C#导入EXCEL

/*注意：测试过程中将执行时间设为非月末，此类放在实际中需要改成月末。改变方法是把16行的==变为!=*/
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.OleDb ;
using System.Windows.Forms;
using System.Text;
using System.IO;
using System.Reflection;
/*SQL server 2000中的电话记录以及信息发布记录打入数据导入excel文件*/
public class IntroduceExcel:System.Windows.Forms.Form
{
 public IntroduceExcel ( )
 {
  DateTime today = System.DateTime.Today;//获取当前时间
  if (today.Day==DateTime.DaysInMonth(today.Year,today.Month))
  {//如果并非月底，不执行导入
   return;
  }
  else//否则执行导入
   if (MessageBox.Show("点击确定开始导入，点击否可日后手动导入\n ", "月末电话记录，信息发布记录导入Excel程序自动开启", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.No)
  {
   return; }//if
  else
  {
   
   GetConnect ( "CallRecord") ; //打开数据链接，开启导入函数
   GetConnect ( "PubInfRecord") ;
   DeleteRecord("CallRecord");//清空本月的数据
   DeleteRecord("PubInfRecord");
  }//else
 }
 
 /*exel文件导入函数*/
 private void GetConnect (string origin)
 {
  SqlConnection con=creCon();//创建一个SQL 2000数据库链接
  con.Open();
  string sql="select * from "+origin+" order by NetId"; //查询数据库
  SqlDataAdapter sa=new SqlDataAdapter(sql,con);
  DataSet ds=new DataSet();
  sa.Fill(ds,origin); //填充数据
  try
  {
   Excel.Application excel = new Excel.Application ( ) ; //开启excel
   excel.Application.Workbooks.Add ( true );
   Excel.Sheets ExcelSheets = excel.Worksheets; //建立一个新的工作表
   excel.Cells[ 1 , 1 ] ="NetId（网号）";
   excel.Cells[ 1,  2 ] ="MemId(成员号)";
   excel.Cells[ 1 , 3 ] ="CurCallNum(当前打入电话)";
   excel.Cells[ 1 , 4 ] ="CompanyName（公司名）";
   excel.Cells[ 1 , 5 ] ="UpWorker（坐席人员）";
   excel.Cells[ 1 , 6 ] ="SumNumber（本月次数统计）";
   object missing=Missing.Value;
   excel.Visible =true ;     //excel文件可见
   int RoLength=ds.Tables[0].Rows.Count; //行数
   int i;
   for (i=0;i<RoLength;i++)
   {
    /*从数据库中取出电话相关信息*/
    string NetId=ds.Tables[0].Rows[i][0].ToString();
    string MemId=ds.Tables[0].Rows[i][1].ToString();
    string CallNumber=ds.Tables[0].Rows[i][2].ToString();
    string CompanyName=ds.Tables[0].Rows[i][3].ToString();
    string Worker=ds.Tables[0].Rows[i][4].ToString();
    string Number=ds.Tables[0].Rows[i][5].ToString();
    /*填充到excel的工作表中*/
    excel.Cells[ i+1 , 1 ] =NetId;
    excel.Cells[ i+1,  2 ] =MemId;
    excel.Cells[ i+1 , 3 ] =CallNumber;
    excel.Cells[ i+1 , 4 ] =CompanyName;
    excel.Cells[ i+1 , 5 ] =Worker;
    excel.Cells[ i+1 , 6 ] =Number;
   }//for
   con.Close();//关闭此数据链接

   /*文件保存对话框，文件保存采用了一个file自定义类*/
  
   SaveFileDialog saveFileDialog=new SaveFileDialog();
   saveFileDialog.Filter= "Excel files(*.xls)|*.xls|All files(*.*)|*.*"  ;
   if(origin=="CallRecord")
   {
    saveFileDialog.Title="月末电话数据导入Excel";
   }
   else saveFileDialog.Title="月末信息发布数据导入Excel";
   
   saveFileDialog.FilterIndex=1;
   saveFileDialog.RestoreDirectory=true;
   if(saveFileDialog.ShowDialog()==DialogResult.OK)
   {
    
    string fName=saveFileDialog.FileName;
    File fSaveAs=new File(fName);
    fSaveAs.WriteFile(fName);

   }//if()
   excel.Workbooks.Close();
   excel.Quit();//关闭excel程序
  }//try
  catch(System.Exception e)
  {

   System.Console.WriteLine("something wrong happened about excel excution or dababase operation ",e);
  }
  
 
    }//connect
 
       /*清空当前表内容*/
          private void DeleteRecord(string record)
        {   
        SqlConnection connection=creCon();
        connection.Open();
           string DeleteString="delete from "+record;
        SqlCommand deleteCommand=new SqlCommand(DeleteString,connection);
        deleteCommand.ExecuteNonQuery();
        connection.Close();
    }

         /*数据库连接函数*/
            public static SqlConnection creCon()
          {
               string sql="server=127.0.0.1;uid=sa;pwd=;database=zhaoxia";
               SqlConnection con=new SqlConnection (sql);
               return con;
           }
         /*主函数*/
      static void Main ( )
      {
        new IntroduceExcel ( )  ;
      }

        /*文件操作类定义*/
 public class File
 {
  string fileName;
  public File(string fileName)
  {
   this.fileName=fileName;
  }

  public string ReadFile()
  {
   try
   {
    StreamReader sr=new StreamReader(fileName,Encoding.Default);
    string result=sr.ReadToEnd();
    sr.Close();
    return result;
   }
   catch(Exception e){MessageBox.Show(e.Message);}
   return null;
  }

  public void WriteFile(string str)
  {
   try
   {
    StreamWriter sw=new StreamWriter(fileName,false,Encoding.Default);
    sw.Write(str);
    sw.Close();
   }
   catch(Exception e){MessageBox.Show(e.Message,"保存文件出错！");}
  }
 }//file类

}