Can anyone show me an example of how to use the Array.ConstrainedCopy
method. The MSFT example is worthless.

Hi,

What MSFT example do you mean?

It's basically the same thing as Copy except it ensures that the operation
is atomic, so that in the case of an exception it will leave the destination
array in the state that it was in before the operation was attempted.
Other, more subtle differences between the Copy and the ConstrainedCopy
methods are explained in the following documentation:

Array.ConstrainedCopy Method
http://msdn2.microsoft.com/en-us/lib...ainedcopy.aspx

Here's a simple example:

int[] array1 = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int[] array2 = new int[20];

Array.ConstrainedCopy(array1, 0, array2, 5, 10);

for (int i = 0; i < array2.Length; i++)
{
Console.WriteLine("{0}: {1}", i, array2[i]);
}

Output:

0: 0
1: 0
2: 0
3: 0
4: 0
5: 1
6: 2
7: 3
8: 4
9: 5
10: 6
11: 7
12: 8
13: 9
14: 10
15: 0
16: 0
17: 0
18: 0
19: 0

--
Dave Sexton
http://davesexton.com/blog

"JPS" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can anyone show me an example of how to use the Array.ConstrainedCopy
> method. The MSFT example is worthless.
>

Thanks very much

On Dec 28, 11:41 am, "Dave Sexton" <dave@jwa[remove.this]online.com>
wrote:
> Hi,
>
> What MSFT example do you mean?
>
> It's basically the same thing as Copy except it ensures that the operation
> is atomic, so that in the case of an exception it will leave the destination
> array in the state that it was in before the operation was attempted.
> Other, more subtle differences between the Copy and the ConstrainedCopy
> methods are explained in the following documentation:
>
> Array.ConstrainedCopy Methodhttp://msdn2.microsoft.com/en-us/library/system.array.constrainedcopy...
>
> Here's a simple example:
>
> int[] array1 = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
> int[] array2 = new int[20];
>
> Array.ConstrainedCopy(array1, 0, array2, 5, 10);
>
> for (int i = 0; i < array2.Length; i++)
> {
> Console.WriteLine("{0}: {1}", i, array2[i]);
>
> }Output:
>
> 0: 0
> 1: 0
> 2: 0
> 3: 0
> 4: 0
> 5: 1
> 6: 2
> 7: 3
> 8: 4
> 9: 5
> 10: 6
> 11: 7
> 12: 8
> 13: 9
> 14: 10
> 15: 0
> 16: 0
> 17: 0
> 18: 0
> 19: 0
>
> --
> Dave Sextonhttp://davesexton.com/blog
>
> "JPS" <jpsu...@yahoo.com> wrote in messagenews:(E-Mail Removed)...
>
>
>
> > Can anyone show me an example of how to use the Array.ConstrainedCopy
> > method. The MSFT example is worthless.- Hide quoted text -- Show quoted text -

Hi Peter,

Yes, I did not mean atomic as in thread-safe, I meant atomic as in a
transaction.

--
Dave Sexton
http://davesexton.com/blog

"Peter Ritchie [C# MVP]" <(E-Mail Removed)> wrote in message
news:6E25A35E-FD0B-441A-96F2-(E-Mail Removed)...
> ConstrainedCopy is not documented to be atomic and it is not documented to
> be
> thread safe. It's meant to be used when you want to ensure the
> destination
> array will not be corrupt in the presence of an exception.
> --
> Browse http://connect.microsoft.com/VisualStudio/feedback/ and vote.
> http://www.peterRitchie.com/blog/
> Microsoft MVP, Visual Developer - Visual C#
>
>
> "Dave Sexton" wrote:
>
>> Hi,
>>
>> What MSFT example do you mean?
>>
>> It's basically the same thing as Copy except it ensures that the
>> operation
>> is atomic, so that in the case of an exception it will leave the
>> destination
>> array in the state that it was in before the operation was attempted.
>> Other, more subtle differences between the Copy and the ConstrainedCopy
>> methods are explained in the following documentation:
>>
>> Array.ConstrainedCopy Method
>> http://msdn2.microsoft.com/en-us/lib...ainedcopy.aspx
>>
>> Here's a simple example:
>>
>> int[] array1 = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
>> int[] array2 = new int[20];
>>
>> Array.ConstrainedCopy(array1, 0, array2, 5, 10);
>>
>> for (int i = 0; i < array2.Length; i++)
>> {
>> Console.WriteLine("{0}: {1}", i, array2[i]);
>> }
>>
>> Output:
>>
>> 0: 0
>> 1: 0
>> 2: 0
>> 3: 0
>> 4: 0
>> 5: 1
>> 6: 2
>> 7: 3
>> 8: 4
>> 9: 5
>> 10: 6
>> 11: 7
>> 12: 8
>> 13: 9
>> 14: 10
>> 15: 0
>> 16: 0
>> 17: 0
>> 18: 0
>> 19: 0
>>
>> --
>> Dave Sexton
>> http://davesexton.com/blog
>>
>> "JPS" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>> > Can anyone show me an example of how to use the Array.ConstrainedCopy
>> > method. The MSFT example is worthless.
>> >
>>
>>
>>