Updating data sources with data adapters ado net
NET Framework Data Provider for ODBC includes an Odbc Data Reader and an Odbc Data Adapter object, and the .NET Framework Data Provider for Oracle includes an Oracle Data Reader and an Oracle Data Adapter object.After the data is retrieved and stored in a dataset, the connection with the database is closed. The dataset works as a virtual database containing tables, rows, and columns. Connection String = "Data Source=KABIR-DESKTOP; _ Initial Catalog=test DB; Integrated Security=True" connection. Tables(0) End Sub End Class We have discussed that the Data Set components like Data Table, Data Column and Data Row allow us to create tables, columns and rows, respectively.The following diagram shows the dataset object model − The Data Set class is present in the System. The following table describes all the components of Data Set − Data Row It represents a row in the Data Table. Open() Dim adp As Sql Data Adapter = New Sql Data Adapter _ ("select * from Customers", connection) Dim ds As Data Set = New Data Set() adp. The following example demonstrates the concept − So far, we have used tables and databases already existing in our computer.Click Dim ds As New Data Set ds = Create Data Set() Data Grid View1. , no information about the connection, database, tables, columns, or any other details about the source of the data is available in the disconnected objects.
But, such cases apart, there is no need constantly to send data back to the database. Delete a record from a Data Table it is not immediately removed. Row State flag is set to Deleted so that, the next time the Data Adapter's . NET Data Reader to retrieve a read-only, forward-only stream of data from a database.Results are returned as the query executes, and are stored in the network buffer on the client until you request them using the Read method of the Data Reader. I have 2 datagrids which are filled with datasets where the sata is got using data adapters.I wish to know, If I am moving data from one row in a datagrid, to another row in another datagrid.
The answer to that problem is not, however, to keep updating the database after every change.