转：Excel导入SQL数据库完整代码

 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 = ;//记录错误信息条数
               int insertcount = ;//记录插入成功条数
               int updatecount = ;//记录更新信息条数
                for (int i = ; i < ds.Tables[].Rows.Count; i++)
               {
                   string stuid = ds.Tables[].Rows[i][].ToString();
                   string stuname = ds.Tables[].Rows[i][].ToString();
                   string stusex = ds.Tables[].Rows[i][].ToString();
                   string zhuanye = ds.Tables[].Rows[i][].ToString();
                   string classname = ds.Tables[].Rows[i][].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 > )
                       {
                           SqlCommand selectcmd2 = new SqlCommand("select count(*) from stud where   stuid='" + stuid + "'", conn);
                           int count2 = Convert.ToInt32(selectcmd2.ExecuteScalar());
                           if (count2 > )
                           {
                               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("\\") + );
           string type = fullfilename.Substring(fullfilename.LastIndexOf(".") + );
           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;
      } 

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