Hello i want to create an user control .
In that, i will have a textbox Roll Number and in a ddl i will have a selected item as Details.
I am having a table in database as students_history
When i will enter the student roll no and then select Details from ddl then it should fetch from the database the record related to that particular student and display in a table format / html/or label [ in any one of the format]
For this i need to implement call back so that working is faster. May i know how should i actually do this??