For demonstration I have created a database (named Database.mdf) in which we have a table named tbl_Employee.
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event is raised when a row's Update button is clicked, but after the Grid View control updates the row.
This enables you to provide an event-handling method that performs a custom routine, such as checking the results of the update operation, whenever this event occurs.
Dim cust Adapter As Sql Data Adapter = New Sql Data Adapter( _ "SELECT Customer ID, Company Name FROM Customers", connection) ' Add handlers. Row Updating, New Sql Row Updating Event Handler( _ Address Of On Row Updating) Add Handler cust Adapter. Row Updating, _ New Sql Row Updating Event Handler(Address Of On Row Updating) Remove Handler cust Adapter.
Row Updated, New Sql Row Updated Event Handler( Address Of On Row Updated) ' Set Data Adapter command properties, fill Data Set, and modify Data Set. Update(cust DS, "Customers") ' Remove handlers. Row Updated, _ New Sql Row Updated Event Handler(Address Of On Row Updated) Private Shared Sub On Row Updating(sender As Object, _ args As Sql Row Updating Event Args) If args.
I have set the requisite attributes in the Grid View tag.
(Note, in the gridview the Enable View State="False" - if I set it to True I get the standard "Failed to load viewstate. error) One strange thing that I've noticed that makes me think it's a View State problem is that if I change the Command Name of the Update button to "Edit" that postback event does get captured in the Row Command event...
I removed everything I did with View State and edited the original post again with what I currently got. I cannot sort the Grid View because I'm trying to sort with Your code doesn't have Data Source ID.
NET allows a Data Adapter to group INSERT, UPDATE, and DELETE operations from a Data Set or Data Table to the server, instead of sending one operation at a time. Every row update involved a network round-trip to the database. NET 2.0, the Db Data Adapter exposes an Update Batch Size property. Product Category " _ & "WHERE Product Category [email protected] Cat ID;", connection) adapter. If no rows are being processed, throws an Argument Null Exception.
The reduction in the number of round trips to the server typically results in significant performance gains. Setting the to 0 will cause the Data Adapter to use the largest batch size that the server can handle. Use the Row Count property to return the number of rows processed before calling the Copy To Rows method.
Message End If End Sub // Assumes that connection is a valid Sql Connection object. Row Updating -= new Sql Row Updating Event Handler(On Row Updating); cust Adapter. Add(New Object() _ ) ' Set the Row Error containing the value for the third column.
I have a Gridview with Auto Generate Columns="False".
Therefore, you should test for the optimum batch size setting before implementing your application. Errors are handled the same way in batch mode as they are when batch mode is disabled. Only rows that have been successfully processed in the database will be updated in the corresponding Data Row within the Data Table.