Answer / janardan baghla

View state is the object which is used to store the values
of a particular page during postback.It stores the values
in a hidden form field in form of string.And if again page
is loaded then it reloads the values of the controls on
particular page from the viewstate.Validation controls are
execute on clien-side.They contains isValid property which
is used to valid the control.Then it executes on the server.

Answer / siddheshwar duchal mob- +91 97

ViewState allows the state of objects (serializable) to be
stored in a hidden field on the page. ViewState is
transported to the client and back to the server, and is not
stored on the server or any other external source. ViewState
is used the retain the state of server-side objects between
postabacks.
Item stored in ViewState exist for the life of the current
page. This includes postbacks (to the same page).
"EnableViewState" :- It allows the page to save the users
input on a form across postbacks. It saves the server-side
values for a given control into ViewState, which is stored
as a hidden value on the page before sending the page to the
clients browser. When the page is posted back to the server
the server control is recreated with the state stored in
viewstate.

The validation can be handeled on client side.

Answer / zohaib shahid

The validation can be handeled on client side as well as on
the server side, and depends on the situation. Although the
client side validation can be handeled by the Java Script..

You need to be able to retrieve data from DataSet object that has four DataTable objects. There are currently UniqueConstraint and ForeignKeyConstraint Object on the DataTable objects to enforce the data rules. You find that you can retrieve the data from the individual DataTable objects, but you are not able to retrieve the data from the combination of DataTable objects in a Parent/Child manner. What should you do to able to retrieve the data in a Parent/Child manner? a) Set the EnforceParentChild parameter of the DataSet to True. b) Set the EnforceRelation parameter of the Relations collection to True. c) Add DataRelation objects to the Relations Collection to make the DataSet present the data in Parent/Child manner. d) Add a primary key and a foreign key to each of the DataTable objects that should present the data in a Parent/Child manner.

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