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If you are a beginner, I suggest you pick up a book on .Net development or C# and read.
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Hello,
I built a plugin for a parent application on an x86 OS at work, and came home to try it and it would not work. I got the error code of "0x8007000B" when trying to load the dll which lead me to find out that because dll was set to build to anycpu there is some sort of conflict.
Does anyone have any idea as to how to fix this so that it always works, no matter the CPU architecture?
Here is a picture of the error:
http://img210.imageshack.us/img210/9088/pluginerror1.jpg[^]
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There is no general solution, applicable to all applications. The fundamental rule is a process must be homogeneous, i.e. consist of all x86 or all x64 code; so e.g. you can't build a plug-in that works for both a 32-bit and a 64-bit native app (say Internet Explorer).
However, if app and plug-in are both managed code, then building for x86 should always work, as each x64 processor and Windows version (at this moment) is able to execute x86 code as well. One caveat: you need all referenced files on your machine, and that may be tricky in some situations.
Remark: Visual Studio Express doesn't let you choose, it generates "AnyCPU" (Google will yield some work-arounds though). Full Visual Studio lets you choose, unfortunately the default is "AnyCPU", which may cause your app to start as a 64-bit process, to later discover some needed native file isn't available for 64-bit (warning: on Win64, 64-bit system code resides in system32, and 32-bit code in systemWow64!).
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Hi Luc,
Thanks for the reply.
With some further troubleshooting, I have discovered something interesting. I thought the problem was the plugin dll I had written, but it turns out it was actually a resource dll that was inside of my projects plugin dll. So the hierarchy is this:
Parent Application (exe)
-->My PlugIn dll (c sharp)
---->Resource dll (delphi)
I do not have any control over either the Parent Applications code or the resource dll. It looks as if when the Parent application and the plugin I wrote are ran as a 64bit application (on a 64bit OS) the resource dll will not load. Does this sound like a reasonable diagnosis? If so, is there a work around for this situation?
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The main code decides on the word size of the process (either directly by being built for 32 or 64bit, or by looking at the OS when managed and "AnyCPU"); everything else must comply to the top-level code.
Hence, if resource.dll is 32-bit, it all must be 32-bit; there is no way around that.
if parent is managed and built for "AnyCPU", there are hacks to modify it and effectively become built for "x86" (the difference is a single bit in the exe's header!); you need "corflag" or similar, see e.g. http://stackoverflow.com/questions/1507268/force-x86-clr-on-any-cpu-net-assembly[^]
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Thank you.
I will work with that tomorrow and try and get it working.
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Hi Luc,
I ran corflags against my resource.dll and I got the following message
"corflags : error CF008 : The specified file does not have a valid managed header"
I know it was compiled in Delphi, but having no experience with Delphi and having not encountered this type of conflict before, I'm pretty confused on how to proceed?
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no surprise here. Now re-read what I wrote earlier.
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 Ok, I see where you were going with it now.
Here are the results from the parent exe file
Version : v2.0.50727
CLR Header: 2.5
PE : PE32
CorFlags : 1
ILONLY : 1
32BIT : 0
Signed : 0
I forced it to 32bit and tried to start it, 8 other dependencies are failing, probably because they have the 32bit flag set to 0 so I shall scrap this idea unless there is a way to do something similiar on the unmanaged resource.dll . 
Thank you for your help.
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No, there is not. Unmanaged means native code, and that is entirely different for 32/64 bits.
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hi..
am new to c#..
am getting an error below code..wch is wrking fine with Vb..
int legseq = 0;
if (legseq == " ")
{
legseq = 0;
}
Error: Operator '==' cannot be applied to operands of type 'string' and 'int'
I dont want to use 'null'instaed off " ". and dont want to make int as nullable. can anybdy help?
Regrds,
Reta
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In C#, as in many other languages, " " is a string holding a single space.
You can't store text in an integer, all it can hold is a number in a particular range (and 0 is always a good number).
bigphish wrote: I dont want to use 'null'instaed off " ". and dont want to make int as nullable. can anybdy help?
Maybe you should start by telling what you do want. Or just make it happen.
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Thnks for the reply Luc.
will the below code can give the same result?
int? legseq = 0;
if (legseq == null)
{
legseq = 0;
}
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that would compile, however it too does not make sense to me. the variable starts by holding zero, so why compare it to " " in the original code (something it can't hold), or to null here (something it could but won't hold).
start by telling what you do want (in functional terms, not in bad code), before you attempt to code it.
BTW: the best way (quality wise and speed wise) to learn a new programming language (or programming in general), is by choosing, buying, and studying a book on the subject. And I do mean a real book, not an e-book or a web course.
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You have introduced a redundant piece of code there. If you leave the type is int rather than nullable int, unless you explicitly assign it a value, it will already be zero. The default value for int is 0.
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Using null wouldn't turn it into meaningful code either, but at least it would compile. With the warning "The result of the expression is always 'false' since a value of type 'int' is never equal to 'null' of type 'int?'"
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Yes, I'm sure. You changed the type of test as well as its initialization. Of course it's going to be different.
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I guess I could have been clearer..
And I'm still wondering what he actually wants to do.
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He absolutely positively undeniably wants to make sure legseq is zero, I'd say.
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harold aptroot wrote: And I'm still wondering what he actually wants to do.
He is creating a security firewall to prevent external hacking that would make his int a string ?
"It is the mark of an educated mind to be able to entertain a thought without accepting it." Aristotle
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What you are doing here is comparing a string " " to an integer.
This is not acceptable in C#.
You can compare legseq to 0 or convert legseq to string.
The default value of an int is 0 so if you dont assign anything to legseq, its value will be 0.
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bigphish wrote: wch is wrking fine with Vb..
Which shows VB is absolute rubbish. You cannot compare apples with oranges.
You need to convert one of the two to the other type. (depending on what you want).
you could check out int.TryParse or the ToString method or the Convert classes. Each has it's own advantages.
oh and please. Loose the text speech and check your post for spelling before submitting. It's nicer for us the read 
V.
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Okie.. sorry if my code was unclear..
I am converting some code from vb to c#, wch will take some values from Oracle database and will insert in to a MS access database..so I cant view the oracle database wch is in some other server.legseq field in oracle database is taking data dynamically , which can be empty also some times.
so while inserting in to Access database I need to check if the value of legseq is empty.if it is empty i need to make it Zero before inserting.
hope its clear now..
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