form1.cs

在文本分类中对测试集进行测试后求得分类的准确率。

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.IO;

namespace precision
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// 必需的设计器变量。
		//数据库操作公用变量
		public SqlConnection sqlConnection1=new SqlConnection();
		public SqlCommand myCommand;
		private System.Windows.Forms.Button button2;// = new SqlCommand();
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(192, 56);
			this.button1.Name = "button1";
			this.button1.TabIndex = 0;
			this.button1.Text = "连数据库";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(192, 112);
			this.button2.Name = "button2";
			this.button2.TabIndex = 1;
			this.button2.Text = "precision";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			string strConnection="Persist Security Info=false;";
			strConnection +="user id=sa;password=sa;database=northwind;";
			sqlConnection1.ConnectionString=strConnection;
			sqlConnection1.Open(); 
			myCommand=new SqlCommand();
			myCommand.Connection=sqlConnection1;
			
			MessageBox.Show("连接成功");
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			string[] class1=new string[9100];
			string[] class2=new string[9100];
			string[] testfilename=new string[9100];
			int count=0;
			int i;
			int testnumber=0;

			float precision=0;
			//测试文本个数
			string mySelectQuery ="select count(distinct filename) from test整体";//
			myCommand.CommandText=mySelectQuery;
			SqlDataReader sqlRead=myCommand.ExecuteReader();
			sqlRead.Read();
			testnumber=(int)sqlRead[0];//
			sqlRead.Close();
			mySelectQuery ="select * from class整体";//
			myCommand.CommandText=mySelectQuery;
			sqlRead=myCommand.ExecuteReader();
			i=0;
			while(sqlRead.Read())
			{
				testfilename[i]=sqlRead[0].ToString().Trim();
				class1[i]=sqlRead[2].ToString().Trim();
				i++;
			}
			sqlRead.Close();
         
			for(i=0;i<testnumber;i++)
			{
				mySelectQuery ="select distinct class from test整体 where filename='" + testfilename[i] + "'";//
				myCommand.CommandText=mySelectQuery;
				sqlRead=myCommand.ExecuteReader();
				sqlRead.Read();
				class2[i]=sqlRead[0].ToString().Trim();
				if(class2[i]==class1[i])
					count++;
				sqlRead.Close();
			}

			precision=(float)count/(float)testnumber;
			//
			FileInfo file=new FileInfo(@"C:\Documents and Settings\111\桌面\分类结果\fenleizhengti.txt");
			file.Delete();
			//C:\Documents and Settings\cmc\桌面\分类结果
			StreamWriter writer=new StreamWriter(@"C:\Documents and Settings\111\桌面\分类结果\fenleizhengti.txt",false);
			//writer.WriteLine("分类结果：");
			//for(i=0;i<testnumber;i++)
			//{
			//	writer.WriteLine(i+","+trueclass[i]+","+testclass[i]);
			//Console.WriteLine(testfilename[i]+","+trueclass[i]+","+testclass[i]);
			//}
			writer.WriteLine("准确率:");
			writer.WriteLine(precision.ToString());
			MessageBox.Show("success"+precision.ToString());

			writer.Close();
			sqlConnection1.Close();			
			
		}
	}
}