我的SQL Server Express数据库不会保存参数

Question

我不知道似乎有什么问题，请尽可能帮忙，任何人都可以吗？

try
{
     string Connectionstring = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True; User Instance=True";

     SqlConnection cnn = new SqlConnection(Connectionstring);
     cnn.Open();

     SqlCommand cmd1 = new SqlCommand("insert into users values('" + textBox1.Text + "','" + textBox2.Text + "','" + textBox3.Text  + "','" + textBox4.Text + "',' " + int.Parse(textBox5.Text) +  " ')", cnn);
     SqlDataReader dr1 = cmd1.ExecuteReader();
     dr1.Close();
     cmd1.ExecuteNonQuery();

     int count = cmd1.ExecuteNonQuery();

     if (count > 0)
           MessageBox.Show(" Record inserted " + count );

     cnn.Close();
 }