.NET Question: Problem with databinding in own custom generic objects.

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Hi All,

 

I've run into a problem and I thought I'd throw it open to some people more clever than I!

 

Basically I have created my own 'ConfigKeys' object that under the hood uses a Generic List(of ConfigKey) to do the datastore.

I have a vb.net UI, with a datagridview that uses my object as a datasource.

 

My problem is that if I add a new ConfigKey to the ConfigKeys list using my object model, the datagridview doesn't show the newly added item, even if I call datagridview.refresh.

 

Here's some pseudo VB.net code:

 

private function doAdd()

***oUser.ConfigKeys.add(new ConfigKey("name","value")

***datagridView1.refresh()

end function

 

The wierd thing is that if I put a breakpoint on the line after the refresh() and query the oUserConfig keys count, it's correct, but the datagridgridview.rows count is 1 less.

The only way I've gotten the grid to update is to disconnect the datasource and reconnect it...

 

private function doAdd()

***oUser.ConfigKeys.add(new ConfigKey("test","key", "etc")

***datagridView1.datasource = nothing

***datagridView1.datasource = oUser.ConfigKeys()

end function

 

The grid is still definately connected to the datasource - if I change one of the config keys through the configKeys model, then the grid will show the changes.

I'm guessing there's something I need to do in my object model to tell any databound items that the size of the items has changed??

 

Any ideas? It's been a while since I've worked on something like this.

 

Thanks in anticipation.

Richard.

 

 

 

 

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