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error was Object reference not set to an instance of an object...

The common mistake is that they have re-bind the Form View control each postback , which will re Samu Zhang Microsoft Online Community Support Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. I just tried to do an update while in edit mode and got this error: Server Error in '/WAP' Application. NET 2.0 C# script with a Form View control that is bound to a SQLData Source.

First of all, using just Firstname won't help at all. If one is binding to related entities (thru navigation properties) then using Navigation Property Name. Second, the article you provided only deals with simple databinding to Entity Data Source and it does not say anything about Cascading Drop Down, with which, by the way, I happen to have problems also when used inside Form View with Entity Data Source as a datasource for the Form View. And my Data Object Type Name has: public Registrant Details() protected string first Name = String. Thanks for any clues as to what I must have missed. A validation control was actually tripping and keeping the page from updating. My Type Name has: public void Update Registrant( Registrant Details reg ) { Sql Connection con = new Sql Connection( connection String ); Sql Command cmd = new Sql Command( "Update Registrant", con ); cmd. No exceptions are generated and debugger shows the set and update methods aren't invoked. Actually that is just my example, but indeed postbacks don't work for any kind of databinding to related (included, "Include") entities.The Drop Down List controls in conjunction with AJAX enabled Cascading Drop Down controls (extenders) work fine, however, postback is not working.

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