Switch

[Shevchenko7]

How is this possible? protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e) { switch (e.CommandName) { case "1": HiddenField n = (HiddenField)e.Item.FindControl("IDProizvoda"); break; case "2": n = (HiddenField)e.Item.FindControl("IDProizvoda"); break; } } In Case"2" how can compiler know that n is HiddenField?

[Luc Pattyn]

HiddenField n has been declared before in the same {} block, the one that contains all the switch cases. This may be counter-intuitive, but it is how C# looks at it. :)

Luc Pattyn

[Shevchenko7]

Thanks! :)

[gnadeem]

hi, adding to what Luc Pattyn explained, here is a remark from specification "The statement-lists of a switch-block may contain declaration statements (§15.5). The scope of a local variable or constant declared in a switch block is the switch block." please note that a statement-list has obviosly to be in a sequence and reachable.

[Vega02]

This question has already been answered, but I just wanted to add that you can use more curly braces to further delimit the scope of variables. For example: protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e) { switch (e.CommandName) { case "1": { HiddenField n = (HiddenField)e.Item.FindControl("IDProizvoda"); ... break; } case "2": { Hiddenfield n = (HiddenField)e.Item.FindControl("IDProizvoda"); ... break; } } } In your example it probably doesn't matter, but this certainly comes in handy when case blocks become larger and you want to keep your code partitioned. :)

[Shevchenko7]

Useful tip :) Thanks!