Datatable rowupdating in c

You call the Row Updated event handler when a row is updated using the Update method of a data adapter, and you call Row Updating when a row is updating.As you can see from Listing 9-5, you can compare the Statement Type member of Ole Db Row Updating Event Args to the Statement Type enumeration to find out the statement type.

datatable rowupdating in c-88

It allows a user to determine whether a fill operation should continue.

The following examples demonstrate how to perform updates to modified rows by explicitly setting the Private Sub Adapter Update(By Val connection String As String) Using connection As Sql Connection = New Sql Connection( _ connection String) Dim adapter As Sql Data Adapter = New Sql Data Adapter( _ "SELECT Category ID, Category Name FROM dbo. Update Command = New Sql Command( _ "UPDATE Categories SET Category Name = @Category Name " & _ "WHERE Category ID = @Category ID", connection) adapter.

Fill(category Table) Dim category Row As Data Row = category Table.

One approach to solving this problem is to clone the command object so you have a different actual reference: This will work, but since the Command Builder is still connected to the Data Adapter, the Row Updating event will still fire and performance will be hit.

encounters a change to a Data Row, it uses the Insert Command, Update Command, or Delete Command to process the change. Rows(0) category Row("Category Name") = "New Beverages" adapter. Write Line("Rows after update.") Dim row As Data Row For Each row In category Table. Write Line(": ", row(0), row(1)) Next End Using End Sub either by returning the auto-increment value as an output parameter of a stored procedure and mapping that to a column in a table, by returning the auto-increment value in the first row of a result set returned by a stored procedure or SQL statement, or by using the are sent to the data source is important.

Leave a Reply