无法打开登录请求的数据库“binarystream”。登录失败

Question

我正在尝试使用.net连接到SQL EXPRESS数据库。我也得到错误无法打开数据库＆＃34; binarystream＆＃34;登录请求。登录失败。

但我的dataconnect已显示我已连接到databaseenter

这是我的C＃代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            SqlConnection dee= new SqlConnection("Data Source=(local)\SQLEXPRESS;Initial Catalog=binarystream;Integrated Security=True");
            SqlDataAdapter da = new SqlDataAdapter();
            da.InsertCommand = new SqlCommand("INSERT INTO CUSTOMER VALUES(@USERNAME,@PASSWORD)",dee);
            da.InsertCommand.Parameters.Add("@username", SqlDbType.VarChar).Value = textBox1;
            da.InsertCommand.Parameters.Add("@password", SqlDbType.VarChar).Value = textBox2;
            dee.Open();
            da.InsertCommand.ExecuteNonQuery();
            dee.Close();

        }
    }
}