How about some short examples to demonstrate polymorphism , polymorphic code and duck-typing if possible please? From time to time I send out VB. The first two web casts were very good. However, between the second and third web cast your database, by magic, became populated.
This could lead to some problems to newbies in that they could not follow along with the remaining 6 web casts do to the lack of data in their database tables. You could loose them complexly as they might decide that entering all of the data could be too much trouble. It might be a good idea to create scripts to populate the tables and post them on the web site. Hi Beth, Just went through your video. It's really excellent. As a newbie, I found it's really faster to learn from your video series compared reading through the books.
BUT, I found there maybe a problem in the Video 3 coding. I tried to delete the record using the "Customerbinding navigator" and save it. MDF", table "dbo. Orders", column 'CustomerID'. The statement has been terminated. I've downloaded the examples 'OrderManager. Zip' but can't get them to run. Any help would be great. This is how a database maintains referential integrity.
The customer is not allowed to be deleted if there are orders. You will need to delete the orders before the customer can be deleted. You could set the referential integrity to CASCADE the deletes to the child tables but in this particular application that would be bad because we may have open or pending orders on the customer. Is there an error message? Learn More. Ask a question.
Quick access. Search related threads. Remove From My Forums. Asked by:. NET Follow. Anthony D. I remember one case pretty well. I was the new dev lead of the VB editor at the time, and I was talking Top Bloggers. Link Text. Open link in a new tab. No search term specified.
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