如何操作Excel

--添加引用 com 里面 Microsoft Excel 11.0 Object Library
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Office.Interop;
using System.Reflection;
using System.Data.SqlClient;
namespace ConsoleApplication1
{
    class Program
    {
        string ConnectionString = "server=.;uid=sa;pwd=sasa;database=pubs";

        static void Main(string[] args)
        {
         
          
            Microsoft.Office.Interop.Excel.Application xApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

            xApp.Visible = true;
            //得到WorkBook对象, 可以用两种方式之一: 下面的是打开已有的文件 
            Microsoft.Office.Interop.Excel.Workbook xBook = xApp.Workbooks._Open(@"c:\1.xls",
                Missing.Value, Missing.Value, Missing.Value, Missing.Value
                , Missing.Value, Missing.Value, Missing.Value, Missing.Value
                , Missing.Value, Missing.Value, Missing.Value, Missing.Value);
            //xBook=xApp.Workbooks.Add(Missing.Value);//新建文件的代码 
            //指定要操作的Sheet，两种方式： 

            Microsoft.Office.Interop.Excel.Worksheet xSheet = (Microsoft.Office.Interop.Excel.Worksheet)xBook.Sheets[1];
            //Excel.Worksheet xSheet=(Excel.Worksheet)xApp.ActiveSheet; 

            //读取数据，通过Range对象 
            //Microsoft.Office.Interop.Excel.Range rng1 = xSheet.get_Range("A1", Type.Missing);
            //Console.WriteLine(rng1.Value2);

            for (int i = 2661; i < 4615; i++)
            {
                //读取，通过Range对象，但使用不同的接口得到Range 
                Microsoft.Office.Interop.Excel.Range rng2 = (Microsoft.Office.Interop.Excel.Range)xSheet.Cells[i, 1];
             //   Console.WriteLine(rng2.Value2);
                Program pro = new Program();
             
                //写入数据 
                Microsoft.Office.Interop.Excel.Range rng3 = xSheet.get_Range("B"+i, Missing.Value);
                rng3.Value2 = pro.select(rng2.Value2.ToString());
            }
        //    Console.Read();

        

            //保存方式一：保存WorkBook 
            xBook.SaveAs(@"c:\2.xls",
                Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value,
                Missing.Value, Missing.Value);
            Console.WriteLine("aa");
            Console.Read();
        }
        public string select(string name)
        {
            using (SqlConnection conn = new SqlConnection(ConnectionString))
            {
                conn.Open();
                string strsql = string.Format("select * from jobs", name);
                using (SqlCommand cmd = new SqlCommand(strsql,conn))
                {
                    using (SqlDataReader sda = cmd.ExecuteReader())
                    {
                        if (sda.Read())
                        {
                            return sda["job_desc"].ToString();
                        }
                        else
                        {
                            return "";
                        }
                    }
                }
            }
        }
    }
}