Excel导入SQL数据库完整代码

protected void studentload_Click(object sender, EventArgs e)
        {//批量添加学生信息
           SqlConnection conn = DB.dataBaseConn();//链接数据库
           conn.Open();
             try
             {
               string fileurl = typename(studentFileUpload);//调用typename方法取得excel文件路径
               DataSet ds = new DataSet();//取得数据集
               ds = xsldata(fileurl);
               int errorcount = 0;//记录错误信息条数
               int insertcount = 0;//记录插入成功条数
               int updatecount = 0;//记录更新信息条数
                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
               {
                   string stuid = ds.Tables[0].Rows[i][0].ToString();
                   string stuname = ds.Tables[0].Rows[i][1].ToString();
                   string stusex = ds.Tables[0].Rows[i][2].ToString();
                   string zhuanye = ds.Tables[0].Rows[i][3].ToString();
                   string classname = ds.Tables[0].Rows[i][4].ToString();
                   if (stuid != "" && stuname != "" && stusex != "" && zhuanye != "" && classname != "")
                   {
                                    SqlCommand selectcmd = new SqlCommand("select count(*) from zy_class   where zhuanye='" + zhuanye + "'and classname='" + classname + "'", conn);
                       int count = Convert.ToInt32(selectcmd.ExecuteScalar());
                       if (count > 0)
                       {
                           SqlCommand selectcmd2 = new SqlCommand("select count(*) from stud where   stuid='" + stuid + "'", conn);
                          int count2 = Convert.ToInt32(selectcmd2.ExecuteScalar());
                           if (count2 > 0)
                           {
                               SqlCommand updatecmd = new SqlCommand("update stud set   stuname='" + stuname + "',stusex='" + stusex + "',zhuanye='" + zhuanyei + "',classname='" + classname + "'   where stuid='" + stuid + "'", conn);
                              updatecmd.ExecuteNonQuery();
                               updatecount++;
                           }
                          else
                          {
                               SqlCommand insertcmd= new SqlCommand("insert into stud    values('" + stuid + "','" + stuname + "','" + stusex + "','" + zhuanye + "','" + classname+ "')", conn);
                               insertcmd.ExecuteNonQuery();
                               insertcount++;
                           }
                       }
                       else
                       {
                           Response.Write("<script language='javascript'>alert('专业或班级信息有错！导入失败！请检查！');</script>");
                           break;  
  
                       }
                   }
                  else
                   {
                       errorcount++;
                   }
              }
               Response.Write("<script language='javascript'>alert('" + insertcount + "条数据导入成功！" + updatecount + "条数据更新成功！" + errorcount + "条数据部分信息为空没有导入！');</script>");
           }
           catch (Exception e)
           {
               Response.Write("<script language='javascript'>alert('导入失败！');</script>");
           }
           finally
           {
             conn.Close();
           }    
       }
  
  //把EXCEL文件上传到服务器并返回文件路径
  
  private String typename(FileUpload fileloads)
       {
           string fullfilename = fileloads.PostedFile.FileName;
           string filename = fullfilename.Substring(fullfilename.LastIndexOf("\\") + 1);
          string type = fullfilename.Substring(fullfilename.LastIndexOf(".") + 1);
           string murl = "";
           if (type == "xls")
          {
               fileloads.PostedFile.SaveAs(Server.MapPath("excel") + "\\" + filename);
              murl = (Server.MapPath("excel") + "\\" + filename).ToString();
           }
           else
           {
               Response.Write("<script language='javascript'>alert('导入文件格式不对!');</script>");
  
           }
           return murl;
       }
  
      //把excel数据读入dataset返回l数据集
       private DataSet xsldata(string filepath)
       {
          string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'";
          System.Data.OleDb.OleDbConnection Conn = new System.Data.OleDb.OleDbConnection(strCon);
          string strCom = "SELECT * FROM [Sheet1$]";
          Conn.Open();
          System.Data.OleDb.OleDbDataAdapter myCommand = new System.Data.OleDb.OleDbDataAdapter(strCom, Conn);
           DataSet ds = new DataSet();
          myCommand.Fill(ds, "[Sheet1$]");
          Conn.Close();
          return ds;
     }