Hi, You can use the code in the code behind: for (int i = 0; i < TableID.Rows.Count; i++) { CheckBox chk = (CheckBox)TableID.Rows[i].FindControl("CheckBoxId"); if(chk.Checked) // checkbox checked else // not check } I hope it help for you

Many Many Thanks. You give me a great great hand.

Thanks you. It helps.

So many thanks for tarunbounthiyal and Apurva Kaushal's kindly help. I successfully create the pop up window la.

Dude, you need to do a lot more than that. I don't know if your government allows direct access to Microsoft information sites, but if so, start here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconOptimisticConcurrency.asp[^] Then try to read as much as you can of what else is there. They also have examples. Good luck.

Oh. I get the answer la. It should be select * from TABLE1 A INNER JOIN TABLE2 B ON A.STUDENT_ID = B.STUDENT_ID INNER JOIN TABLE3 C ON A.CLASS_ID = C.CLASS_ID INNER JOIN TABLE4 E ON A.FORM_ID = E.FORM_ID INNER JOIN TABLE5 D On D.SCHOOL_ID = E.SCHOOL Thanks

You are not defining B as an alias.