Hi,
I am currently using VC++/Cli 2005. In a project, I'm using a DataGridView control to show records from a SQL Express 2005 table. Instead of updating a specific item directly within DataGridView control, I would like to open a new form and allow user to update selected record/item within that form. The reason to update this way is conditionned by the fact that I have 3 levels of detail as following:
Level 0 Level 1 Level 2
1:N 1:N
Furniture --> Component --> Component
You all understand that update form of Level1 will/must include, as Level0 do, another DataGridView control to display/detail all related items issued from next level. This explains why I can't allow user to update Level 1 directly from DataGridView control.
I've searched in MSDN and even bought a few books on subject but unfortunately I found nothing on how to do it this way. All articles on DataGridView control were only showing how to update record directly from control.
My approach, I think, would be to transmit to my level1 updating form, as a single parameter, the selected DataRow object (or a brand new one if currently adding) issued from DataGridView and let user update it's content. When User finally leaves level0 update form, then I presume that DataGridView corresponding table would be automatically updated according to DataGridView's content.
What would be the proper way to do it? I would certainly appreciate to hear you view on this.
Also, what can I do if I want to refresh DataGridView's content when coming back from update form. Is it done automatically? I would certainly be sure that it reflects the reality, not only when I update it myself but also especially when other users could concurrently update same records?
Thanks in advance,
Stphane
Hi Stephane,
It sounds like you're looking for a Master/Detail implementation. There are a number of topics covering this in MSDN, start with the first three hits on this search.
Mike
|||Hi Mike,
I followed links supplied. For what I could see, they are only showing how to put 2 DataGridView controls, master and detail, on same windows form and have data displayed accordingly. I already had a look at this technique. Unfortunately, this is not exactly what I'm looking for.
I'm definitely looking to be able to get/highlight a record (a row...) from a DataGridView control and then be able to perform any insert/update/delete operation, update its content using a new windows form which will be my "updating" form where user will be able to supply any required infos for that specific record/row instead of doing it directly from within DataGridView control.
Any hint or useful links?
Thanks again for your help,
Stphane
|||Hi Stephane,
First off, remember this is the SQL Express forum and you're asking about a VS component so you might get a better answer in one of the VS forums. I'd suggest the .NET Data Access forum as a place to start, but language specific forums or Windows Forms forums may also be usefull.
That said, if you start with this topic about using two DataGridViews but split the two DGs between two forms, it should just be a matter of writing some code to react to an action on the Master form. Check out the documentation for this control, there are a number of Properties that allow you to determin the selection as well as some events (i.e. OnClick) that should let you respond to user action in the control.
I'm guessing that if you ask around in the VS forums someone will have already written a framework to do this.
Mike
|||
Hi Mike,
Thanks for clarification. I must admit that I get quite lost when trying to find appropriate forum... Any document or article listing all forums and their purposes? Would certainly help!
I followed your link but anything I can find on MSDN is an example using 2 datagridviews on same form. For my case, I just try to find a way to, first, select a SQL table record from datagridview in form1, open a new form, form2, where I will enable user to update record's content. Scenario I illustrated could also include a second datagridview in form2.
Now browsing through the many forums available, it seems that there is one discussing specific issues regarding datagridview:
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=7&SiteID=1
Hope I will be able to get any hint from there!
Thanks for your help,
Stphane
|||Hi Stephanie,
You might be confused because many of the VS examples and Walkthroughs, including this one, do not walk you through using the VS UI to create the example, they use a 100% code based solution. The sample that I linked to provides code that programatically creates a form with two DataGridViews on it, attaches those DGVs to BindingSources and then hooks them up to the Northwind Database.
VS doesn't have many help topics that walk through specific tasks using the UI tools. I looked around on http://windowsforms.com and didn't really find anything that discusses how to use the UI to do this either, but you're welcome to take a look yourself as you may find some interesting material there.
There isn't a document listing all the fourms, but this page has them all. Each has a short description which hopefully describes it's use.
Mike
|||Hi again Mike,
Thanks for links. I will keep looking around. I got my hand on a book which seems to give some hints about DGVs. Hope I will find something...
Stphane
