Validate the dataitem in repeater,datalist control

Hi Everybody

Question is, how to validate the item that are binded in the repeater,datalist control.

For Example,
Binded five items in the repeater control,among the five item one is containing NULL value.So in that place validate the <container.dataitem("fieldname")> .

if it is NULL jump to process1 else jump to process2.

If anyone knows or across this problem just send the solution.

Any help regd in this issue is highly grateful.

Cheers
GSKInstead of directly binding to container.dataitem("fieldname") bind to a function and pass the container.dataitem("fieldname") as a parameter to it. Within the function check for null and act appropriately