Close() End If End Sub Private Shared Sub On Row Updated( _ sender As Object, args As Sql Row Updated Event Args) If args.
Fill(data Set, "This Table") Private Shared Sub Fill Error(sender As Object, _ args As Fill Error Event Args) If args.
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.
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".
If the row had been modified, it called the appropriate , depending on the value of the Row State property for that row. Delete Command = New Sql Command( _ "DELETE FROM Production. The Copy To Rows method of the Row Updated Event Args class allows you to access the processed rows by copying references to the rows into an array.
As it iterated through the rows in the specified Data Table, it examined each Data Row to see if it had been modified. When batch processing is enabled, a single events are still generated for each row.
Row Updated = new Sql Row Updated Event Handler(On Row Updated); // Set Data Adapter command properties, fill Data Set, modify Data Set. Fill Error, New Fill Error Event Handler( _ Address Of Fill Error) Dim data Set As Data Set = New Data Set adapter. ' Add a row to table using the values from the first two columns.
Sql Data Adapter cust Adapter = new Sql Data Adapter( "SELECT Customer ID, Company Name FROM Customers", connection); // Add handlers. Row Updating = new Sql Row Updating Event Handler(On Row Updating); cust Adapter. Row Updated -= new Sql Row Updated Event Handler(On Row Updated); protected static void On Row Updating( object sender, Sql Row Updating Event Args args) protected static void On Row Updated( object sender, Sql Row Updated Event Args args) Add Handler adapter. Overflow Exception") Then ' Code to handle precision loss.
to modify update behavior before it happens, to provide additional handling when an update will occur, to retain a reference to an updated row, to cancel the current update and schedule it for a batch process to be processed later, and so on.
' Assumes that connection is a valid Sql Connection object.
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.
When batch updates are enabled, the Updated Row Source property value of the Data Adapter's should be set to None or Output Parameters. Insert Command = New Sql Command( _ "INSERT INTO Production. The data provider and the back-end database server determine which SQL constructs are supported for batch execution.
Setting it to 1 disables batch updates, as rows are sent one at a time. Batch execution has the same effect as the execution of each individual statement.