Rowupdating event of the dataadapter
Row Updating is generated before the update occurs, and Row Updated is generated after the database update has been completed.
Update Batch Size = batch Size ' Execute the update. Update(data Table) End Using End Sub The Data Adapter has two update-related events: Row Updating and Row Updated. NET, when batch processing is disabled, each of these events is generated once for each row processed.
NET, the performed updates to the database one row at a time. When batch processing is disabled, the row being updated can be accessed using the Row property of the Row Updated Event Args class.
When updating a database with changes from a Data Set in previous versions of ADO. Therefore, only one event fire for the next row, until all of the rows are processed.
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.
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.
The My SQLData Adapter provides this bridge by mapping Fill(Data Set), which changes the data in the Data Set to match the data in the data source, and Update(Data Set), which changes the data in the data source to match the data in the Data Set, using the appropriate SQL statements against the data source.
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.
The procedure takes two arguments, a Data Set object that has columns representing the Product Category ID and Name fields in the Production.
Product Category table, and an integer representing the batch size (the number of rows in the batch).