The problem is that I can't seem to access the values of the controls on the editing row. Item Updating Dim Drop Down Listddl As Drop Down List = List View. The following snipped uses two way binding to populate the name and student fields and it will also update them for you.
the Edit Template contains a few checkboxes, a dropdown and textbox. If you are not using a datasource that supports this you can do one other thing.
I use these rules of thumb not to have to look at that post all the time: So if you want to test if a specific column was changed you have to use the Item Updating instead of the Item Updated eventreceiver.
Is there a reason why do you want to use the Item Updated receiver specifically?
NET 4.0 (Web Forms) A snippet of code that I believe to be relevant below: The problem is that if I want to handle the old values, I can´t: this, evaluates to 0: int old Values Count = e. Count; and this, evaluates to null, even if I alter the value to a new one: string company Name Old = e.
If it's bound via Linq Data Source, Sql Data Source or Object Data Source I suggest you have a look at the Updating Event.
It allows developers to manually handle the operations, thus providing extra flexibility. Data Form Item, Rad Data Form Data Item) data Source. Data Form Item, Rad Data Form Editable Item) Dim new Values As New Hashtable() edited Item. Select Command = New Sql Command("SELECT Customer ID, Company Name, Contact Name, Contact Title, Address FROM Customers", conn) Dim my Data Table As New Data Table() conn.
For extracting the values needed for performing the respective CRUD operation can use the Extract Values method or reference the editors using Find Control and obtain their data. Extract Values(new Values) Dim edited Customer As Customer = data Source.
Protected Sub List View_Item Updating(By Val sender As Object, By Val e As System. You can use this to fetch the control values you want by handling the list views Item Command Event. I still have a problem, since using the Update Command in the aspx it expects an Item Updating event, which I now catch in Item Command. when I use another commandname I seem to have trouble with the viewstate when I reload my list ... I think I need to see some code before I can help, the command name should not cause Item Command to throw any errors.I´m using a Details View but when updating, I cannot get the Old Values because the Details View Update Event Args. Note: I´m not using a datasource component in my application (Sql Data Source, Object Data Source, Entity Data Source, etc.). object will be used for both the updating and updated events, and that instance won't be reused in the context of a separate update. To String() since it converts nulls to empty strings. At that point you will not have Before Properties to compare to.Note: - The list I am attaching this to does NOT have version history turned on.