DataSet : Dataset is used to store the data retrieved from database by dataadapter and make it available for .net application.
When fill method was called, dataadapter will open a connection to database, executes select command, stores the data retrieved by select command in to dataset and immediately closes the connection.
As connection to database was closed, any changes to the data in dataset will not be directly sent to the database and will be made only in the dataset. To send changes made to data in dataset to the database, Update() method of the dataadapter is used that has the following syntax.
When Update method was called, dataadapter will again open the connection to database, executes insert, update and delete commands to send changes in dataset to database and immediately closes the connection. As connection is opened only when it is required and will be automatically closed when it was not required, this architecture is called disconnected architecture.
A dataset can contain data in multiple tables.
To fill data in to dataset fill() method of dataadapter is used and has the following syntax.
Da.Fill(Ds,”TableName”);
When fill method was called, dataadapter will open a connection to database, executes select command, stores the data retrieved by select command in to dataset and immediately closes the connection.
As connection to database was closed, any changes to the data in dataset will not be directly sent to the database and will be made only in the dataset. To send changes made to data in dataset to the database, Update() method of the dataadapter is used that has the following syntax.
Da.Update(Ds,”Tablename”);
When Update method was called, dataadapter will again open the connection to database, executes insert, update and delete commands to send changes in dataset to database and immediately closes the connection. As connection is opened only when it is required and will be automatically closed when it was not required, this architecture is called disconnected architecture.
A dataset can contain data in multiple tables.
