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I had an interview Question .
Q. how to improve performance of a Gridview contains 100000 Records of data(Datasource might be XML or DB) in c# asp.net ?
I was just blinking as i had no answer for this .Please Give me the solution for this. If possible please give one demo.
No gridview should contain 100000 records.
Your data source may contain 10 times that number of records, it doesn’t matter. If you present a user more than 100 records on screen, it would be difficult to work with that data.
Select a datasource that supports paging for the gridview, that way you are only working with the number of records to be displayed on screen.
For a database you can use something like SqlDataSource.
The default XmlDataSource does not support paging, in such cases the grid will have all records in memory and handle paging itself. For xml with large number of records consider using an ObjectDataSource, where you can implement paging yourself.
If you have a choice, always select a data source that supports paging.