Hi,
I am trying to expose my .NET 2.0 class as a COM type using the following
attributes for the attributes
[ClassInterface( ClassInterfaceT ype.None)]
[Guid("8D0240AD-1BBE-4831-8214-39DD46A4A797")]
I have the "Register for COM Interop" build property set to true. I also
have two functions in the class to register and unregister the COM with the
registry. But when i try to build it in VS.NET 2005, i get the following
error "XXX.dll does not contain any types that can be registered for COM
Interop" and "XXX.dll does not contain any types that can be Unregistered for
COM Interop". The same code works perfectly in VS.NET 2003. Anybody know of
any reasons why this is happeneing or what i am doing wrong?
Thank You,
Vish
Nov 17 '05
26  10679 
Yeah I know it's always been default because it's bitten me in the
rear-end a few times ;-). I honestly didn't think that they would have
made a breaking change like that. So the question that still remains,
did setting [ComVisible(true )] really solve the problem or was it
something else?
Jason Newell
Willy Denoyette [MVP] wrote: "Jason Newell" <no****@nospam. com> wrote in message
news:Oe******** ******@TK2MSFTN GP15.phx.gbl...
Vish,
Willy is correct per documentation:
http://msdn2.microsoft.com/en-us/lib...US,VS.80).aspx.
I'd be interested to know why explicitly settings [ComVisible(true )] fixed
the problem. Unfortunately, I don't have 2.0 or I'd test it myself.
Jason Newell
And not only per documentation ;-), it was the default since version 1.0 and
did not change in v2.0 (that would be a breaking change).
I tested this with v2.0 and I can confirm 'true' is still the default.
Willy.
"Jason Newell" <no****@nospam. com> wrote in message
news:eC******** ******@TK2MSFTN GP11.phx.gbl... Yeah I know it's always been default because it's bitten me in the
rear-end a few times ;-). I honestly didn't think that they would have
made a breaking change like that. So the question that still remains, did
setting [ComVisible(true )] really solve the problem or was it something
else?
Jason Newell
Pretty sure it was something else (my guess: missing public on the class).
Willy.
Hi,
Ok. I am not sure why but it did fix the issue. Obviously y'all know more on
this subject than i do. But i am posting my code below if y'all are still
interested.
[ClassInterface( ClassInterfaceT ype.None)]
[Guid("8D0240AD-1BBE-4831-8214-39DD46A4A797")]
[ComVisible(true )]
public sealed class TestTool : BaseCommand
{
private IApplication m_app;
public override void OnCreate(object hook)
{
if (hook != null)
{
if (hook is IMxApplication)
{
m_app = (IApplication)h ook;
}
}
}
public override void OnClick()
{
IMxDocument mxDoc = (IMxDocument)m_ app.Document;
IActiveView activeView = mxDoc.ActiveVie w;
activeView.Exte nt = activeView.Full Extent;
activeView.Refr esh();
}
public TestTool()
{
base.m_category = "Vish's Test";
base.m_caption = "Full Extent C#";
base.m_message = "Zooms the display to its full extent";
base.m_toolTip = "Full Extent C#";
base.m_name = "Developer Samples_FullExt ent C#";
string[] res = GetType().Assem bly.GetManifest ResourceNames() ;
if (res.GetLength( 0) > 0)
{
base.m_bitmap = new
System.Drawing. Bitmap(GetType( ).Assembly.GetM anifestResource Stream(res[0]));
}
}
#region Component Category Registration
[ComRegisterFunc tion()]
[ComVisible(fals e)]
static void RegisterFunctio n(String regKey)
{
MxCommands.Regi ster(regKey);
}
[ComUnregisterFu nction()]
[ComVisible(fals e)]
static void UnregisterFunct ion(String regKey)
{
MxCommands.Unre gister(regKey);
}
#endregion
}
"Willy Denoyette [MVP]" wrote:
"Jason Newell" <no****@nospam. com> wrote in message
news:eC******** ******@TK2MSFTN GP11.phx.gbl... Yeah I know it's always been default because it's bitten me in the
rear-end a few times ;-). I honestly didn't think that they would have
made a breaking change like that. So the question that still remains, did
setting [ComVisible(true )] really solve the problem or was it something
else?
Jason Newell
Pretty sure it was something else (my guess: missing public on the class).
Willy.
Sorry, but this is not a complete sample (missing BaseCommand), so there is
lttle I can do with it, but trust me [ComVisible(true )] IS the default.
I'm also not entirely clear on the purpose is of this class for a COM
client, true, this object creatable from COM clients, but none of it's
methods are callable.
Willy.
"Vish" <Vi**@discussio ns.microsoft.co m> wrote in message
news:EB******** *************** ***********@mic rosoft.com... Hi,
Ok. I am not sure why but it did fix the issue. Obviously y'all know more
on
this subject than i do. But i am posting my code below if y'all are still
interested.
[ClassInterface( ClassInterfaceT ype.None)]
[Guid("8D0240AD-1BBE-4831-8214-39DD46A4A797")]
[ComVisible(true )]
public sealed class TestTool : BaseCommand
{
private IApplication m_app;
public override void OnCreate(object hook)
{
if (hook != null)
{
if (hook is IMxApplication)
{
m_app = (IApplication)h ook;
}
}
}
public override void OnClick()
{
IMxDocument mxDoc = (IMxDocument)m_ app.Document;
IActiveView activeView = mxDoc.ActiveVie w;
activeView.Exte nt = activeView.Full Extent;
activeView.Refr esh();
}
public TestTool()
{
base.m_category = "Vish's Test";
base.m_caption = "Full Extent C#";
base.m_message = "Zooms the display to its full extent";
base.m_toolTip = "Full Extent C#";
base.m_name = "Developer Samples_FullExt ent C#";
string[] res = GetType().Assem bly.GetManifest ResourceNames() ;
if (res.GetLength( 0) > 0)
{
base.m_bitmap = new
System.Drawing. Bitmap(GetType( ).Assembly.GetM anifestResource Stream(res[0]));
}
}
#region Component Category Registration
[ComRegisterFunc tion()]
[ComVisible(fals e)]
static void RegisterFunctio n(String regKey)
{
MxCommands.Regi ster(regKey);
}
[ComUnregisterFu nction()]
[ComVisible(fals e)]
static void UnregisterFunct ion(String regKey)
{
MxCommands.Unre gister(regKey);
}
#endregion
}
"Willy Denoyette [MVP]" wrote:
"Jason Newell" <no****@nospam. com> wrote in message
news:eC******** ******@TK2MSFTN GP11.phx.gbl... > Yeah I know it's always been default because it's bitten me in the
> rear-end a few times ;-). I honestly didn't think that they would have
> made a breaking change like that. So the question that still remains,
> did
> setting [ComVisible(true )] really solve the problem or was it something
> else?
>
>
> Jason Newell
>
>
Pretty sure it was something else (my guess: missing public on the
class).
Willy.
Hi Willy,
I wrote this class as an added tool for ESRI's ArcMap Software. The
BaseCommand class is part of their ArcObjects pacakage. So i will not be
provide you with that class. Anyway the the functions of the class below was
called and successfully executed from ArcMap which is completely built on
COM. Anyway that is not to say that you are write about what you are saying.
I just maybe it will help m eunderstand whats happeneing better. I class
below successfully created a new toolbar button and executed on click. Please
let me know what you think.
-Vish
"Willy Denoyette [MVP]" wrote: Sorry, but this is not a complete sample (missing BaseCommand), so there is
lttle I can do with it, but trust me [ComVisible(true )] IS the default.
I'm also not entirely clear on the purpose is of this class for a COM
client, true, this object creatable from COM clients, but none of it's
methods are callable.
Willy.
"Vish" <Vi**@discussio ns.microsoft.co m> wrote in message
news:EB******** *************** ***********@mic rosoft.com... Hi,
Ok. I am not sure why but it did fix the issue. Obviously y'all know more
on
this subject than i do. But i am posting my code below if y'all are still
interested.
[ClassInterface( ClassInterfaceT ype.None)]
[Guid("8D0240AD-1BBE-4831-8214-39DD46A4A797")]
[ComVisible(true )]
public sealed class TestTool : BaseCommand
{
private IApplication m_app;
public override void OnCreate(object hook)
{
if (hook != null)
{
if (hook is IMxApplication)
{
m_app = (IApplication)h ook;
}
}
}
public override void OnClick()
{
IMxDocument mxDoc = (IMxDocument)m_ app.Document;
IActiveView activeView = mxDoc.ActiveVie w;
activeView.Exte nt = activeView.Full Extent;
activeView.Refr esh();
}
public TestTool()
{
base.m_category = "Vish's Test";
base.m_caption = "Full Extent C#";
base.m_message = "Zooms the display to its full extent";
base.m_toolTip = "Full Extent C#";
base.m_name = "Developer Samples_FullExt ent C#";
string[] res = GetType().Assem bly.GetManifest ResourceNames() ;
if (res.GetLength( 0) > 0)
{
base.m_bitmap = new
System.Drawing. Bitmap(GetType( ).Assembly.GetM anifestResource Stream(res[0]));
}
}
#region Component Category Registration
[ComRegisterFunc tion()]
[ComVisible(fals e)]
static void RegisterFunctio n(String regKey)
{
MxCommands.Regi ster(regKey);
}
[ComUnregisterFu nction()]
[ComVisible(fals e)]
static void UnregisterFunct ion(String regKey)
{
MxCommands.Unre gister(regKey);
}
#endregion
}
"Willy Denoyette [MVP]" wrote:
"Jason Newell" <no****@nospam. com> wrote in message
news:eC******** ******@TK2MSFTN GP11.phx.gbl...
> Yeah I know it's always been default because it's bitten me in the
> rear-end a few times ;-). I honestly didn't think that they would have
> made a breaking change like that. So the question that still remains,
> did
> setting [ComVisible(true )] really solve the problem or was it something
> else?
>
>
> Jason Newell
>
>
Pretty sure it was something else (my guess: missing public on the
class).
Willy.
Hi,
I have the same problem. If I put [ComVisible(true )] on my class and
methods, it compiles, but I can't use the methods.
As an experiment I created a default Class Library, checked the
"Register for COM interop" -button, and I got the same error message:
"Com_test.d ll" does not contain any types that can be registered for
COM Interop.
/Erik
"Erik" <er************ *@bredband.net> wrote in message
news:11******** *************@f 14g2000cwb.goog legroups.com... Hi,
I have the same problem. If I put [ComVisible(true )] on my class and
methods, it compiles, but I can't use the methods.
As an experiment I created a default Class Library, checked the
"Register for COM interop" -button, and I got the same error message:
"Com_test.d ll" does not contain any types that can be registered for
COM Interop.
/Erik
Please post your class. Note that this has nothing to do with the ComVisible
attribute (which is definately true by default).
Willy.
In my experiment i created an empty class library, resulting in the
following code.
using System;
using System.Collecti ons.Generic;
using System.Text;
namespace Com_test
{
public class Class1
{
}
}
Shouldn't it compile without an error, even with "Register for COM
interop" checked?
"Erik" <er************ *@bredband.net> wrote in message
news:11******** *************@g 47g2000cwa.goog legroups.com... In my experiment i created an empty class library, resulting in the
following code.
using System;
using System.Collecti ons.Generic;
using System.Text;
namespace Com_test
{
public class Class1
{
}
}
Shouldn't it compile without an error, even with "Register for COM
interop" checked?
This class will compile but cannot be registered for COM interop as it
doesn't have an explicit public empty constructor .
this ...
public class Class1
{
public Class1(){}
}
will do.
Willy.
Hi Willy,
Since the class i had created did have a constructor explicitly defined, why
do you think i wasn't able to compile my class in 2.0
Thank You,
Vish
"Willy Denoyette [MVP]" wrote:
"Erik" <er************ *@bredband.net> wrote in message
news:11******** *************@g 47g2000cwa.goog legroups.com... In my experiment i created an empty class library, resulting in the
following code.
using System;
using System.Collecti ons.Generic;
using System.Text;
namespace Com_test
{
public class Class1
{
}
}
Shouldn't it compile without an error, even with "Register for COM
interop" checked?
This class will compile but cannot be registered for COM interop as it
doesn't have an explicit public empty constructor .
this ...
public class Class1
{
public Class1(){}
}
will do.
Willy.
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