File checksum

[Jesper.]

Hi,

Once I heard something about a files checksum. Is there a
smart way to verify to some degree that the content of a
file has not been changed in C#.

best regards Jesper.

[Dmitriy Lapshin [C# / .NET MVP]]

Re: File checksum

Hi,

You can compute a hash value (MD5 or SHA) on a file content, store it
somewhere and then re-compute the hash and compare to the stored value. If
they are not equal, the file has changed. .NET Framework has a built-in
implementation for hash computation in the System.Security .Cryptography
namespace.

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio

http://x-unity.miik.com.ua/teststudio.aspx

Bring the power of unit testing to VS .NET IDE

"Jesper." <anonymous@disc ussions.microso ft.com> wrote in message
news:055001c3ad ca$76d3fff0$a40 1280a@phx.gbl.. .[color=blue]
> Hi,
>
> Once I heard something about a files checksum. Is there a
> smart way to verify to some degree that the content of a
> file has not been changed in C#.
>
> best regards Jesper.[/color]

[Jochen Kalmbach]

Re: File checksum

Jesper. wrote:
[color=blue]
> Once I heard something about a files checksum. Is there a
> smart way to verify to some degree that the content of a
> file has not been changed in C#.[/color]

The recommended way is to use a CVS-System like (CVS, PVCS, SourceSafe,
ClearCase, ...)

--
Greetings
Jochen

Do you need a memory-leak finder ?

http://www.codeproject.com/tools/leakfinder.asp

[csharpguru@linhnguyen.com]

Re: File checksum


Hash the file content.

To check for file modification:
Rehash the file content and compare to the above

<Linh Nguyen />
[color=blue]
>-----Original Message-----
>Jesper. wrote:
>[color=green]
>> Once I heard something about a files checksum. Is there[/color][/color]
a[color=blue][color=green]
>> smart way to verify to some degree that the content of[/color][/color]
a[color=blue][color=green]
>> file has not been changed in C#.[/color]
>
>The recommended way is to use a CVS-System like (CVS,[/color]
PVCS, SourceSafe,[color=blue]
>ClearCase, ...)
>
>--
>Greetings
> Jochen
>
> Do you need a memory-leak finder ?
> http://www.codeproject.com/tools/leakfinder.asp
>.
>[/color]