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dotnet interop
group:CompiledAssembly.CreateInstance returns nothing
dotnet interop:
Eric,
[quoted text, click to view] > I have a .Net class in a dll that compiles code on the fly. Everything is > working great from all .Net applications. I'm now trying to make this class > Interopable. I don't receive any erros after calling > CompileAssemblyFromSource but when I try to create a instance of my class > (CompiledAssembly.CreateInstance(targetClassName)) I get a null value > returned. No exceptions or other errors are reported. Has anyone tried > compiling code on the fly in an Interop class? I'm starting to think maybe > it's a security issue but I thought I would have gotten an exception. This > one has caused me problems for days. Check the Errors property of the compiler object to see whether the assembly has been generated at all.
Eric,
[quoted text, click to view] > The Compiler.Errors.Count = 0. I also checked the temp diectory an a dll > is created. Is there anything else I should check? Check the class name. It should include the name space as well. Does the class have a public ctor? Rob [quoted text, click to view] >
> Thanks, > > Eric > > > "Robert Jordan" <robertj@gmx.net> wrote in message > news:dj81bi$bba$05$1@news.t-online.com... > >>Eric, >> >> >>>I have a .Net class in a dll that compiles code on the fly. Everything >>>is working great from all .Net applications. I'm now trying to make this >>>class Interopable. I don't receive any erros after calling >>>CompileAssemblyFromSource but when I try to create a instance of my class >>>(CompiledAssembly.CreateInstance(targetClassName)) I get a null value >>>returned. No exceptions or other errors are reported. Has anyone tried >>>compiling code on the fly in an Interop class? I'm starting to think >>>maybe it's a security issue but I thought I would have gotten an >>>exception. This one has caused me problems for days. >> >>Check the Errors property of the compiler object to see >>whether the assembly has been generated at all. >> >>Rob > >
Eric,
[quoted text, click to view] > The classname is prefixed with the full namepsace. This class does have a > public constructor with no parameters. This all works if I call it from > another .Net application so I'm pretty sure I'm compiling and creating the > Instance correctly. I'm just having problems when I go through interop. What do you mean with "through interop". CreateInstance is actually reflection. Rob [quoted text, click to view] >
> Thanks, > > Eric > > > > "Robert Jordan" <robertj@gmx.net> wrote in message > news:dj864n$9hk$04$1@news.t-online.com... > >>Eric, >> >> >>> The Compiler.Errors.Count = 0. I also checked the temp diectory an a >>>dll is created. Is there anything else I should check? >> >>Check the class name. It should include the name space as well. >>Does the class have a public ctor? >> >>Rob >> >> >> >>>Thanks, >>> >>>Eric >>> >>> >>>"Robert Jordan" <robertj@gmx.net> wrote in message >>>news:dj81bi$bba$05$1@news.t-online.com... >>> >>> >>>>Eric, >>>> >>>> >>>> >>>>>I have a .Net class in a dll that compiles code on the fly. Everything >>>>>is working great from all .Net applications. I'm now trying to make >>>>>this class Interopable. I don't receive any erros after calling >>>>>CompileAssemblyFromSource but when I try to create a instance of my >>>>>class (CompiledAssembly.CreateInstance(targetClassName)) I get a null >>>>>value returned. No exceptions or other errors are reported. Has anyone >>>>>tried compiling code on the fly in an Interop class? I'm starting to >>>>>think maybe it's a security issue but I thought I would have gotten an >>>>>exception. This one has caused me problems for days. >>>> >>>>Check the Errors property of the compiler object to see >>>>whether the assembly has been generated at all. >>>> >>>>Rob >>> >>>
I have a .Net class in a dll that compiles code on the fly. Everything is
working great from all .Net applications. I'm now trying to make this class Interopable. I don't receive any erros after calling CompileAssemblyFromSource but when I try to create a instance of my class (CompiledAssembly.CreateInstance(targetClassName)) I get a null value returned. No exceptions or other errors are reported. Has anyone tried compiling code on the fly in an Interop class? I'm starting to think maybe it's a security issue but I thought I would have gotten an exception. This one has caused me problems for days. Thanks, Eric
Rob,
The Compiler.Errors.Count = 0. I also checked the temp diectory an a dll is created. Is there anything else I should check? Thanks, Eric [quoted text, click to view] "Robert Jordan" <robertj@gmx.net> wrote in message news:dj81bi$bba$05$1@news.t-online.com... > Eric, > >> I have a .Net class in a dll that compiles code on the fly. Everything >> is working great from all .Net applications. I'm now trying to make this >> class Interopable. I don't receive any erros after calling >> CompileAssemblyFromSource but when I try to create a instance of my class >> (CompiledAssembly.CreateInstance(targetClassName)) I get a null value >> returned. No exceptions or other errors are reported. Has anyone tried >> compiling code on the fly in an Interop class? I'm starting to think >> maybe it's a security issue but I thought I would have gotten an >> exception. This one has caused me problems for days. > > Check the Errors property of the compiler object to see > whether the assembly has been generated at all. > > Rob
Rob,
The classname is prefixed with the full namepsace. This class does have a public constructor with no parameters. This all works if I call it from another .Net application so I'm pretty sure I'm compiling and creating the Instance correctly. I'm just having problems when I go through interop. Thanks, Eric [quoted text, click to view] "Robert Jordan" <robertj@gmx.net> wrote in message
news:dj864n$9hk$04$1@news.t-online.com... > Eric, > >> The Compiler.Errors.Count = 0. I also checked the temp diectory an a >> dll is created. Is there anything else I should check? > > Check the class name. It should include the name space as well. > Does the class have a public ctor? > > Rob > > >> >> Thanks, >> >> Eric >> >> >> "Robert Jordan" <robertj@gmx.net> wrote in message >> news:dj81bi$bba$05$1@news.t-online.com... >> >>>Eric, >>> >>> >>>>I have a .Net class in a dll that compiles code on the fly. Everything >>>>is working great from all .Net applications. I'm now trying to make >>>>this class Interopable. I don't receive any erros after calling >>>>CompileAssemblyFromSource but when I try to create a instance of my >>>>class (CompiledAssembly.CreateInstance(targetClassName)) I get a null >>>>value returned. No exceptions or other errors are reported. Has anyone >>>>tried compiling code on the fly in an Interop class? I'm starting to >>>>think maybe it's a security issue but I thought I would have gotten an >>>>exception. This one has caused me problems for days. >>> >>>Check the Errors property of the compiler object to see >>>whether the assembly has been generated at all. >>> >>>Rob >> >>
Rob,
You are right about the reflection. When I say through Interop I mean how my class is actual called. I have a .Net dll with a very simple class that is setup for interop. The simple class internal uses reflection to create a class from a string to use for some calculations and returns a result. This is where my problems comes in. The CreateInstance always returns null. Hopefully I've cleared up the confusion. Thanks, Eric [quoted text, click to view] "Robert Jordan" <robertj@gmx.net> wrote in message news:dj87ae$ih6$03$1@news.t-online.com... > Eric, > >> The classname is prefixed with the full namepsace. This class does >> have a public constructor with no parameters. This all works if I call >> it from another .Net application so I'm pretty sure I'm compiling and >> creating the Instance correctly. I'm just having problems when I go >> through interop. > > What do you mean with "through interop". CreateInstance is actually > reflection. > > Rob > > >> >> Thanks, >> >> Eric >> >> >> >> "Robert Jordan" <robertj@gmx.net> wrote in message >> news:dj864n$9hk$04$1@news.t-online.com... >> >>>Eric, >>> >>> >>>> The Compiler.Errors.Count = 0. I also checked the temp diectory an a >>>> dll is created. Is there anything else I should check? >>> >>>Check the class name. It should include the name space as well. >>>Does the class have a public ctor? >>> >>>Rob >>> >>> >>> >>>>Thanks, >>>> >>>>Eric >>>> >>>> >>>>"Robert Jordan" <robertj@gmx.net> wrote in message >>>>news:dj81bi$bba$05$1@news.t-online.com... >>>> >>>> >>>>>Eric, >>>>> >>>>> >>>>> >>>>>>I have a .Net class in a dll that compiles code on the fly. >>>>>>Everything is working great from all .Net applications. I'm now >>>>>>trying to make this class Interopable. I don't receive any erros >>>>>>after calling CompileAssemblyFromSource but when I try to create a >>>>>>instance of my class >>>>>>(CompiledAssembly.CreateInstance(targetClassName)) I get a null value >>>>>>returned. No exceptions or other errors are reported. Has anyone >>>>>>tried compiling code on the fly in an Interop class? I'm starting to >>>>>>think maybe it's a security issue but I thought I would have gotten an >>>>>>exception. This one has caused me problems for days. >>>>> >>>>>Check the Errors property of the compiler object to see >>>>>whether the assembly has been generated at all. >>>>> >>>>>Rob >>>> >>>> >>
Heres some more information. Original I had GenerateInMemory = true; when
compiling. I changed this to false so that I could look into the dll and it started to work. Does anyone know why this would work now? I would really like to get it back in memory if possible. Thanks, Eric [quoted text, click to view] "Eric" <anywhere@usa.com> wrote in message news:u2iZb4W1FHA.916@TK2MSFTNGP10.phx.gbl... >I have a .Net class in a dll that compiles code on the fly. Everything is >working great from all .Net applications. I'm now trying to make this >class Interopable. I don't receive any erros after calling >CompileAssemblyFromSource but when I try to create a instance of my class >(CompiledAssembly.CreateInstance(targetClassName)) I get a null value >returned. No exceptions or other errors are reported. Has anyone tried >compiling code on the fly in an Interop class? I'm starting to think maybe >it's a security issue but I thought I would have gotten an exception. This >one has caused me problems for days. > > Thanks, > > Eric > >
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