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Auto generate No. Problem !!!!

Posted By:      Posted Date: September 26, 2010    Points: 0   Category :ASP.Net


I am facing a problem .i think someone must solved it.actually I developing a college project. There are a DueCollection page in which one of the column is challan No.Challan No is unique and Auto Generate.

Problem is  in Challan No.suppose 5 user are working in same page then one Challan No is generate and save in database which is a serious problem for me.

What I do,I have a textbox which I generate a maximum challan no from database.suppose maximum challno is 100 and when 5 user are open the same page 100 is show to 5 user and suppose one user is save one record  then  it should be convert 101 to 4 user but it not be.100 is save 5 times in database. I can't  found any solution .the biggest problem is Challno Textbox  is visible.user must see .

How can I manage the same?please someone help me.



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