Button in a DataList causes 'Invalid postback or callback argument'

[Mufasa]

I have a datagrid where in the item template I have a button. No matter what
I put in the button, I get the dreaded Invalid Posterback or Callback
Argument error.

Any ideas on how to fix it?

TIA - J.

 

[Mufasa]

Turns out I had a routine called Page_PreLoad instead of calling it
Page_PreRender. Now it works.

TIA - Jeff.