Question

I usually use expressions like this

CommandArgument='<%# Container.DataItemIndex.ToString() %> '

But I could not find Container in the msdn, can u help?

Thanks

Answer 1

Container is a keyword that is only applicable to data binding expressions and is a reference to the naming container.

See this from MSDN (How to: Access Members of a Control’s Naming Container):

In the data-binding expression, use the Container keyword, which returns a reference to the container.

And this (Using the NamingContainer Property to Determine a Control’s Naming Container):

… the Container keyword, which is available only in inline code (that is, in a declarative <%# %> expression) …