TList parent/child databinding

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Latest post 01-31-2007 3:22 PM by bgjohnso. 4 replies.

01-29-2007 12:54 PM

RCouchman
Joined on 02-15-2006
Posts 5
Points 175

TList parent/child databinding

Binding a TList<Orders> that contains OrderDetails to a pair of parent/child DataGridViews isn't working for me. The parent is ok, but the child grid displays the correct number of rows with the values in the cells all null. If I use List<> rather than TList<>, the cell values display ok.

I've attached a small project that shows the problem. I created a couple DataSources for the grids from Orders and OrderDetails, create a few instances of Orders with OrderDetails manually, put them in a TList/List, and attached the lists to the binding sources. If someone could take a look and offer suggestions I'd really appreciate it.

Thanks, Richard

Filed under: DataBinding

Post Points: 65

01-29-2007 12:57 PM In reply to

Robert Hinojosa
Joined on 04-05-2004
Fort Worth, TX
Posts 2,797
Points 71,090

Re: TList parent/child databinding

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Thanks Richard, we'll take a look at your sample project and get back with you.

Robert Hinojosa
-------------------------------------
Member of the Codesmith Tools, .netTiers, teams
http://www.nettiers.com
-------------------------------------

Post Points: 5

01-29-2007 2:38 PM In reply to

bgjohnso
Joined on 09-15-2005
Spokane, WA
Posts 764
Points 22,530

RE: TList parent/child databinding

Contact

Richard,

This has definitely been an issue in the past, as indicated by these couple of threads:

http://community.codesmithtools.com/forums/permalink/15956/15956/ShowThread.aspx#15956

http://community.codesmithtools.com/forums/permalink/19277/19277/ShowThread.aspx#19277

Both threads have proposed solutions. While each solution is different, they both appear to work. The simplest is proposed by GRAW, and just requires a simple modification to EntityHelper.GetBindableProperties:

public static PropertyDescriptorCollection GetBindableProperties(Type type)

{

// create a filter so we only return the properties that have been designated as bindable

Attribute[] attrs = new Attribute[] { new System.ComponentModel.BindableAttribute(true) };

if (type.IsGenericType)

{

type = type.GetGenericArguments()[0];

}

// save the bindable properties in a local field

return TypeDescriptor.GetProperties(type, attrs);

}

Give this a shot and see if it fixes your problem until we get the fix in place.

b e n j o h n s o n

Ben Johnson
------------------------------
Member of the .NetTiers team
Visit http://www.nettiers.com
------------------------------

Post Points: 35

01-30-2007 7:27 AM In reply to

RCouchman
Joined on 02-15-2006
Posts 5
Points 175

Re: RE: TList parent/child databinding

Contact

Answer

That fixed it.

Ben, Robert, everyone else - thanks.

Post Points: 35

01-31-2007 3:22 PM In reply to

bgjohnso
Joined on 09-15-2005
Spokane, WA
Posts 764
Points 22,530

Re: RE: TList parent/child databinding

Contact

This has been added in SVN 471.

Ben Johnson
------------------------------
Member of the .NetTiers team
Visit http://www.nettiers.com
------------------------------

Post Points: 5

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