I've made a simple C# DLL (that's part of a much larger project) using VS2005. I need to use the DLL in Excel via VBA code so I am using COM Interop on the assembly. I am trying to make the build process automatically generate the necessary TLB file so that I don't need to go to the command line and use regasm after every build.
My problem is that although the DLL compiles and builds fine, it does not generate a TLB file. Instead, the error in the title prints out in the output box.
I've gotten other DLLs to build TLB files by going to the project's properties in VS2005 -> Build -> Output -> Check "Register for COM interop". Also I have [assembly: ComVisible(true)] in the AssemblyInfo.cs.
Here's the summary of the source for the problem DLL and the DLL that it references for a return type:
using System;
using System.IO;
using System.Runtime.InteropServices;
using SymbolTable;
namespace ProblemLibrary
{
public class Foo
{
public Foo(string filename)
{
...
}
// method to read a text file into a SymbolTable
public SymbolTable BuildDataSet(string[] selected)
{
...
}
}
}
Here is a summary of SymbolTable.dll. It holds a return type that ProblemLibrary uses.
using System;
using System.Collections.Generic;
namespace SymbolTable
{
public class SymbolTable
{
readonly Dictionary<SymbolInfoStub, string> _symbols = new Dictionary<SymbolInfoStub, string>();
/*methods that interact with Dictionary snipped*/
}
}
Make sure the you have GuidAttribute in the assembly level.
[Guid("<PUT-GUID-HERE-1>")]
[ComVisible(true)]
interface IFoo
{
void DoFoo();
}
[Guid("<PUT-GUID-HERE-2>")]
[ComVisible(true)]
[ProgId("ProgId.Foo")]
class Foo : IFoo
{
public void DoFoo()
{
}
}