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("");
break;  

                       }
                   }
else
                   {
                       errorcount++;
                   }
              }
               Response.Write("");
           }
catch (Exception e)
           {
               Response.Write("");
           }
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("");

           }
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;
     }