This chapter focuses on copying data between ADO.NET classes and between ADO and ADO.NET classes, serializing and deserializing data, and encrypting data and login credentials to build secure applications.
Copying rows from one
DataTable to another and
copying tables from one
DataSet to another are
operations performed frequently in data-centric applications. Recipe 5.1 and Recipe 5.2 show
different ways to copy data and discuss the advantages, limitations,
and disadvantages of the different approaches.
DataReader provides connected forward-only,
read-only access to a data stream while the
DataSet provides disconnected access to data
stored as an in-memory relational database. There is no built-in
method to convert a
DataReader to a
DataSet, so Recipe 5.3
shows how it’s done.
In addition, this chapter covers:
Serialization allows data conversion to a format that can be
persisted or transported. The .NET framework supports serialization
and deserialization with the
System.Runtime.Serialization namespace. Support
for binary, XML, and SOAP formats is built in and serialization can
easily be customized if required. Recipe 5.4 and Recipe 5.5 show how to
serialize and deserialize data.
As well as copying data, ADO.NET supports merging disconnected data
into each other. Recipe 5.6 shows how
merging works and how to use the arguments that control the merge