casting problem

[Guest]

hey all,
the statement below is giving me a problem and i'm not sure why:
medDrp.SelectedIndex = (ViewState["test"] == null) ? -1 : ViewState["test"];

the message is saying that i can't implicitly convert an object to int, Huh?

thanks,
rodchar

 

[Marc Gravell]

It doesn't trust you that ViewState["test"] is an int - try

medDrp.SelectedIndex = ViewState["test"] == null ? -1 : (int)
ViewState["test"];

Marc

 

[Guest]

thank you very much for the help.

 

[Tom Spink]

hey all,
the statement below is giving me a problem and i'm not sure why:
medDrp.SelectedIndex = (ViewState["test"] == null) ? -1 :
ViewState["test"];

the message is saying that i can't implicitly convert an object to int,
Huh?

thanks,
rodchar

Hi rodchar,

You may be interested to know that you can compact that statement (if you're
using in C# 2.0) down to:

///
medDrp.SelectedIndex = (int) (ViewState["test"] ?? -1);
///

Where ?? is the null coalessence operator, and tests for nullity on the
first component, returning the second component if null and simply the
first if not.

 

[Guest]

Awesome, thank you everyone again for this help.

hey all,
the statement below is giving me a problem and i'm not sure why:
medDrp.SelectedIndex = (ViewState["test"] == null) ? -1 :
ViewState["test"];

the message is saying that i can't implicitly convert an object to int,
Huh?

thanks,
rodchar

Hi rodchar,

You may be interested to know that you can compact that statement (if you're
using in C# 2.0) down to:

///
medDrp.SelectedIndex = (int) (ViewState["test"] ?? -1);
///

Where ?? is the null coalessence operator, and tests for nullity on the
first component, returning the second component if null and simply the
first if not.

--
Hope this helps,
Tom Spink

Google first, ask later.