Diff. b/w DataReader and DataSet?
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Answer Posted / vivek
First of all both are used for storing data in the front
end.
DataReader:-
1)It is connection oriented.4
2)It is faster because every data must travels through this
object.Even dataset also accesses data through this object.
3)Its navigation is forward only and and read only object
4)It can not be connected to multiple backends at a time
because of connected oriented.
5)Data reader is having record pointer to point the record
6)At a time it can point to only record.
7)we can not know how many records are there in datareader
8) By default It does not point to any record
9)Always it takes recference from the Resultset in the
database.for every it goes to resultset and fetches record
from resultset.
10)By default it supports online update.
DataSet:-
1)It is disconnected because it doesnot know about the
datasource
2)It is slow of its fat structure
3)It is useful for the offline retriving data.
4)It indepedent of Backend
5)Once the data is accessed it is independent of backend we
can make any modifications to that data.
6)Navigation is possible in any direction
7)It doesnot have the record pointer to point record
8)Logically we have to create record pointer.
9)It can have any type of data from different databases.
10)It uses "diffgram" to store the data in the form of xml
format
11)By default it supports Batch Sql update
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