using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.IO;
namespace CollectionEnginery
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    public static SqlConnection My_con; //定義一個(gè)SqlConnection類型的公共變量My_con，用于判斷數(shù)據(jù)庫是否連接成功
    public static string M_str_sqlcon = "Data Source=.;Database=CollectionEnginery;User id=sa;PWD=";
    StreamReader SReader;
    #region 建立數(shù)據(jù)庫連接
    /// <summary>
    /// 建立數(shù)據(jù)庫連接.
    /// </summary>
    /// <returns>返回SqlConnection對(duì)象</returns>
    public static SqlConnection getcon()
    {
      My_con = new SqlConnection(M_str_sqlcon);  //用SqlConnection對(duì)象與指定的數(shù)據(jù)庫相連接
      My_con.Open(); //打開數(shù)據(jù)庫連接
      return My_con; //返回SqlConnection對(duì)象的信息
    }
    #endregion
    #region 創(chuàng)建DataSet對(duì)象
    /// <summary>
    /// 創(chuàng)建一個(gè)DataSet對(duì)象
    /// </summary>
    /// <param name="M_str_sqlstr">SQL語句</param>
    /// <param name="M_str_table">表名</param>
    /// <returns>返回DataSet對(duì)象</returns>
    public DataSet getDataSet(string SQLstr, string tableName)
    {
      getcon();  //打開與數(shù)據(jù)庫的連接
      SqlDataAdapter SQLda = new SqlDataAdapter(SQLstr, My_con); //創(chuàng)建一個(gè)SqlDataAdapter對(duì)象，并獲取指定數(shù)據(jù)表的信息
      DataSet My_DataSet = new DataSet(); //創(chuàng)建DataSet對(duì)象
      SQLda.Fill(My_DataSet, tableName); //通過SqlDataAdapter對(duì)象的Fill()方法，將數(shù)據(jù)表信息添加到DataSet對(duì)象中
      con_close();  //關(guān)閉數(shù)據(jù)庫的連接
      return My_DataSet; //返回DataSet對(duì)象的信息
    }
    #endregion

    #region 關(guān)閉數(shù)據(jù)庫連接
    /// <summary>
    /// 關(guān)閉于數(shù)據(jù)庫的連接.
    /// </summary>
    public void con_close()
    {
      if (My_con.State == ConnectionState.Open)  //判斷是否打開與數(shù)據(jù)庫的連接
      {
        My_con.Close();  //關(guān)閉數(shù)據(jù)庫的連接
        My_con.Dispose();  //釋放My_con變量的所有空間
      }
    }
    #endregion

    private void Form1_Load(object sender, EventArgs e)
    {
      DataSet dataSet = new DataSet();
      dataSet = getDataSet("select * from tb_Collection", "tb_Collection");
      dataGridView1.DataSource = dataSet.Tables[0];
      dataGridView1.Columns[0].HeaderText = "編號(hào)";
      dataGridView1.Columns[0].Width = 40;
      dataGridView1.Columns[1].HeaderText = "書名";
      dataGridView1.Columns[1].Width = 140;
      dataGridView1.Columns[2].HeaderText = "條形碼";
      dataGridView1.Columns[2].Width = 80;
      dataGridView1.Columns[3].HeaderText = "累加值";
      dataGridView1.Columns[3].Width = 80;
      dataGridView1.Columns[4].HeaderText = "總計(jì)";
      dataGridView1.Columns[4].Width = 40;
    }
    private void button1_Click(object sender, EventArgs e)
    {
      string tem_str = "";//記錄當(dāng)前行
      string tem_code = "";//條形碼號(hào)
      string tem_mark = "";//個(gè)數(shù)
      string tem_s=" ";
      StreamReader var_SRead = new StreamReader(Application.StartupPath + "\\AddData.dat");//實(shí)例化StreamReader，并打開指定的文件
      while (true)//讀取dat文件中的所有行
      {
        tem_str = var_SRead.ReadLine();//記錄dat文件指定行的數(shù)據(jù)
        tem_code = tem_str.Substring(0, tem_str.IndexOf(Convert.ToChar(tem_s))).Trim();//獲取當(dāng)前行的條形碼
        tem_mark = tem_str.Substring(tem_str.IndexOf(Convert.ToChar(tem_s)), tem_str.Length - tem_str.IndexOf(Convert.ToChar(tem_s))-1).Trim();//獲取當(dāng)前條形碼的個(gè)數(shù)
        for (int i = 0; i < dataGridView1.RowCount - 1; i++)//在dataGridView1控件中查找相應(yīng)的條形碼
        {
          if (dataGridView1.Rows[i].Cells[2].Value.ToString().Trim() == tem_code)//如查找到
          {
            dataGridView1.Rows[i].Cells[3].Value = tem_mark.ToString();//顯示當(dāng)前要添加的個(gè)數(shù)
            dataGridView1.Rows[i].Cells[4].Value = Convert.ToInt32(dataGridView1.Rows[i].Cells[4].Value) + Convert.ToInt32(tem_mark);//計(jì)算當(dāng)前條形碼的總數(shù)
          }
        }
        if (var_SRead.EndOfStream)//如果查詢到文件尾
          break;//退出循環(huán)
      }
      var_SRead.Close();//釋放所有資源
    }
  }
}