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NDO Tutorial Sample in VB

12/3/2006 12:04:50 PM

didikunz

9 posts

www.mediasupport.ch

NDO Tutorial Sample in VB
Modified By Mirko on 12/5/2006 11:53:30 AM)

Hello Mirko,

in the help there is an example to query a Picture object fro a PictuteHeader mapped to the same table. It is in C#:

PersistenceManager pm = new PersistenceManager();
Query q = pm.NewQuery(typeof(PictureHeader), null);
IList l = q.Execute();
// Normally we'd show the headers in an UI
foreach (PictureHeader ph in l)
Console.WriteLine(ph.Name);

// Select a PictureHeader and find the corresponding Picture
Picture p = (Picture) pm.FindObject(typeof(Picture), ((PictureHeader)l[0]).NDOObjectId.Id.Value);
Image image = p.Image;
Console.WriteLine("Picture: " + p.Name + ": " + image.Height.ToString() + "x" + image.Width.ToString());

If I translate it to VB.NET using ASPAlliance.com translator it looks like this:

Dim pm As New PersistenceManager()
Dim q As Query = pm.NewQuery(GetType(PictureHeader), Nothing)
Dim l As IList = q.Execute()
' Normally we'd show the headers in an UI
Dim ph As PictureHeader
For Each ph In l
Console.WriteLine(ph.Name)
Next ph
' Select a PictureHeader and find the corresponding Picture
Dim p As Picture = CType(pm.FindObject(GetType(Picture), CType(l(0), PictureHeader).NDOObjectId.Id.Value), Picture)
Dim image As Image = p.Image
Console.WriteLine(("Picture: " + p.Name + ": " + image.Height.ToString() + "x" + image.Width.ToString()))

If I do something similar with my own objects (also mapped to the same table) it says: 'NDOObjectId is not part of Object soandso.' Is the VB.NET syntax correct? Must I do something with my object or the mapping? Or is it simply not possible in VB.NET 2005?

Regards: Didi

12/4/2006 8:01:38 AM

didikunz

9 posts

www.mediasupport.ch

Re: Inheritance without Polymorphy in VB

...I found out, that it works, if I set the reference in my callig project to the dll instead of the project. But what I did not found out is, how can I make Visual Studio to update the referenced dll each time I regenerate (probably I just need to search the VS docs). Regards: Didi

12/5/2006 10:51:18 AM

Mirko

109 posts