Passing Parameter

I've to create an instance reference to my custom assembly by constructor
method.
It works well with a Code into the report .rdl like this:
---
<Code>
Public Obj As MyClass
Protected Overrides Sub OnInit()
dim MyArg as String = 4
Obj = new MyClass(MyArg)
End Sub
</Code>
--
But i need to pass a real parameter so:
Obj = new MyClass(Parameters!MyPar.Value)
it don't work and break with the error
BC30469 "The reference to a member not shared needs a reference to an object"
(I translate this from the italian version.... sorry for my bad english!!!
How can i do'
Thanks a lot.Try using this reference.
Report.Parameters!MyPar.Value
that should work in the Code.section
--
Wayne Snyder, MCDBA, SQL Server MVP
Mariner, Charlotte, NC
www.mariner-usa.com
(Please respond only to the newsgroups.)
I support the Professional Association of SQL Server (PASS) and it's
community of SQL Server professionals.
www.sqlpass.org
"Riccardo" <Riccardo@.discussions.microsoft.com> wrote in message
news:A86E7571-051B-4185-A6EF-110FAFBD67DD@.microsoft.com...
> I've to create an instance reference to my custom assembly by constructor
> method.
> It works well with a Code into the report .rdl like this:
> ---
> <Code>
> Public Obj As MyClass
> Protected Overrides Sub OnInit()
> dim MyArg as String = 4
> Obj = new MyClass(MyArg)
> End Sub
> </Code>
> --
> But i need to pass a real parameter so:
> Obj = new MyClass(Parameters!MyPar.Value)
> it don't work and break with the error
> BC30469 "The reference to a member not shared needs a reference to an
> object"
> (I translate this from the italian version.... sorry for my bad
> english!!!
> How can i do'
> Thanks a lot.|||This not works, but the error is changed with a message box:
" Unable to load the assembly expressions. The expression refers to a
nonexistent parameter in the parameters's collection.".
This is not true, becouse the parameter exists.
Can you help me again?
"Wayne Snyder" wrote:
> Try using this reference.
> Report.Parameters!MyPar.Value
> that should work in the Code.section
> --
> Wayne Snyder, MCDBA, SQL Server MVP
> Mariner, Charlotte, NC
> www.mariner-usa.com
> (Please respond only to the newsgroups.)
> I support the Professional Association of SQL Server (PASS) and it's
> community of SQL Server professionals.
> www.sqlpass.org
> "Riccardo" <Riccardo@.discussions.microsoft.com> wrote in message
> news:A86E7571-051B-4185-A6EF-110FAFBD67DD@.microsoft.com...
> > I've to create an instance reference to my custom assembly by constructor
> > method.
> > It works well with a Code into the report .rdl like this:
> > ---
> > <Code>
> > Public Obj As MyClass
> > Protected Overrides Sub OnInit()
> > dim MyArg as String = 4
> > Obj = new MyClass(MyArg)
> > End Sub
> > </Code>
> > --
> > But i need to pass a real parameter so:
> > Obj = new MyClass(Parameters!MyPar.Value)
> > it don't work and break with the error
> > BC30469 "The reference to a member not shared needs a reference to an
> > object"
> > (I translate this from the italian version.... sorry for my bad
> > english!!!
> > How can i do'
> > Thanks a lot.
>
>

Passing by reference an ADO Connection from Excel VBA to C++

I want to pass by reference an ADO Connection which has been already opened in Excel VBA to a C++ DLL, but I get the following error:

"Unhandled exception at 0x4dd5230f in EXCEL.EXE: 0xC0000005: Access violation writing location 0x1775238d."

What am I doing wrong?

The code I am using is:

- VBA:

Declare Function Retrieve_C Lib "xxx.dll" (ByRef conn As ADODB.Connection) As Double
Function Test() As Double
Dim c As ADODB.Connection
Set c = New ADODB.Connection
c.Open "Provider=MSDASQL; Data Source=xxx"
Test = Retrieve_C(c)
End Function

- C++:

#import "xxx\msado15.dll" rename("EOF","ADOEOF")
double __stdcall Retrieve_C(ADODB::_ConnectionPtr conn)
{
CoInitialize(NULL);
ADODB::_RecordsetPtr recordset(__uuidof(ADODB::Recordset));
recordset->Open("SELECT xxx",
conn.GetInterfacePtr(),
ADODB::adOpenForwardOnly,
ADODB::adLockReadOnly,
ADODB::adCmdText);
return recordset->Fields->GetItem("xxx")->GetValue();
recordset->Close();
}

I have moved this thread to the native data access forum. You are more likely to get a response there, since this is native ADO and not ADO.NET.

http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=87&SiteID=1

Thanks,

Sarah

|||

Try using "xxx.dll" (ByVal conn As ADODB.Connection) instead.

(Passing conn ByVal instead of ByRef)

Also as a side note, you've placed call to recordset close method after the return statement...

---

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