blue, 2), x - 480, 80, x - 480, 340);

//绘制横线

int y1 = 106;

for (int y = 0; y < 9; y++)

{

g.DrawLine(p, 60, y1, 540, y1);

y1 = y1 + 26;

}

g.DrawLine(new Pen(Color.Blue, 2), 60, y1, 540, y1);

string[] n = { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"};

x = 62;

for (int i = 0; i < 12; i++)

{

g.DrawString(n[i], font, Brushes.Black, x, 350);

x = x + 40;

}

string[] m1 = {"100%", "90%", "80%", "70%", "60%", "50%", "40%", "30%", "20%", "10%","0%" };

y1 = 85;

for (int i = 0; i < 11; i++)

{

g.DrawString(m1[i], font, Brushes.Black, 25, y1);

y1 = y1 + 26;

}

int[] count = new int[12];

SqlConnection c = new SqlConnection(ConfigurationManager.AppSettings["cons"]);

c.Open();

SqlDataAdapter d;

string cmdStr="";

DataSet ds = new DataSet();

for (int i = 0; i < 12; i++)

{

cmdStr = "select count(*) as count,month(logintime) logintime from tb_10 where year(logintime)=2007 and month(logintime)="+i+1+ " group by month(logintime)";

d = new SqlDataAdapter(cmdStr, c);

d.Fill(ds, i.ToString());

if (ds.Tables[i].Rows.Count == 0)

{

count[i] = 0;

}

else

{

count[i] = Convert.ToInt32(ds.Tables[i].Rows[0][0])*100/Total();

}

}

//绘制方形块

x = 70;

for (int i = 0; i < 12; i++)

{

g.FillRectangle(new SolidBrush(Color.Blue), x, 340 - count[i] * 26 / 10, 20, count[i] * 26 / 10);

x = x + 40;

}

System.IO.MemoryStream m = new System.IO.MemoryStream();

b.Save(m, System.Drawing.Imaging.ImageFormat.Jpeg);

Response.ClearContent();

Response.ContentType = "image/Jpeg";

Response.BinaryWrite(m.ToArray());

图示：