Interested to Buy Any Domain ? << Click Here >> for more details...
How you will set the datarelation between two columns?
- 3 Answers
- 9266 Views
- I also Faced
- E-Mail Answers
Answer Posted / swapna
ADO.NET provides DataRelation object to set relation
between two columns.It helps to enforce the following
constraints,a unique constraint, which guarantees that a
column in the table contains no duplicates and a foreign-
key constraint,which can be used to maintain referential
integrity.
A unique constraint is implemented either by simply setting
the Unique property of a data column to true, or by adding
an instance of the UniqueConstraint class to the
DataRelation object's ParentKeyConstraint.
As part of the foreign-key constraint, you can specify
referential integrity rules that are applied at three
points,when a parent record is updated,when a parent record
is deleted and when a change is accepted or rejected.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
How can we add/remove row's in "datatable" object of "dataset"?
What is ole data type?
What is variable view?
What are the connected and disconnected modes in ado.net?
What is the use of sqldatareader class?
What does executereader return?
Explain the advantages and disadvantages of using datalist?
What is sqldatasource?
How do you find the count of records in a dataset?
Explain ado.net features?
What is isolation?
How does ado.net work?
What is method to get XML and schema from Dataset? getXML() and get Schema ()
What are the different methods by which we can populate a dataset?
What is ado.net and its features?
