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In c#.net.im getting invalid column name error but i have given a correct column name,how can i rectify this error [closed]

private void button1_Click(object sender, EventArgs e)

 {

      SqlConnection conn = new SqlConnection("Data Source=INBLR-RK\SQLEXPRESS;Initial Catalog=dbo.EMployee;Integrated Security=True");

      conn.Open();

      SqlDataAdapter da = new SqlDataAdapter("INSERT INTO empnew Values (" + textBox1.Text + ", '" + textBox2.Text + "', '" + textBox3.Text + "','" + textBox4.Text + "'," + textBox5.Text + ",'" + textBox6.Text + "','" + textBox7.Text + "','" + dateTimePicker1.Text + "','" + textBox8.Text + "'," + textBox9.Text + ")", conn);

      DataSet ds = new DataSet("empnew");

      da.Fill(ds);

      conn.Close();

  }

       

using(SqlConnection  connection = new SqlConnection("ConnString"))

{

   connection.Open();

   SqlCommand comm = new SqlCommand("insert into table_name(col_name) values (@value)",connection);

   comm.Parameters.AddWithValue("@value",theValue);

   comm.ExecuteNonQuery();

}