Chapter 13, Try It Out pp479+, C#

RobC · September 4th, 2006, 04:57 PM

First, I would be amazed if any reader was able to get this example working because it requires that you type hundreds of lines of code across multiple files before you can even begin testing the example out. Second, I think it would be helpful if someone at Wrox published the correct steps to get this working.

Here are a few errors:

On page 479, step 3 doesn't list all the "using" statements required for the code to work in Shopping.cs. The file in End\Chapter13\Shopping.cs does have the required using statements, but it also has this line, which is a little strange for C# book:

Code:

using Microsoft.VisualBasic;

Also starting on page 479, the CartItem class declares a property named _lineTotal. This property serves no purpose; its value is set in the constructor, but it's never used anywhere.

In the middle of page 482, this line:

Code:

_items(ItemIndex).Quantity += 1

Should be:

Code:

items(ItemIndex).Quantity += Quantity

skafando · October 24th, 2006, 12:13 PM

I did get the example to work, but I had to correct a few things:
* The using statements that you mentioned above.
* Making sure that you do the exercise in chapter 11, to get the appropriate profile attributes setup correctly
* When all else fails, compare your code to the final code in WroxUnited

DanM · October 25th, 2006, 04:13 PM

Hi Rob,

Skafando has it pretty much spot on but I wanted to chip in two cents about typing in at least most of the code in Step 3. Visual Studio has a set of shortcut 'snippets' that you can jsut insert into text and make your life much easier. You should find the Code Snippet Manager under the Tools menu or by pressing Ctrl+K, Ctrl+B.

So to insert the snippet for a property, you'd type 'prop' or whatever the shortcut for the snippet is - see the manager for that - then TAB twice and all you have to do is fill in the blanks.

One other point is that if you were writing the page from scratch, you really would have to write at least that much code before you could start testing. Again, as skafando points, we do have the final shop code available for you to cut and paste if you don't fancy it, but I found at least that typing it in meant I learnt it better.

Dan

Dan Maharry
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