What is difference between sqldatareader and sqldataadapter?


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once data is fetched into dataset connection gets closed. but in datareader connection is always maintained...then why datareader is fast and mainly recommended ?

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suppose we using gridview contrl,with sqldatasource.in that for birth date how can we take validation contrl for dd/mm/yy formator how we assign regular expression for same

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What are the namespaces used in ADO.Net to connect to a database?

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What are the different ado.net namespaces are available in .net?

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