无法打开登录 'Database1.mdf' 中请求的数据库。登录失败。用户 'NYIST-C31D5C229\\zj' 登录失败。

代码如下：

System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace listviewbianli2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string connectstr = "server=127.0.0.1;uid=zj;pwd=;database=Database1.mdf;Trusted_Connection=no;Integrated Security =SSPI";

private void Form1_Load(object sender, EventArgs e)
{
SqlConnection conConnecton = new SqlConnection(connectstr);
SqlDataReader reader;
string commandstr = "select * from op";
this.conConnecton.Open();
SqlCommand cmd = new SqlCommand(commandstr, conConnecton);