DevForce Community Forum : Binding Objects http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2009 : Binding Objects Tue, 28 Apr 2026 04:50:07 -700 Fri, 03 Apr 2009 07:14:57 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=986 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Binding Objects : Thanks for the response. The S... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4258#4258 Author: pucsoftware
Subject: 986
Posted: 03-Apr-2009 at 7:14am

Thanks for the response. The System.Collections.ObjectModel.ObservableCollection is new to me so I'll check it out. But, I am doing WinForms. You mentioned if I "want to take advanatage of the DevForce BindingManagers". I have in a couple of instances (using the DevExpress Lookup Grid control) not used the BindingManager and everything seemed to work fine. Is the DevForce BindingManager purely optional? Are there any disadvantages/pitfalls when not using the BindingManager?
 
Again, thanks for you input.
 
Darren 
]]> Fri, 03 Apr 2009 07:14:57 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4258#4258 Binding Objects : The BindableList is still important... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4250#4250 Author: GregD
Subject: 986
Posted: 02-Apr-2009 at 6:16pm

The BindableList is still important if you're doing a Winforms user interface and want to take advantage of DevForce's WinForm support (BindingManagers, etc.)

If you're doing WPF or Silverlight, the System.Collections.ObjectModel.ObservableCollection<T> (part of .NET) offers similar functionality.
]]> Thu, 02 Apr 2009 18:16:53 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4250#4250 Binding Objects : Regarding: &#034;The BindableList... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4223#4223 Author: pucsoftware
Subject: 986
Posted: 31-Mar-2009 at 1:23pm

Regarding: "The BindableList included with DevForce EF is intended for legacy support"
 
What object would I use that is not a legacy object but would provide similar funtionality? Or is there a different way to do this entirely? I'm starting all over on my project since I've been away from it for a while so I have no legacy requirements at this time and I've only installed the EF version of DevForce. I'd like to start off correctly using only an EF design.
 
The code I'm converting:
 
/// <summary>Get Employees from Department</summary>
public BindableList<Employee> DivisionDepartments {
get {
 BindableList<Employee> mList = new BindableList<Employee>();
 mList.AddRange(this.Employees);
 return mList;
 }
}
 
I'm a little confused because when I created a new project IdeaBlade.Util was not included as a reference, but it looks like this assembly, as well as the BindableList object, is used extensively in all the examples I've looked at.
]]> Tue, 31 Mar 2009 13:23:14 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=4223#4223 Binding Objects : Thanks! Must have skipped that... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3975#3975 Author: smi-mark
Subject: 986
Posted: 04-Mar-2009 at 2:54pm

Thanks! Must have skipped that small step! :)]]> Wed, 04 Mar 2009 14:54:46 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3975#3975 Binding Objects : The BindableList included with... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3973#3973 Author: kimj
Subject: 986
Posted: 04-Mar-2009 at 2:22pm

The BindableList included with DevForce EF is intended for legacy support within DevForce and not outside use.  You can still use the IdeaBlade.Util.BindableList from DevForce Classic in your DevForce EF WinForms applications.  Several of the tutorials, including "Configuring a WinForm" from the 100 Fundamentals series, show how to use both DevForce EF and Classic in the same application.]]> Wed, 04 Mar 2009 14:22:00 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3973#3973 Binding Objects : Is there a reason that BindableList... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3970#3970 Author: smi-mark
Subject: 986
Posted: 04-Mar-2009 at 12:25pm

Is there a reason that BindableList is now declared as Friend instead of Public in IdeaBlade.Util.v4 ?]]> Wed, 04 Mar 2009 12:25:41 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3970#3970 Binding Objects : Happy to be of assistance! http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3590#3590 Author: GregD
Subject: 986
Posted: 07-Nov-2008 at 10:32pm

Happy to be of assistance!]]> Fri, 07 Nov 2008 22:32:49 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3590#3590 Binding Objects : Thanks for all the suggestions.... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3575#3575 Author: pucsoftware
Subject: 986
Posted: 06-Nov-2008 at 7:47am

Thanks for all the suggestions. Well explained and really helped to clear a couple of things up. I did get the application to compile. With these comments I can go back and refine the code with a better understanding of what I'm doing. Again, thanks for the help.
 
 
]]> Thu, 06 Nov 2008 07:47:17 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3575#3575 Binding Objects : Originally posted by pucsoftware I&#039;ve... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3571#3571 Author: GregD
Subject: 986
Posted: 05-Nov-2008 at 3:15pm

Originally posted by pucsoftware

I've tried the following:
 
var filterCurrentEmployees = new Predicate<Employee>(delegate(Employee anEmployee) {
 return anEmployee.Status.StatusCode  == "C";
});
     
mEmployeesFilter.AddRange(mEmployees);
mEmployeesFilter.ListManager = new EntityListManager<Employee>(mPersMgr, filterCurrentEmployees, null);
 
BUT now I get an incompatibility with the EntityListManager and the ListManager!
 
You now need to configure the link between the manager from the other direction:
 
    EntityListManager<Employee> elm = new EntityListManager<Employee>(mPersMgr, filterCurrentEmployees, null);
   elm.ManageList(mEmployeesFilter, true);
 
 
]]> Wed, 05 Nov 2008 15:15:37 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3571#3571 Binding Objects : Originally posted by pucsoftwareI&#039;ve... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3569#3569 Author: GregD
Subject: 986
Posted: 05-Nov-2008 at 2:57pm

Originally posted by pucsoftware


I've now changed the bold line to:
mEmployees = (BindableList<Employee>) mPersMgr.ExecuteQuery(query);
Is this correct? It's the only way I could get it to compile because the BindableList isn't compatible with IEnumerable, I think.

 
In general you should use
 
     mEmployees.ReplaceRange(IEnumerable<T> pValues)
 
to populate a BindableList.  What you did above replaces existing mEmployees with a new one, and therefore breaks any linkages you've already configured.  Specifically, if you say
 
    BindableList<Employee> mEmployees = new BindableList<Employee>();
    BindingSource mEmployeesBS = new BindingSource();
    mEmployeesBS.DataSource = mEmployees;
    mEmployees = any other BindableList returned by any method call
 
then the link between mEmployees and mEmployeesBS gets broken.  But if your last line was
 
     mEmployees.ReplaceRange( any IEnumerable<Employee> )
 
that link is not broken.

(FYI, all of the above applies equally to V3, except there you'd likely be using EntityLists rather than BindableLists.)
 
 

]]> Wed, 05 Nov 2008 14:57:20 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3569#3569 Binding Objects : Originally posted by pucsoftware So,... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3568#3568 Author: GregD
Subject: 986
Posted: 05-Nov-2008 at 2:55pm

Originally posted by pucsoftware

So, when declaring objects now it looks like I now have a choice of using a BindableList or BindingList. So, what is the difference and which one should I use?
 
 
Use the BindableList<T> if you're developing a user interface with Winforms and want to use DevForce data binding and the DevForce UI components and designers.
 
 
]]> Wed, 05 Nov 2008 14:55:23 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3568#3568 Binding Objects : I&#039;m converting a DevForce... http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3561#3561 Author: pucsoftware
Subject: 986
Posted: 04-Nov-2008 at 10:09am

I'm converting a DevForce classic application to DevForceEF. I'm new to the EF, Link, and DevForceEF so I'm having a problem understanding the upgrade and converting the code. For example here is some of my code:
 
private EntityList<LuActionType> mLuActionType;
private BindingList<Employee> mEmployeesBlank;
private EntityList<Employee> mEmployeesFilter;
private EntityList<Employee> mEmployees;
 
I've included the following references:
using IdeaBlade.EntityModel.v4;
using IdeaBlade.Util;
using DomainModel;
So, when declaring objects now it looks like I now have a choice of using a BindableList or BindingList. So, what is the difference and which one should I use?
 
USING A PASSTHRU. Here is my old code:
//-- using a passthru query
PassthruRdbQuery query = Employee.GetEmpoyeeDobByMonth(_currentmo.ToString());
query.QueryStrategy = QueryStrategy.DataSourceOnly;
mEmployees = mPersMgr.GetEntities<Employee>(query);
bsEmployee.DataSource = mEmployees;
 
I've now changed the bold line to:
mEmployees = (BindableList<Employee>) mPersMgr.ExecuteQuery(query);
 
Is this correct? It's the only way I could get it to compile because the BindableList isn't compatible with IEnumerable, I think.
 
USING A FILTER/PREDICATE
I've tried the following:
 
var filterCurrentEmployees = new Predicate<Employee>(delegate(Employee anEmployee) {
 return anEmployee.Status.StatusCode  == "C";
});
     
mEmployeesFilter.AddRange(mEmployees);
mEmployeesFilter.ListManager = new EntityListManager<Employee>(mPersMgr, filterCurrentEmployees, null);
 
BUT now I get an incompatibility with the EntityListManager and the ListManager!
 
I've looked through the examples and the developers guide but neither give me a full picture of how to do the conversions, nor do the uses of objects seem consistent between the examples. Any help would be appreciated.
 
 
]]> Tue, 04 Nov 2008 10:09:46 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=986&PID=3561#3561