网站开发侵权,网页微信文件夹储存在什么位置,做网站要注意些什么要求,淮滨网站建设公司目录
一、柱形图
1.示例源码
2.生成效果
二、折线图
1.示例源码
2.生成效果
三、饼形图
1.示例源码
2.生成效果 GDI绘制的一些常用的图形#xff0c;其中包括柱形图、折线图和饼形图。 一、柱形图 柱形图也称为条形图#xff0c;是程序开发中比较常用的一种图表技术…目录
一、柱形图
1.示例源码
2.生成效果
二、折线图
1.示例源码
2.生成效果
三、饼形图
1.示例源码
2.生成效果 GDI绘制的一些常用的图形其中包括柱形图、折线图和饼形图。 一、柱形图 柱形图也称为条形图是程序开发中比较常用的一种图表技术。柱形图是通过Graphics 类中的FillRectangle()方法实现的。 public void FillRectangle (Brush brush,int x,int y,int width,int height) 参 数说 明brush确定填充特性的BrushX要填充矩形左上角的x坐标y要填充矩形左上角的y坐标width要填充矩形的宽度height要填充矩形的高度 1.示例源码 ,NET 8.0的项目中需要使用NuGet程序包system.data.sqlclient.4.8.5.nupkg或更高级版本。否则不能使用SqlClient的方法。
//Form1.cs
//投票窗口
using System.Data.SqlClient;namespace _12
{public partial class Form1 : Form{SqlConnection? conn;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){ClientSize new Size(292, 192); //设置Form1工作区域StartPosition FormStartPosition.CenterScreen;radioButton1.Checked false;radioButton1.Text 支付宝;radioButton2.Text 微信支付;radioButton3.Text 京东白条;radioButton4.Text 小度钱包;button1.Text 投一票吧;button2.Text 投票结果;groupBox1.Text 投票窗口;radioButton1.Location new Point(26, 37);radioButton2.Location new Point(26, 68);radioButton3.Location new Point(26, 101);radioButton4.Location new Point(26, 132);radioButton1.Size new Size(60, 16);radioButton2.Size new Size(60, 16);radioButton3.Size new Size(60, 16);radioButton4.Size new Size(60, 16);button1.Location new Point(195, 94);button2.Location new Point(195, 132);button1.Size new Size(75, 23);button2.Size new Size(75, 23);}private void Button1_Click(object sender, EventArgs e){try{conn new SqlConnection(serverDESKTOP-S11C97H\SQLEXPRESS;databasedb_CSharp;integrated security True);string sqlstr ;if (radioButton1.Checked){sqlstr update tb_vote set 票数票数1 where 选项 radioButton1.Text ;}if (radioButton2.Checked){sqlstr update tb_vote set 票数票数1 where 选项 radioButton2.Text ;}if (radioButton3.Checked){sqlstr update tb_vote set 票数票数1 where 选项 radioButton3.Text ;}if (radioButton4.Checked){sqlstr update tb_vote set 票数票数1 where 选项 radioButton4.Text ;}conn.Open();SqlCommand cmd new(sqlstr, conn);int i cmd.ExecuteNonQuery();conn.Close();if (i 0){MessageBox.Show(投票成功);}}catch (Exception ex){MessageBox.Show(ex.Message);}}private void Button2_Click(object sender, EventArgs e){Form2 frm2 new();frm2.Show();}}
}//Form2.cs
//根据选票数据库绘制直方图
using System.Data;
using System.Data.SqlClient;namespace _12
{public partial class Form2 : Form{public Form2(){InitializeComponent();}private int Sum;SqlConnection? conn;private void CreateImage(){conn new SqlConnection(serverDESKTOP-S11C97H\SQLEXPRESS;databasedb_CSharp;integrated security True);conn.Open();SqlCommand cmd new(select sum(票数) from tb_vote, conn);Sum (int)cmd.ExecuteScalar();SqlDataAdapter sda new(select * from tb_vote, conn);DataSet ds new();sda.Fill(ds);int TP1 Convert.ToInt32(ds.Tables[0].Rows[0][2].ToString());//第一个选项的票数int TP2 Convert.ToInt32(ds.Tables[0].Rows[1][2].ToString());//第二个选项的票数int TP3 Convert.ToInt32(ds.Tables[0].Rows[2][2].ToString());//第三个选项的票数int TP4 Convert.ToInt32(ds.Tables[0].Rows[3][2].ToString());//第四个选项的票数float tp1 Convert.ToSingle(Convert.ToSingle(TP1) * 100 / Convert.ToSingle(Sum));float tp2 Convert.ToSingle(Convert.ToSingle(TP2) * 100 / Convert.ToSingle(Sum));float tp3 Convert.ToSingle(Convert.ToSingle(TP3) * 100 / Convert.ToSingle(Sum));float tp4 Convert.ToSingle(Convert.ToSingle(TP4) * 100 / Convert.ToSingle(Sum));int width 300, height 300;Bitmap bitmap new(width, height);Graphics g Graphics.FromImage(bitmap);try{g.Clear(Color.White);Brush brush1 new SolidBrush(Color.LightGray);Brush brush2 new SolidBrush(Color.Black);Brush brush3 new SolidBrush(Color.Red);Brush brush4 new SolidBrush(Color.Green);Brush brush5 new SolidBrush(Color.Orange);Brush brush6 new SolidBrush(Color.DarkBlue);Font font1 new(Courier New, 16, FontStyle.Bold);Font font2 new(Courier New, 8);g.FillRectangle(brush1, 0, 0, width, height); //绘制背景浅灰色g.DrawString(投票结果, font1, brush2, new Point(90, 20));Point p1 new(70, 50);Point p2 new(230, 50);g.DrawLine(new Pen(Color.Black), p1, p2);//绘制文字g.DrawString(支付宝, font2, brush2, new Point(45, 80));g.DrawString(微信支付, font2, brush2, new Point(32, 110));g.DrawString(京东白条, font2, brush2, new Point(32, 140));g.DrawString(小度钱包, font2, brush2, new Point(32, 170));//绘制柱形图g.FillRectangle(brush3, 95, 80, tp1, 17);g.FillRectangle(brush4, 95, 110, tp2, 17);g.FillRectangle(brush5, 95, 140, tp3, 17);g.FillRectangle(brush6, 95, 170, tp4, 17);//绘制所有选项的票数显示g.DrawRectangle(new Pen(Color.Green), 10, 210, 280, 80); //绘制范围框g.DrawString(支付宝 TP1.ToString() 票, font2, brush2, new Point(15, 220));g.DrawString(微信支付 TP2.ToString() 票, font2, brush2, new Point(150, 220));g.DrawString(京东白条 TP3.ToString() 票, font2, brush2, new Point(15, 260));g.DrawString(小度钱包 TP4.ToString() 票, font2, brush2, new Point(150, 260));pictureBox1.Image bitmap;}catch (Exception ex){MessageBox.Show(ex.Message);}}private void Form2_Paint(object sender, PaintEventArgs e){CreateImage();}/// summary/// 设置窗体工作区大小设置绘图板工作区默认边距8mm/// /summaryprivate void Form2_Load(object sender, EventArgs e){ClientSize new Size(324, 324); //Form2工作区域大小StartPosition FormStartPosition.CenterScreen;pictureBox1.Size new Size(300, 300); //pictureBox1尺寸边距8mm}}
}2.生成效果 二、折线图 折线图可以很直观地反映出相关数据的变化趋势折线图主要是通过绘制点和折线实现的。绘制点是通过Graphics类中的FillEllipse()方法实现的。绘制折线是通过Graphics类中的DrawLine()方法实现的。 用DrawString()方法绘制文本时文本的长度必须在所绘制的矩形区域内如果超出区域必须用format参数指定截断方式否则将在最近的单词处截断。
1.示例源码
//折线图、趋势图
namespace _11
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Paint(object sender, PaintEventArgs e){string[] month [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];float[] d [20.5F, 60, 10.8F, 15.6F, 30, 70.9F, 50.3F, 30.7F, 70, 50.4F, 30.8F, 20];//画图初始化Bitmap bMap new(500, 500);Graphics gph Graphics.FromImage(bMap);gph.Clear(Color.White);PointF cPt new(40, 420); //坐标原点PointF[] xPt [new PointF(cPt.Y 15, cPt.Y), new PointF(cPt.Y, cPt.Y - 4), new PointF(cPt.Y, cPt.Y 4)]; //X轴箭头点PointF[] yPt [new PointF(cPt.X, cPt.X - 15), new PointF(cPt.X - 4, cPt.X), new PointF(cPt.X 4, cPt.X)]; //Y轴箭头点gph.DrawString(产品月产量趋势图, new Font(宋体, 14), Brushes.Blue, new PointF(cPt.X 60, cPt.X)); //图标题//画X轴gph.DrawLine(Pens.Green, cPt.X, cPt.Y, cPt.Y, cPt.Y); //X轴的长度420 cPt.Ygph.DrawPolygon(Pens.Black, xPt); //X轴箭头gph.FillPolygon(new SolidBrush(Color.Pink), xPt);gph.DrawString(月份, new Font(宋体, 12), Brushes.Black, new PointF(cPt.Y 10, cPt.Y 10));//画Y轴gph.DrawLine(Pens.Black, cPt.X, cPt.Y, cPt.X, cPt.X); //Y轴的长度420-40380gph.DrawPolygon(Pens.Black, yPt); //Y轴箭头gph.FillPolygon(new SolidBrush(Color.Black), yPt);gph.DrawString(单位(万), new Font(宋体, 12), Brushes.Black, new PointF(0, 7));for (int i 1; i 12; i){//画Y轴刻度if (i 11){gph.DrawString((i * 10).ToString(), new Font(宋体, 11), Brushes.Black, new PointF(cPt.X - 30, cPt.Y - i * 30 - 6)); //间隔30单位打一个标记工程值和坐标值间有个3倍的关系gph.DrawLine(Pens.Black, cPt.X - 3, cPt.Y - i * 30, cPt.X, cPt.Y - i * 30); //间隔30单位刻一条标尺}//画X轴项目gph.DrawString(month[i - 1].AsSpan(0, 1), new Font(宋体, 11), Brushes.Black, new PointF(cPt.X i * 30 - 5, cPt.Y 5)); //间隔30单位打第一个字gph.DrawString(month[i - 1].AsSpan(1, 1), new Font(宋体, 11), Brushes.Black, new PointF(cPt.X i * 30 - 5, cPt.Y 20)); //间隔30单位打第二个字if (month[i - 1].Length 2) gph.DrawString(month[i - 1].AsSpan(2, 1), new Font(宋体, 11), Brushes.Black, new PointF(cPt.X i * 30 - 5, cPt.Y 35)); //间隔30单位打第三个字//画数据点gph.DrawEllipse(Pens.Black, cPt.X i * 30 - 1.5F, cPt.Y - d[i - 1] * 3 - 1.5F, 3, 3); //以下Y坐标都要乘以3倍gph.FillEllipse(new SolidBrush(Color.Black), cPt.X i * 30 - 1.5F, cPt.Y - d[i - 1] * 3 - 1.5F, 3, 3);//画数据值gph.DrawString(d[i - 1].ToString(), new Font(宋体, 11), Brushes.Black, new PointF(cPt.X i * 30, cPt.Y - d[i - 1] * 3));//画折线if (i 1) gph.DrawLine(Pens.Red, cPt.X (i - 1) * 30, cPt.Y - d[i - 2] * 3, cPt.X i * 30, cPt.Y - d[i - 1] * 3);}pictureBox1.Image bMap;} }
}2.生成效果 三、饼形图 饼形图可以很直观地查看不同数据所占的比例情况通过Graphics类中的FillPie()方法可以方便地绘制出饼形图。
public void FillPie (Brush brush,int x,int y,int width,int height,int startAngle,int sweepAngle) 参 数 说 明 brush 确定填充特性的Brush X 边框左上角的x坐标该边框定义扇形区所属的椭圆 y 边框左上角的y坐标该边框定义扇形区所属的椭圆 width 边框的宽度该边框定义扇形区所属的椭圆 heigh 边框的高度该边框定义扇形区所属的椭圆 startAngle 从x轴沿顺时针方向旋转到扇形区第一个边所测得的角度(以度为单位) sweepAngle 从startAngle参数沿顺时针方向旋转到扇形区第二个边所测得的角度(以度为单位)
1.示例源码 ,NET 8.0的项目中需要使用NuGet程序包system.data.sqlclient.4.8.5.nupkg或更高级版本。否则不能使用SqlClient的方法。
//绘制饼图
using System.Data.SqlClient;
using System.Data;namespace _10
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){ClientSize new Size(420, 470); StartPosition FormStartPosition.CenterScreen;Text 绘制饼图;pictureBox1.Dock DockStyle.Fill;}private void CreateImage(){//连数据库SqlConnection conn new(serverDESKTOP-S11C97H\SQLEXPRESS;databasedb_CSharp;integrated security True);conn.Open();//计算公司员工总和string str2 SELECT SUM(人数) AS Number FROM tb_age;SqlCommand cmd new(str2, conn);int Sum Convert.ToInt32(cmd.ExecuteScalar());SqlDataAdapter sda new(select * from tb_age, conn);DataSet ds new();sda.Fill(ds);//获取20-25岁员工人数int man20to25 Convert.ToInt32(ds.Tables[0].Rows[0][2].ToString());//获取26-30岁员工人数int man26to30 Convert.ToInt32(ds.Tables[0].Rows[1][2].ToString());//获取31-40岁员工人数int man31to40 Convert.ToInt32(ds.Tables[0].Rows[2][2].ToString());//创建画图对象int width 400, height 450;Bitmap bitmap new(width, height);Graphics g Graphics.FromImage(bitmap);try{//清空背景色g.Clear(Color.White);Pen pen1 new(Color.Red);Brush brush1 new SolidBrush(Color.PowderBlue);Brush brush2 new SolidBrush(Color.Blue);Brush brush3 new SolidBrush(Color.Wheat);Brush brush4 new SolidBrush(Color.Orange);Font font1 new(Courier New, 16, FontStyle.Bold);Font font2 new(Courier New, 8);g.FillRectangle(brush1, 0, 0, width, height); //绘制背景图g.DrawString(公司员工年龄比例饼形图, font1, brush2, new Point(80, 20)); //书写标题int piex 100, piey 60, piew 200, pieh 200;//20-25岁员工在圆中分配的角度float angle1 Convert.ToSingle((360 / Convert.ToSingle(Sum)) * Convert.ToSingle(man20to25));//26-30岁员工在圆中分配的角度float angle2 Convert.ToSingle((360 / Convert.ToSingle(Sum)) * Convert.ToSingle(man26to30));//31-40岁员工在圆中分配的角度float angle3 Convert.ToSingle((360 / Convert.ToSingle(Sum)) * Convert.ToSingle(man31to40));g.FillPie(brush2, piex, piey, piew, pieh, 0, angle1); //绘制20-25岁员工所占比例g.FillPie(brush3, piex, piey, piew, pieh, angle1, angle2); //绘制26-30岁员工所占比例g.FillPie(brush4, piex, piey, piew, pieh, angle1 angle2, angle3); //绘制31-40岁员工所占比例//绘制标识g.DrawRectangle(pen1, 50, 300, 310, 130); //绘制范围框g.FillRectangle(brush2, 90, 320, 20, 10); //绘制小矩形g.DrawString(20-25岁员工占公司总人数比例: Convert.ToSingle(man20to25) * 100 / Convert.ToSingle(Sum) %, font2, brush2, 120, 320);g.FillRectangle(brush3, 90, 360, 20, 10);g.DrawString(26-30岁员工占公司总人数比例: Convert.ToSingle(man26to30) * 100 / Convert.ToSingle(Sum) %, font2, brush2, 120, 360);g.FillRectangle(brush4, 90, 400, 20, 10);g.DrawString(31-40岁员工占公司总人数比例: Convert.ToSingle(man31to40) * 100 / Convert.ToSingle(Sum) %, font2, brush2, 120, 400);}catch (Exception ex){MessageBox.Show(ex.Message);}pictureBox1.Image bitmap;}private void Form1_Paint(object sender, PaintEventArgs e){CreateImage();}}
}2.生成效果
