DotNetCoCreateObject issues

[zaknixon]

All,

I am trying to call my .NET dll from InstallScript. For instance, I am doing the following :

prototype void callLogger(); 


function void callLogger()
       string simpleMessage,dllPath,className;
       object myDLLObj; 
       
       
  begin
     dllPath = SUPPORTDIR ^ "MyCompany.Logging.dll";
      
     MessageBox("Path to DLL: " + dllPath,INFORMATION); 
     className = "Com.Logging.Log";
     
     try 
       set myDLLObj = DotNetCoCreateObject(dllPath,className,"");  
      catch               
        
      	MessageBox(Err.Number , SEVERE);                              
       //MessageBox("It finally worked....",INFORMATION);  
      endcatch;
  	 // myDLLObj.log();
  end;    

I call this method from the OnBegin() callback method from InstallShield.

I run the installer, look at the support directory and my DLL is there. The dllPath is correct, but when the DotNetCoCreateObject is called I get an error code : -2147219705 . Does anyone know what the issue could be?

My dll has its assembly info set as ComVisible(true) as well.

Any help would be great.

Zak

[Max_wong]

You should add "UseDLL(dllPath);" before your "try" statement,

And "UnUseDLL(dllPath);" after "endcatch;".

[nlamka]

I have the same issue. My sample/test code is very simple

nResult = UseDLL(SUPPORTDIR^"TastingMasterGacUtil.dll");
if (0 = nResult)
then
try
set GacUtil = DotNetCoCreateObject( SUPPORTDIR^"TastingMasterGacUtil.dll", "TastingMasterGacUtil.GacUtil", "");
GacUtil.Add("Test");
catch
MessageBox(Err.Number, SEVERE);
GacUtil = NULL;
endcatch;
UnUseDLL( SUPPORTDIR^"TastingMasterGacUtil.dll");
endif;

What I get is the same -2147219705 error code on return.

Anyone know how this really works?

Neil

[jharveyjr]

nlamka wrote:
I have the same issue. My sample/test code is very simple

nResult = UseDLL(SUPPORTDIR^"TastingMasterGacUtil.dll");
if (0 = nResult)
then
try
set GacUtil = DotNetCoCreateObject( SUPPORTDIR^"TastingMasterGacUtil.dll", "TastingMasterGacUtil.GacUtil", "");
GacUtil.Add("Test");
catch
MessageBox(Err.Number, SEVERE);
GacUtil = NULL;
endcatch;
UnUseDLL( SUPPORTDIR^"TastingMasterGacUtil.dll");
endif;

What I get is the same -2147219705 error code on return.

Anyone know how this really works?

Neil

Try using variables in the call to DotNetCoCreateObject. I had string constants in there (like "junk.dll") and was getting a vague error. I changed to just using variables like the top example in this thread and it worked.

Also, for IS 2008 (maybe 12 too) you don't need UseDLL. As for the issue on top, I don't know. I would just verify your names. My DLL name only has a single "." in it, not two. Maybe try and rename your DLL and see if that helps.

[manomatt]

My sample code looks like this and it worked:

begin
//Get the path to the MSI SUPPORTDIR
MsiGetProperty(hMSI, "SUPPORTDIR", szMSISUPPORTDIR, nResult);
szPathCompletDll = szMSISUPPORTDIR ^ "SampleShowDll.dll";

// Load the .dll file into memory.
set GacObject = DotNetCoCreateObject( szPathCompletDll, "SampleShowDll.Class1", "");

try
GacObject.showMessage();
catch
SprintfBox (INFORMATION, "Error","Error occured: %i\n\n%s\n\n%s",
Err.Number, Err.Description, Err.LastDllError);
endcatch;

end;

what is the version of IS that u are using ???