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DataSet class?

Posted on 2006-11-06
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Last Modified: 2006-11-18
Which type of DataSet is derived from the base DataSet class and then uses information in an XML Schema file (.xsd file) in order to generate a new class?

Untyped DataSet
 
 
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  Typed DataSet
 
 
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  XML DataSet
 
 
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  XSD DataSet
 
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Question by:mathieu_cupryk
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Expert Comment

by:ozymandias
ID: 17885664
Not familiar with any of those classes.
Are you sure you have the names right...they have spaces in them.
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Author Comment

by:mathieu_cupryk
ID: 17885668
100 %
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Author Comment

by:mathieu_cupryk
ID: 17885685
Could it be strongly typed?
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Expert Comment

by:ozymandias
ID: 17885687
It is most likely to be TypedDataSet but he questoion is confusing.
There is no class called TypedDataSet.
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Author Comment

by:mathieu_cupryk
ID: 17885689
But it is not in the list?
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ozymandias earned 250 total points
ID: 17885699
Yes. It is Typed Dataset.
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Author Comment

by:mathieu_cupryk
ID: 17885703
Your Typed DataSet directly derives from DataSet so all the DataSet-related classes and methods will work. One of the distinct advantages of using a Typed DataSet is that elements of the DataSet are strongly typed and strongly named. The use of the new class is a little different than our old DataSet examples, as shown in Listing 6.4.

Listing 6.4: Using a Typed DataSet
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Expert Comment

by:ozymandias
ID: 17885713
Yeah, I found it too....

A typed DataSet is a class that derives from a DataSet. As such, it inherits all the methods, events, and properties of a DataSet. Additionally, a typed DataSet provides strongly typed methods, events, and properties. This means you can access tables and columns by name, instead of using collection-based methods. Aside from the improved readability of the code, a typed DataSet also allows the Visual Studio .NET code editor to automatically complete lines as you type.

Additionally, the strongly typed DataSet provides access to values as the correct type at compile time. With a strongly typed DataSet, type mismatch errors are caught when the code is compiled rather than at run time.

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Author Comment

by:mathieu_cupryk
ID: 17885759
good job boys!!!
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