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Gridview OnRowUpdating

Posted on 2008-11-19
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Last Modified: 2013-11-26
Hi

I have a gridview which is populated from a query which concatenates a series of strings. This means that I can't directly edit via the edit button.

I have put an OnRowUpdating event handler which then changes the data progamatically. It seems to work fine except it doesn't reset the cancel/update buttons to edit.

   Protected Sub gwSubAddress_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
  ' does lots of stuff with stored procs which update the underlying data
        e.Cancel = True
    End Sub

How do I get the cancel/update buttons to be replaced with the edit button (ie have the effect of clicking the cancel button)

Thanks
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Question by:rchambers
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5 Comments
 
LVL 18

Expert Comment

by:David Robitaille
ID: 22994059
you should use the OnRowUpdatad that occurs after the update to reset the UI and check for error.
RowUpdating Does the job
RowUpdatad  Check the job and update the ui
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Author Comment

by:rchambers
ID: 22994217
Thanks

Sorry to be a pain but if I use e.cancel in the rowupdating handler then won't the OnRowUpdated fail to fire?

If I take the e.cancel out of the RowUpdating how do I reset it before I get the "Updating is not supported by data source 'sdsAddress' unless UpdateCommand is specified" error?
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Accepted Solution

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David Robitaille earned 2000 total points
ID: 22994340
i have to contest i dident noticed that. I think the problem is you shortcircuit the update process by using the e.cancel
The data is binded how? do you use a Object datasource?
 
i personally use BLL to handle that situation.
That has the aventage to isolate the data manipulation from the presentation layer.
RowUpdating manipulate the brute data and pass the unbinded parameter (if needed)
The datasource call the update function and throws any error that is not expected.
RowUpdated  catch the errors
 
in the rowupdated i use
e.ExceptionHandled = True
e.KeepInEditMode = True
 to keep the form in edit mode in case of error.
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Author Closing Comment

by:rchambers
ID: 31518220
that worked exactly as I wanted it to, thank you
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LVL 18

Expert Comment

by:David Robitaille
ID: 22994461
Hey, I m glad i could help you! I was felling i was not so clear in that last comment, but i guess you get the essence of what i wanted to say.
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