Canonicalize a path (not a URL) - C# Discussion Boards

Re: Xml Reader - Read Entire Subtree

7-Jul-08 3:48

lhayes00 wrote:
Is there a simple way to read an entire XML subtree (of a particular XML element) into a string using an object of the XmlReader class?

Why not go with XMLDocument class and use XPath to get the element and child elements. Look at the "innerXML" property to get a string representation of the entire element.

Lea Hayes7-Jul-08 4:06

Lea Hayes

7-Jul-08 4:06

Hi!

That's exactly what I needed! Big Grin | :-D

Thanks!!
Lea Hayes

Canonicalize a path (not a URL)

James R. Twine7-Jul-08 2:48

7-Jul-08 2:48

Hey all... I am working with .NET 1.1(!) and I am trying to find a method that canonicalizes a filesystem path. Basically the .NET equivilent of the Win32 Shell API function PathCanonicalize(...).

What I need to do is convert a path like:

    C:\Program Files\Company\App\User1\Data\Res<code>\..\..\..\</code>User2\Data\Media

To:

    C:\Program Files\Company\App\User2\Data\Media

   I am sure I can write code to do it (I had to in C++ before to get around the shell functions' MAX_PATH limit), but want to know if a method exists.

   Searching for "Canonicalize" in the MSDN help and in this forum does not yield anything useful.

   Adva[Thanks]nce!

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
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Kjetil Svendsen7-Jul-08 3:51

Kjetil Svendsen

7-Jul-08 3:51

Hi.

Long time since 1.1.

Have you tried the DirectoryInfo object ?

DirectoryInfo di = new DirectoryInfo(@"C:\Program Files\Company\App\User1\Data\Res\..\..\..\User2\Data\Media");

Then the di.FullName would give C:\Program Files\Company\App\User2\Data\Media

Kjetil

James R. Twine7-Jul-08 4:29

7-Jul-08 4:29

   I think that will do it!

   Thanks!

   Peace!

Vikram A Punathambekar7-Jul-08 6:17

Vikram A Punathambekar

7-Jul-08 6:17

This is what Path.GetPath() is there for (System.IO namespace). Smile | :)

Cheers,
Vikram.

The hands that help are holier than the lips that pray.

James R. Twine7-Jul-08 7:48

7-Jul-08 7:48

No such method. Perhaps you meant Path.GetFullPath(...)?

I am realizing that the documentation is lacking simple terms like "Canonicalize" unless it is talking about a URL... D'Oh! | :doh:

Peace!

Vikram A Punathambekar7-Jul-08 9:55

Vikram A Punathambekar

7-Jul-08 9:55

Apologies, I meant GetFullPath.

Still, I don't think that deserved a 1 Unsure | :~

(not from you, obviously, but some random guy)

Cheers,
Vikram.

The hands that help are holier than the lips that pray.

James R. Twine7-Jul-08 10:52

7-Jul-08 10:52

   That was me... I hit the "not helpful" button thinking it was separate from the normal rating/voting buttons on the bottom right of the message.

   Sorry.

   Peace!

Hi,How can I use Windows Media Player in Pocket PC 2003?

Vikram A Punathambekar7-Jul-08 11:45

Vikram A Punathambekar

7-Jul-08 11:45

Never mind Big Grin | :-D

As you've probably found out, you can change your votes now with the .net version of CP.

Cheers,
Vikram.

The hands that help are holier than the lips that pray.

xibeifeijian7-Jul-08 2:42

xibeifeijian

7-Jul-08 2:42

Dear all,
I want to create a mp3 player use Windows Media Player control,but I cann't find any reference assembly in my Visual Studio 2008 ,What should I do?
Thanks very much.

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Getting a raw pointer to int from unmanaged C++ - Code

Tomerland7-Jul-08 2:42

Tomerland

7-Jul-08 2:42

Dear developers,

my managed C#-Code calls an unmanaged C++-Class-Method which allocates an array of integers (int *pInt = new int [5])and returns a reference to this array.

How can I use this reference in my C#-Code without copying the values in the array.

So far I didn't find any solution.

Kind regards

Re: Getting a raw pointer to int from unmanaged C++ - Code

Luc Pattyn7-Jul-08 3:01

Luc Pattyn

7-Jul-08 3:01

Hi,

AFAIK you can't. The only way I am aware of that avoids copying is by allocating the array
on the managed side, pass it to the unmanaged side, and let it fill it there.

The rationale is the managed metadata needs to be added to the raw data, and .NET is unable
to do that for existing data.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Voting for dummies? No thanks. Dead | X|

Re: Getting a raw pointer to int from unmanaged C++ - Code

Tomerland7-Jul-08 3:26

Tomerland

7-Jul-08 3:26

seems reasonable what you say

Thanks ! !

Enum and generics

N a v a n e e t h7-Jul-08 2:22

7-Jul-08 2:22

I have a generic method which looks for a specific attribute and returns value of "Text" property. My attribute is named "DetailsAttribute". Here is my generic method

public static string GetDescription<EnumType>(EnumType enumType) {

    string description = string.Empty;

    Type type = enumType.GetType();
    if (type != null) {
       // Getting filed info
        FieldInfo info = type.GetField(enumType.ToString());
        if (info != null) {
            // getting the attributes
              DetailsAttribute[] attributes = info.GetCustomAttributes(typeof(DetailsAttribute), false)  as DetailsAttribute[];
              if (attributes != null && attributes.Length > 0)
                  description = attributes[0].Text;
        }
    }
    return description;
}

This works fine. But I am looking for applying a constraint to the generic parameter "enumType" which should allow only enum types. I am not able to write something like

public static string GetDescription<EnumType>(EnumType enumType) : where enumType : enum // error

How can I set such kind of restriction ? Also is there any better method than what I provided to retrieve attribute values from fields ?

any help would be appreciated.

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leppie7-Jul-08 2:42

leppie

7-Jul-08 2:42

N a v a n e e t h wrote:
How can I set such kind of restriction ?

You cant. Best will be to have where EnumType : struct and have a check inside the method.

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N a v a n e e t h7-Jul-08 2:50

7-Jul-08 2:50

Yeah, I guessed it. Thanks leppie. Do you think there is any better method to take the attribute value other than what I did ?

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xibeifeijian7-Jul-08 2:49

xibeifeijian

7-Jul-08 2:49

Maybe you should check it by yourself.
Just like this:

public static string GetDescription<enumtype>(EnumType enumType) {

string description = string.Empty;

Type type = enumType.GetType();

Type typParent=type.BaseType;
bool blIsEnum=false;
while(typParent!=null)
{
if(typParent==typeof(System.Enum))
{
blIsEnum=true;
break;
}
typParent=typParent.BaseType;
}

if(blIsEnum==false)
{
throw new Exception("Haha,game over!^_^");
}

......

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N a v a n e e t h7-Jul-08 2:58

7-Jul-08 2:58

Thanks.

xibeifeijian wrote:
Type type = enumType.GetType();

Type typParent=type.BaseType;
bool blIsEnum=false;
while(typParent!=null)

Why not make it simple like

if (enumType.GetType() != typeof(System.Enum))
     throw new InvalidOperationException("An enum is expected");

or am I missing something ?

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