Tableadapter not updating
Every line in the widget displaying the data consists of a layout which can be as complex as you want.
A typical line in a list has an image on the left side and two text lines in the middle as depicted in the following graphic. In case you do not find any icons just copy "icon.png" and use a drawing program to change it a little bit and create a second one.
The Data Set object is designed to encourage the use of optimistic concurrency for long-running activities, such as remoting data and interacting with data.
Pessimistic concurrency involves locking rows at the data source to prevent other users from modifying data in a way that affects the current user.
The following uses two images "no.png" and "ok.png". typically contains more data than the number of displayed rows.
If the user scrolls the list, then the rows and their associated views will be scrolled out of the visible area.
By contrast, users who use optimistic concurrency do not lock a row when reading it.
Typically the user interacts with the list via the toolbar, for example, via a button which refreshes the list. This selection can update the toolbar or can trigger a detailed screen for the selection. On the selection of a list item another activity is started.
In a multiuser environment, there are two models for updating data in a database: optimistic concurrency and pessimistic concurrency.
Introduction A Data Grid View control can be used to display data from a database.
A table can be displayed from a database in a Data Grid View, using the Data Adapter class and data logic.
However, data control is not a very flexible tool as it could only work with limited kinds of data and must work strictly in the Visual Basic environment. Update End Sub Private Sub cmd Delete_Click() Confirm = Msg Box("Are you sure you want to delete this record?
To overcome these limitations, we can use a much more powerful data control in Visual Basic, known as ADO control. As ADO is Active X-based, it can work in different platforms and different programming languages. ", vb Yes No, "Deletion Confirmation") If Confirm = vb Yes Then ado Books.