title: "Illegal characters in path" error when connecting to SQL Server
body: <p>I'm trying to connect to database and I get the following error:</p>
  
  <blockquote>
    <p>Illegal characters in path.</p>
  </blockquote>
  
  <p>Here is my code: </p>
  
  <pre><code>private void button1_Click(object sender, EventArgs e)
  {
      SqlConnection Con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\targil3.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");
      SqlDataAdapter adapt = new SqlDataAdapter();
      adapt.InsertCommand = new SqlCommand(" INSERT INTO tblEmployee VALUES (@employeeNumber, @employeePrivateName, @employeeFamilyName ,@city, @street, @houseNo, @phoneNumber, @birthDate, @startWorkingDate)", Con);
      adapt.InsertCommand.Parameters.Add("@employeeNumber", SqlDbType.Char).Value = textBox1.Text;
      adapt.InsertCommand.Parameters.Add("@employeePrivateName", SqlDbType.VarChar).Value = textBox2.Text;
      adapt.InsertCommand.Parameters.Add("@employeeFamilyName", SqlDbType.VarChar).Value = textBox3.Text;
      adapt.InsertCommand.Parameters.Add("@city", SqlDbType.VarChar).Value = textBox4.Text;
      adapt.InsertCommand.Parameters.Add("@street", SqlDbType.VarChar).Value = textBox5.Text;
      adapt.InsertCommand.Parameters.Add("@houseNo", SqlDbType.Int).Value = textBox6.Text;
      adapt.InsertCommand.Parameters.Add("@phoneNumber", SqlDbType.Char).Value = textBox7.Text;
      adapt.InsertCommand.Parameters.Add("@birthDate", SqlDbType.DateTime).Value = Convert.ToDateTime(textBox8.Text);
      adapt.InsertCommand.Parameters.Add("@startWorkingDate", SqlDbType.DateTime).Value = Convert.ToDateTime(textBox8.Text);
  
  
      Con.Open();
      adapt.InsertCommand.ExecuteNonQuery();
      Con.Close();
  }
  </code></pre>
  
  <p>How to do I connect to the database so the I can insert into it?</p>