Question

I have read TONS of tutorials, articles and whatever regarding my issue and honestly, due to my lack of experience I can’t twist my fingers around this one so I hope some of you guys can help me out 🙂

I am working on a project (simply to learn how to program so it’s probably very basic), but I have this “News” page where I can update and delete data using a GridView.

Now I would like to INSERT something into my database using 3 textboxes and 1 submit button.

I have 3 rows that has to be inserted:

1. Headline
2. Date
3. Content/the news itself.

Which are stored under NyhedTB from the connectionstring: BoligStjernenConnectionString

My query looks like this:

INSERT INTO [NyhedTB] ([NyhedDato], [NyhedTitel], [NyhedTekst])
VALUES (@NyhedDato, @NyhedTitel, @NyhedTekst)

I read on the internet that this code should do the magic for me (I will have to insert my own values ofc.):

static void Insert()
{
    try
    {
        string connectionString =
            "server=.;" +
            "initial catalog=employee;" +
            "user id=sa;" +
            "password=sa123";
        using (SqlConnection conn =
            new SqlConnection(connectionString))
        {
            conn.Open();
            using (SqlCommand cmd =
                new SqlCommand("INSERT INTO EmployeeDetails VALUES(" +
                    "@Id, @Name, @Address)", conn))
            {
                cmd.Parameters.AddWithValue("@Id", 1);
                cmd.Parameters.AddWithValue("@Name", "Amal Hashim");
                cmd.Parameters.AddWithValue("@Address", "Bangalore");

                int rows = cmd.ExecuteNonQuery();

                //rows number of record got inserted
            }
        }
    }
    catch (SqlException ex)
    {
        //Log exception
        //Display Error message
    }
}

I looked at this code and thought it should be easy enough but really, I can’t figure it out.

Answer 1

Here is some advice to get you going, learning programming is a lot of
trial and error.

1. Start off basic, litrally put three textboxes on a form/page and a
   button.

2. Double click the button to go the code-behind and view the buttons
   click event.

3. Paste in the body of code included with your question (everything in the try-catch).

4. Put a break-point on the Public Void Button_Click line of code and press F11 to
   step through the code.

“one thing is having the code-behind working but how to make the buttons and textboxes working is still a misery”*

Put the textbox as the value rather than your hardcoded values:

cmd.Parameters.AddWithValue(“@Address”, textBox1.Text);

You also should not insert the Id value, instead modify the EmployeeDetails table and set the ID column to in the properties set Identity Specification (IS Identity) = True. Then right click the ID column and set Primary Key.

Post any error messages you encounter here and when you do get get it working, an additional exercise (that will be very valuable for you) would use a database stored procedure rather than ad-hoc SQL, to safe-guard against sql-injection attacks.

I’m assuming you have SQL Server installed and have a ’employee’ database with a table called EmployeeDetails.