Passing datagridview from form to class
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From: LuvinLunch on 22 Dec 2009 07:18 Hi, I need some advice on how to use a datagridview properly. I'm converting a vb6 app to vb.net. In the vb6 application I was passing an empty datagrid by referene to a class I'd written, I was populating the datagrid and passing it back to the form all set up for action. I've tried doing the same in vb.net but the class I've written doesn't recognise the datagridview. So my question is, is passing the datagridview from a form class to a class I've written the best way to populate my datagridview? I'm really keen to have the populating of the grid done in the class and not on the form. Should I be inheriting the grid into the class? Is the way I'm passing it incorrect? All advice gratefully received. LL
From: Joe Cool on 22 Dec 2009 09:18 On Dec 22, 7:18 am, LuvinLunch <martinamul...(a)yahoo.ie> wrote: > Hi, > > I need some advice on how to use a datagridview properly. I'm > converting a vb6 app to vb.net. In the vb6 application I was passing > an empty datagrid by referene to a class I'd written, I was populating > the datagrid and passing it back to the form all set up for action. > > I've tried doing the same in vb.net but the class I've written doesn't > recognise the datagridview. So my question is, is passing the > datagridview from a form class to a class I've written the best way to > populate my datagridview? I'm really keen to have the populating of > the grid done in the class and not on the form. Should I be > inheriting the grid into the class? Is the way I'm passing it > incorrect? > > All advice gratefully received. > I'm not sure but it sounds like the problem is that you don't have an: Imports System.Windows.Forms statement in the class.
From: LuvinLunch on 22 Dec 2009 09:45 Joe Cool, You're right. Oh dear, the joys of a new language. Thanks a million for your help. LL
From: Gregory A. Beamer on 22 Dec 2009 16:01 LuvinLunch <martinamullin(a)yahoo.ie> wrote in news:d21e0201-9edc-47ae- bef4-d3505872ff20(a)r5g2000yqb.googlegroups.com: > I've tried doing the same in vb.net but the class I've written doesn't > recognise the datagridview. So my question is, is passing the > datagridview from a form class to a class I've written the best way to > populate my datagridview? I'm really keen to have the populating of > the grid done in the class and not on the form. Should I be > inheriting the grid into the class? Is the way I'm passing it > incorrect? I am going to counter what "Joe" stated. In a "proper" app, the middle tier works with data as objects, not as pulled from controls. You are best to archtiect the solution so the bound data is what you are passing and not some view from a DataGrid. When you start working with UI controls, you tightly bind to the UI, making it hard to ever produce another type of UI for the app without rewriting a huge portion of the code. Yes, this may not be an issue for you, but it is something to think about esp. with the new technology being projectile vomited out at a high pace. Peace and Grace, -- Gregory A. Beamer (MVP) Twitter: @gbworld Blog: http://gregorybeamer.spaces.live.com ******************************************* | Think outside the box! | *******************************************
From: Cor Ligthert[MVP] on 23 Dec 2009 13:52
The datagridview (but that not alone) has a datasource, that is the way you handle it after VB6. Simply pass the content of the datasource (always an Ilist implementing type, but much more variations than the recordset) The only trouble can be as it is a anonymous class, but even that you can first convert tolist. Cor "LuvinLunch" <martinamullin(a)yahoo.ie> wrote in message news:d21e0201-9edc-47ae-bef4-d3505872ff20(a)r5g2000yqb.googlegroups.com... > Hi, > > I need some advice on how to use a datagridview properly. I'm > converting a vb6 app to vb.net. In the vb6 application I was passing > an empty datagrid by referene to a class I'd written, I was populating > the datagrid and passing it back to the form all set up for action. > > I've tried doing the same in vb.net but the class I've written doesn't > recognise the datagridview. So my question is, is passing the > datagridview from a form class to a class I've written the best way to > populate my datagridview? I'm really keen to have the populating of > the grid done in the class and not on the form. Should I be > inheriting the grid into the class? Is the way I'm passing it > incorrect? > > All advice gratefully received. > > LL |