I searched the web on this topic and got plenty of suggestions from every one (including other stackoverflow threads).
Finally, I thought implement as shown exactly here.
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.repeater.onitemcommand(VS.71).aspx
Still frustrated.
My repeater is available in a user control and I added the user control as a web part to an existing webpartzone. I could see all rows in the repeater (along with buttons). Once I click the (any) button, it loses all the rows and itemcommand never fires.
I am using ASP.NET 4.0
Can anyone help me on this.
Show uz ze codeh. Like the answer below says, might help if you paste the relevant HTML and CS for the Repeater. - RPM1984