selectionset in .net

I am using .net in autocad2005 and i need some code examples.

Dim FilterType(0) As Integer
Dim FilterData(0) As Object
FilterType(0) = 0
FilterData(0) = "Circle"
Dim ss As AutoCAD.AcadSelectionSet
Try
ss = m_AcadApp.ActiveDocument.SelectionSets.Add("yyy")
Catch ex As Exception
ss = m_AcadApp.ActiveDocument.SelectionSets.Item("yyy")
End Try
ss.Select(AcSelect.acSelectionSetAll, , , FilterType, FilterData)

the Exception is on the select methode

the Exception details:


An unhandled exception of type 'System.ArgumentException' occurred in VbDotNetisaac.exe
Additional information: Invalid argument FilterType in Select

How I use the FilterType and the FilterData objects?
thanks

 

FilterData should always be dimmed as Variant.
In your example, "Circle" is not an object but a string. It
doesn't though, you still have to dim your FilterData as Variant.

Arnaud

 

There is no Variant data type in .NET.

 

Your subscripting is off. The zeros in your Dim statements should be
ones. An easy way to avoid subscripting errors like this is to populate
the array while declaring it:

Dim FilterType As Integer[] = {0};
Dim FilterData As Object[] = {"CIRCLE"};

 

Hi Frank,
Does that mean arrays are 1 based in .net?
I thought the integer type had to be called something else in .net???

 

No. The number used to declare the size of an array is the number of
elements in the array, not their ordinals.

You're right. In .NET we have to use System.Int16 while Integer is
System.Int32. Use Short instead:

Dim FilterType As Short[] = {0};

 

sorry to contradict, within vb.net there is no 'Variant' available, 'Object' is ok, what i see in your code is that between vb6 and vb.net the
datatype 'Integer' is different (16bit <<>> 32bit). so use:

Dim FilterType(0) as Int16

- alfred -

 

so why is it not
Dim FilterType As Short[1] = {0};

I guess assigning the array automatically sizes it?

so for a 3 element array would it be?
Dim FilterType As Short[] = {0,0,0};

 

That is correct.

Yep. Or if you prefer:

Dim FilterType[] as New Short[3]
FilterType[0] = 1
FilterType[1] = 2
FilterType[2] = 3

 

Your subscripting is off. The zeros in your Dim statements should be ones.

Please choose a single language per example (or at least per line of code) to avoid confusing others and yourself.

 

Your comments are both rude and unhelpful. If there is an error in what
I posted, please correct it. Preferably without condescension.

 

What fantum noted without actually explaining is that the square
brackets I used should be parens.

Sorry about that. I very rarely use VB.NET.

 

My apologies. You might also note that, for VB, the semicolon is a syntax error and that your statements regarding the numbers used in array declaration, while correct for C#, are incorrect for VB (unless you happen to be using quite an old beta).

 

I overlooked the semicolon too. As for arrays in VB.NET, I just tried it
out and you're right.

'Dim x(n) As y' creates an array of n + 1 elements while C# creates an
array of n elements. Thanks for the heads up.

 

Certainly. And again, sorry for my earlier tone. I can only plead a short temper due a very long week.

 

frank
THANK'S