c# GDI+绘图的应用-统计票数

c# GDI+绘图的应用-统计票数
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Drawing.Drawing2D;
namespace Test10
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private int Sum;
SqlConnection conn;
private void CreateImage()
{
conn = new SqlConnection(“server=MRC-8CF94303A82\MRNET;database=db_22;uid=sa;pwd=111”);
conn.Open();
SqlCommand cmd = new SqlCommand(“select sum(票数) from tb_vote”, conn);
Sum = (int)cmd.ExecuteScalar();
SqlDataAdapter sda = new SqlDataAdapter(“select * from tb_vote”, conn);
DataSet ds = new DataSet();
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 Bitmap(width, height);
Graphics g = Graphics.FromImage(bitmap);
try
{
g.Clear(Color.White);
Brush brush1 = new SolidBrush(Color.White);
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 Font(“Courier New”, 16, FontStyle.Bold);
Font font2 = new Font(“Courier New”, 8);
g.FillRectangle(brush1, 0, 0, width, height); //绘制背景图
g.DrawString(“投票结果”, font1, brush2, new Point(90, 20));
Point p1 = new Point(70, 50);
Point p2 = new Point(230, 50);
g.DrawLine(new Pen(Color.Black), p1, p2);
//绘制文字
g.DrawString(“用一生下载你：”, font2, brush2, new Point(10, 80));
g.DrawString(“一生所爱：”, font2, brush2, new Point(32, 110));
g.DrawString(“芸烨湘枫：”, font2, brush2, new Point(32, 140));
g.DrawString(“情茧：”, font2, brush2, new Point(54, 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(“用一生下载你：” + TP1.ToString() + “票”, font2, brush2, new Point(15, 220));
g.DrawString(“一生所爱：” + TP2.ToString() + “票”, font2, brush2, new Point(150, 220));
g.DrawString(“芸烨湘枫：” + TP3.ToString() + “票”, font2, brush2, new Point(15, 260));
g.DrawString(“情茧：” + 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();
}
}
}