Rowupdating e keys

19-Feb-2015 13:41 by 4 Comments

Rowupdating e keys

I can't delete a row from this table using Npgsql Data Adapter, I always get an exception "System. DBConcurrency Exception: Concurrency violation: the Delete Command affected 0 of the expected 1 records.".

A datakey represents the primary key field or field of a record that can uniquely identify it in a data-bound control. Row Index represents the index of the particular row.

Notice that the programing is not running the event Row Updated any help?

Close() End If End Sub the problem is that the event row Updating is returning the old values so how can i get the new values for the update?

We can achieve the same functionality using Datakeys.

In this example, I am going to retrieve values from categories table of Northwind database. Drag a Grid View into the Web Form and assign Data Key Names property with the primary key column i.e. In the gdview_Row Editing and gdview_Row Deleting event, we have used the below code to retrieve categoryid from datakey of Grid View, int catid = int.

I am binding to a custom datasource in the code behind.

It gets into the "On Row Updating" event just fine, but there are no New Values or Old Values. Regarding on the Grid View control's Row Updating event problem, it is the expected behavior because when we do not associate Grid View(or other ASP.Here is my code to reproduce this behaviour: using (var connection = new Npgsql Connection(connection String)) Exception message: System. DBConcurrency Exception: Concurrency violation: the Delete Command affected 0 of the expected 1 records. Updated Row Status(Row Updated Event Args row Updated Event, Batch Command Info[] batch Commands, Int32 command Count) at System. Text Dim command As Sql Command = New Sql Command("updatetest", cn) command. Add With Value("@pfirstname", str Last Name) If cn. Welcome to the Coding Forums, the place to chat about anything related to programming and coding languages.

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    When the user clicks the edit command button the selected row will change into the edit form.

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