Updating dataadapter access
The following is the code and its explanation: Answer: Parameters in conjunction with Select Command to help you Select data for the Data Set. The object of the Data Reader cannot be directly instantiated.
The Ole Db Type describes the type information for the parameter. Instead you must call the Execute Reader method of the Command object and close the connection when you are done using the Data Reader otherwise the connection remains alive until it is explicitly closed.
Since this method performs faster we do not need to go for the Reader method just to retrieve a single scalar value. Creating a Command Builder Object: Creating a Commoned Buider object is pretty simply.
Execute Non Query is useful for performing data manipulation on the database. You pass a Data Adapter as an argument of the Command Builder constructor.
Example of Pooling: Answer 6: The Sql Command carries the SQL statement that needs to be executed on the database.
The return value of the Execute Non Query is an integral value that represents the number of rows affected by the Operation. Connected object can be used on disconnected object. NET allows you to manipulate your data using XML as the primary means. The developer has the freedom of choice in internet development, for creating efficient applications. Some of the provider-specific namespaces are System. You need to define a data provider and a data source when you create a connection.How we can create a Data View There are two ways to create a Data View. Snippets working with Execute Non Query Answer: The Data Relation is a class of disconnected architecture in the . NET is a set of classes (a framework) to interact with data sources such as databases and XML files. It allows us to connect to underlying data or databases. NET to connect to a database, execute commands and retrieve data from the database. NET: To create a connection, you must be familiar with connection strings.You can use the Data View constructor, or you can create a reference to the Default View property of the Data Table. It has classes and methods to retrieve and manipulate data. A connection string is required as a parameter to SQLConnection.Using a Data View, you can expose the data in a table with different sort orders, and you can filter the data by row state or based on a filter expression.
A Data View provides a dynamic view of data whose content, ordering, and membership reflect changes to the underlying Data Table as they occur.
You can use these components (or classes) with or without data providers.