I'm using Assembly.LoadFrom as the assemblies are "Add-Ins" that reside on a shared folder where they are used by both the front end and a back end component, the Custom attribute class is compiled into a single assembly and not separately for each object.
I will try to see what happens if all of the files are placed into a single folder, however that is not a perfect solution -----Original Message----- From: Eric Gunnerson [mailto:[EMAIL PROTECTED] Sent: 23 January 2004 08:23 To: [EMAIL PROTECTED] Subject: Re: [ADVANCED-DOTNET] Casting Problem Assembly.Load should give you the same identity. Assembly.LoadFrom() *may* give you a different identity, though the runtime will try an assembly.Load() first, and if that succeeds, it would have the same identity. I'm presuming that the custom attribute class only exists in one dll, and that you aren't compiling it separately into different assemblies. -----Original Message----- From: Moderated discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] On Behalf Of Heath Ryan Sent: Friday, January 23, 2004 8:30 AM To: [EMAIL PROTECTED] Subject: Re: [ADVANCED-DOTNET] Casting Problem Hi Paul, Just a wild guess, Are you using Assembly.Load ? And those assemblies are within different directories than your application? Assemblies (different directory) explicitly loaded with this function are not considered the same as the assemblies (app directory) that were loaded implicitly by the CLR. HTH // Ryan -----Original Message----- From: Paul Stevens To: [EMAIL PROTECTED] Sent: 1/23/2004 1:03 PM Subject: [ADVANCED-DOTNET] Casting Problem I've got a very weird problem, Basically I have the following setup, 1. a Custom attribute class 2. a DLL that uses the custom attribute 3. a reader that checks a DLL for the custom attributes class System.Attribute.IsDefined(t,typeof(Multichoice.Attributes.RuntimeConfig )) 4. when the attribute is discovered it is collected and cast into a waiting variable config = (Multichoice.Attributes.RuntimeConfig)Attribute.GetCustomAttribute(t,typ eof( Multichoice.Attributes.RuntimeConfig)); in most cases step 3 returns false and step 4 fails even when the object is the type it is being cast to or the attribute does exist, this can be confirmed by collecting the attributes from the type, even if I collect the attributes from the type and find the correct attribute in the array the cast fails, the objects can not be different as there is only on version of the attribute DLL on the machine, in fact there is only one copy of the attribute dll on the machine, but still it fails??, both the DLL using the attribute and the component interrogating for the attribute reference the same file build using the same file reside in the same folder, why does .NET insist that the following types are not the same A. Multichoice.Attributes.RuntimeConfig, Multichoice.Attributes, Version=1.1.2004.17827, Culture=neutral, PublicKeyToken=aa94827d81467af7 B. Multichoice.Attributes.RuntimeConfig, Multichoice.Attributes, Version=1.1.2004.17827, Culture=neutral, PublicKeyToken=aa94827d81467af7 Paul Stevens Analyst Developer MultiChoice Africa Cellular: * +27 (0) 82 413 3171 Phone: * +27 (0) 11 289 3576 Fax: * +27 (0) 82 131 413 3171 Mail: * [EMAIL PROTECTED] ************************************************************************ ************************************************** Everything in this e-mail and attachments relating to the official business of MultiChoice Africa is proprietary to the company. Any view or opinion expressed in this message may be the view of the individual and should not automatically be ascribed to the company. If you are not the intended recipient, you may not peruse, use, disseminate, distribute or copy this message. 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If you have received this message in error, please notify the sender immediately by email, facsimile or telephone and destroy the original message. ************************************************************************************************************************** =================================== This list is hosted by DevelopMentorŪ http://www.develop.com Some .NET courses you may be interested in: NEW! Guerrilla ASP.NET, 26 Jan 2004, in Los Angeles http://www.develop.com/courses/gaspdotnetls View archives and manage your subscription(s) at http://discuss.develop.com
