Updating data sources with data adapters ado net
Populating a Data Set from a Data Adapter Describes how to fill a events and how to use them.Applications communicate with a database, firstly, to retrieve the data stored there and present it in a user-friendly way, and secondly, to update the database by inserting, modifying and deleting data. An application accesses data either through a dataset or a data reader.I beleive somethings act thur the data adapter and some don't. So, when you talk of moving things around, what you are actually doing is moving data around within or between the DATA SOURCES. A connection is made to bring over your data and then closed.That you may be doing that using some of the GUI facilities of the datagrid/s, and that the changes you have made in the data sources are then reflected in what the datagrids display, does not alter that basic truth. Turning to your actual question - should you "save as you go" so far as the database is concerned - my general answer would be "No". You can do what you want - as much or as little as you want - with your data and the database knows nothing about it.Retrieving Data Using a Data Reader Describes the ADO.NET Data Reader object and how to use it to return a stream of results from a data source.When changes are made to the dataset, the changes in the database are actually done by the data adapter. It is a disconnected, cached set of records that are retrieved from a database. Text = "tutorialspoint.com" End Sub Private Sub Button1_Click(sender As Object, e As Event Args) Handles Button1.When a connection is established with the database, the data adapter creates a dataset and stores data in it. Click Dim connection As Sql Connection = New sqlconnection() connection.
If i was wanting to edit a whole lot of data in a data grid switch items around, delete rows and new item Arrays to rows, and so forth (change heaps). I've had some problems where i've deleted rows and the row count acts like it's still there. You are best to think of a Data Grid as just a DISPLAY mechanism (which also allows editing) of data which is actually CONTAINED in the datasource.
Net applications for retrieving, accessing and updating data. Net object model is nothing but the structured process flow through various components.
A data provider is used for connecting to a database, executing commands and retrieving data, storing it in a dataset, reading the retrieved data and updating the database. Net consists of the following four objects − Data Adapter This is integral to the working of ADO.
The answer to that problem is not, however, to keep updating the database after every change.
It is to get your row count only of Current records.