int data type compatibility

9 Nov 2006 4:11 PM

Phuff

I'm hoping someone has some suggestions. I'm programming something
which interacts with Autodesk Inventor release 11 SP2. I want to for
loop through a collection and get data fro each item. Although the
collection specifies [int index] it does not seem to be compatible with
..Net's version of int.

for (inti = 0; i < var.DrawingViews.Count; i++)
{
MessageBox.Show(var.DrawingViews[i].Name);
}

This always returns an invalid parameter exception.
However, this works:

for (inti = 0; i < var.DrawingViews.Count; i++)
{
MessageBox.Show(var.DrawingViews[8].Name);
}

As you can see if you hard code the number it gets cast or converted,
COM side, to whatever data type Inventor wants. I've tried everything.
Int16-64, short-long, and all the unsigned variants. None of them
work. I am aware that I can enumerate through the collection with
foreach and it does in fact work. However, there will undoubtedly be a
point where I will want a dynamic index variable.

Any suggestions? Any type of Win32 type I should marshal in and cast
this int as?

Thanks!

9 Nov 2006 4:18 PM

Phuff

for (inti... is actually for (int i... in the code

thought I would specify before someone tried to correct that.

Phuff wrote:
Show quote

> I'm hoping someone has some suggestions. I'm programming something
> which interacts with Autodesk Inventor release 11 SP2. I want to for
> loop through a collection and get data fro each item. Although the
> collection specifies [int index] it does not seem to be compatible with
> .Net's version of int.
>
> for (inti = 0; i < var.DrawingViews.Count; i++)
> {
> MessageBox.Show(var.DrawingViews[i].Name);
> }
>
> This always returns an invalid parameter exception.
> However, this works:
>
> for (inti = 0; i < var.DrawingViews.Count; i++)
> {
> MessageBox.Show(var.DrawingViews[8].Name);
> }
>
> As you can see if you hard code the number it gets cast or converted,
> COM side, to whatever data type Inventor wants. I've tried everything.
> Int16-64, short-long, and all the unsigned variants. None of them
> work. I am aware that I can enumerate through the collection with
> foreach and it does in fact work. However, there will undoubtedly be a
> point where I will want a dynamic index variable.
>
> Any suggestions? Any type of Win32 type I should marshal in and cast
> this int as?
>
> Thanks!

9 Nov 2006 7:21 PM

Phuff

OKay, I got it figured out. Apparently Autodesk uses 1 based
collections, not 0 based. How annoying.

for (int i = 1; i <= var.DrawingViews.Count; i++)...

Phuff wrote:
Show quote

> I'm hoping someone has some suggestions. I'm programming something
> which interacts with Autodesk Inventor release 11 SP2. I want to for
> loop through a collection and get data fro each item. Although the
> collection specifies [int index] it does not seem to be compatible with
> .Net's version of int.
>
> for (inti = 0; i < var.DrawingViews.Count; i++)
> {
> MessageBox.Show(var.DrawingViews[i].Name);
> }
>
> This always returns an invalid parameter exception.
> However, this works:
>
> for (inti = 0; i < var.DrawingViews.Count; i++)
> {
> MessageBox.Show(var.DrawingViews[8].Name);
> }
>
> As you can see if you hard code the number it gets cast or converted,
> COM side, to whatever data type Inventor wants. I've tried everything.
> Int16-64, short-long, and all the unsigned variants. None of them
> work. I am aware that I can enumerate through the collection with
> foreach and it does in fact work. However, there will undoubtedly be a
> point where I will want a dynamic index variable.
>
> Any suggestions? Any type of Win32 type I should marshal in and cast
> this int as?
>
> Thanks!