asp.net 中excel 导入数据库

protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["LYConnectionString"].ConnectionString); ;//链接数据库
conn.Open();
try
{
string fileurl = typename(FileUpload1);//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();
Response.Write(stuid);
Response.Write(stuname);
Response.Write(stusex);
Response.Write(zhuanye);
Response.Write(classname);

if (stuid != "" && stuname != "" && stusex != "" && zhuanye != "" && classname != "")
{
SqlCommand selectcmd = new SqlCommand("select count(*) from stud  ", 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='" + zhuanye + "',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
{
SqlCommand insertcmd = new SqlCommand("insert into  stud    values('" + stuid + "','" + stuname + "','"                       + stusex + "','" + zhuanye + "','" + classname + "')", conn);
insertcmd.ExecuteNonQuery();

//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 exp)
//{
//    Response.Write("<script language='javascript'>alert('导入失败！');</script>");
//}
finally
{
conn.Close();
}
}
//判断上传文件，并保存文件
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;
}
// 数据库导入数据集dataset
private DataSet xsldata(string filepath)
{
string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'";
//如果是导入excel2013版本，连接字符串则应该变成

string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;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;
}
}