Copying and Pasting cs Code

In cs, like in almost any computer programming language, reading data from a file can be tricky. You add extra lines of code to tell the computer what to do. Sometimes you can copy and paste these lines from other peoples’ code.

For example, you can follow the pattern in this listing:

         private void txtCustomers_TextChanged(object sender, EventArgs e)
         {
             try
             {
                 con = new SqlConnection(cs.DBConn);
                 con.Open();
                 cmd = new SqlCommand("SELECT RTRIM(CustomerID)as [Customer ID],RTRIM(Customername) as [Customer Name],RTRIM(address) as [Address],RTRIM(city) as [City],RTRIM(ContactNo) as [Contact No.],RTRIM(ContactNo1) as [Contact No. 1],(email) as [Email],(notes) as [Notes] from Customer where CustomerName like '" + txtCustomers.Text + "%' order by CustomerName", con);
                 SqlDataAdapter myDA = new SqlDataAdapter(cmd);
                 DataSet myDataSet = new DataSet();
                 myDA.Fill(myDataSet, "Customer");
                 dataGridView1.DataSource = myDataSet.Tables["Customer"].DefaultView;

                 con.Close();
             }
             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }