Forms Data Controls :: Examine Data At "itemupdating" Event In Detailsview

Jan 11, 2011

I have a detailsview that is a mix of textboxes and dropdown lists. Upon clicking update - i want to examine all of the fields that have changed and do a custom update. I am trying to capture the data using the ItemUpdating method, capturing 'e' as detailsViewUpdateEventArgs. If i specify DataKeyNames in the ASP:DetailsView and only use one key (the primarykey) then i can step through the e.oldvalues and e.newvalues examining the data - but i don't have access to the field names (except for the single key i entered).

If i use all fields from the DetailsView in the DataKeyNames parameter - then i have access to all the fieldnames via e.keys(n) - but at that point i don't have access to the e.oldvalues (count=0) I am greedy - i want the keynames, the oldvalues and the newvalues.

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So, to sum is up, I have a FormView:

[Code]....

And the relevant code:

[Code]....

What does work: I do see the right info if the formview is shown but when I click on the Update button it just doesnt fire the corresponding itemupdating event.

Can someone see what is wrong or missing?

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-edit-

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Here's the setup

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[Code]....

Environment:Web Developer 2008 Express .NET Fw. 3.5 Windows XP

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DetailsView control in edit mode, I pass parameters to the SqlDataSourceProducts (edit.aspx?id=2) and the data source selects the appropriate data and fills in the DetailsView form.

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I can go for not binding the data unless the field is changed, but does not sound professional and user friendly.

code:

The SqlDataSource used to select the parameters from the table and populate the DetailsView

[Code]....

The code of the fields that hold the DDLs in the DetailsView control

[Code]....

The codebehind:

[Code]....

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