Convert type 'int?[]' to 'int[]'

[Stuart Shay]

Hello all

I have the following LINQ Query

int?[] reviews = (from Review review in bk.Reviews
where (review.Book == bk.ID)
select review.Rating).ToArray();
I need to bind the results to a control that only excepts int[]

If the array in not empty how do I Cast the int?[] array to int[]

Thanks
Stuart

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Stuart Shay wrote:

I have the following LINQ Query

int?[] reviews = (from Review review in bk.Reviews
where (review.Book == bk.ID)
select review.Rating).ToArray();
I need to bind the results to a control that only excepts int[]
If the array in not empty how do I Cast the int?[] array to int[]

There must be several ways.

First that came to my mind was:

int[] reviews2 = reviews.Cast<int>().ToArray();

Arne

[Peter Duniho]

On Sat, 25 Oct 2008 20:33:38 -0700, Michael B. Trausch <mi**@trausch.us>
wrote:

>int[] reviews2 = reviews.Cast<int>().ToArray();

What does that do, precisely? I didn't know Nullable<Thad a generic
Cast method. Is that some sort of extension? I don't see it in MSDN.

It's part of the Enumerable class from LINQ:

http://msdn.microsoft.com/en-us/library/bb341406.aspx

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Stuart Shay wrote:

Hello all
I have the following LINQ Query

int?[] reviews = (from Review review in bk.Reviews
where (review.Book == bk.ID)
select review.Rating).ToArray();
I need to bind the results to a control that only excepts int[]
If the array in not empty how do I Cast the int?[] array to int[]

Thanks
Stuart

There is no way to cast an int? array to an int array (not even using
unsafe code), as an int? is not the same size as an int.

You have to create a new array and copy each value to it. There are of
course many different ways of doing that, but there is no way around it.

--
Göran Andersson
_____
http://www.guffa.com

[=?ISO-8859-1?Q?Bj=F8rn_Brox?=]

Göran Andersson skrev:

Stuart Shay wrote:

>Hello all
I have the following LINQ Query

int?[] reviews = (from Review review in bk.Reviews
where (review.Book == bk.ID)
select review.Rating).ToArray();
I need to bind the results to a control that only excepts int[]
If the array in not empty how do I Cast the int?[] array to int[]

Thanks
Stuart

There is no way to cast an int? array to an int array (not even using
unsafe code), as an int? is not the same size as an int.

You have to create a new array and copy each value to it. There are of
course many different ways of doing that, but there is no way around it.

Secondly you have to make a decision on what value to use in the int
array, or if you want to leave them out when you find (int?[n]
== null) (!int?[n].HasValue)
--
Bjørn Brox

[=?UTF-8?B?QXJuZSBWYWpow7hq?=]

Michael B. Trausch wrote:

On Sat, 25 Oct 2008 22:40:17 -0400
Arne Vajhøj <ar**@vajhoej.dkwrote:

>Stuart Shay wrote:

>>I need to bind the results to a control that only excepts int[]
If the array in not empty how do I Cast the int?[] array to int[]

There must be several ways.

First that came to my mind was:

int[] reviews2 = reviews.Cast<int>().ToArray();

What does that do, precisely? I didn't know Nullable<Thad a generic
Cast method. Is that some sort of extension? I don't see it in MSDN.

Yes - it is an extension method.

But since you use LINQ then you must be on .NET 3.5 !

Arne