Updating activex objects

21-Mar-2016 12:12

It involves the use of a connection manager that is responsible for maintaining a list, or pool, of available connections for a given connection string.Several pools exist if different connection strings ask for connection pooling.It consists of everything from strings to Global Unique Identifiers (GUIDs). Data Reader with Execute Reader() Method: Data Set class: A Data Set is a disconnected architecture technology. When you work with a dataset, the data in the data source is not touched at all.SQL data provider has Sql Db Type, and ODBC data provider has an ODBC type. Instead all the changes are made locally to the dataset in memory. NET components categorized in three modes: disconnected, common or shared and the . Shared or common components are the base classes for data providers and shared by all data providers.

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.Execute Reader is used when we need to retrieve rows and columns of data using the SQL select statements. NET only holds the connection open long enough to either pull down the data or to make any requested updates. This is nice when you are working with other business applications and also helps when you are working with firewalls because data is passed as HTML and XML. NET gives you the choice of either using client-side or server-side cursors. Answer 8: A Data Adapter represents a set of data commands and a database connection to fill the dataset and update a SQL Server database. With these two, you can also specify the user ID and password depending on the type of data source.As the data retrieved is a table of data, Execute Reader returns Sql Data Reader. A Data Adapter contains a set of data commands and a database connection to fill the dataset and update a SQL Server database. Figure 3-3 shows the relationship between a connection, a data source, and a data adapter.This is different from the Select method of the Data Table, which returns a Data Row array from a table per particular filter and/or sort order and whose content reflects changes to the underlying table, but whose membership and ordering remain static. Original, null)); See for more detail: Answer 20: The Execute Non Query method is used to execute the command and return the number of rows affected. It represents a relationship between database tables and correlates tables on the basis of matching column.The dynamic capabilities of the Data View make it ideal for data-binding applications. The Execute Non Query method cannot be used to return the result set. Example: Sql Connection obj=new Sql Connection(“Integrated Security=true; Initial Catalog=Table_Name; Data Source=.”);-- for Windows authentication Sql Connection obj=new Sql Connection(“user id= sa ; Password=sa123;server=.;database=name”); --Sql server Authentication Answer: ADO.

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.Execute Reader is used when we need to retrieve rows and columns of data using the SQL select statements. NET only holds the connection open long enough to either pull down the data or to make any requested updates. This is nice when you are working with other business applications and also helps when you are working with firewalls because data is passed as HTML and XML. NET gives you the choice of either using client-side or server-side cursors. Answer 8: A Data Adapter represents a set of data commands and a database connection to fill the dataset and update a SQL Server database. With these two, you can also specify the user ID and password depending on the type of data source.As the data retrieved is a table of data, Execute Reader returns Sql Data Reader. A Data Adapter contains a set of data commands and a database connection to fill the dataset and update a SQL Server database. Figure 3-3 shows the relationship between a connection, a data source, and a data adapter.This is different from the Select method of the Data Table, which returns a Data Row array from a table per particular filter and/or sort order and whose content reflects changes to the underlying table, but whose membership and ordering remain static. Original, null)); See for more detail: Answer 20: The Execute Non Query method is used to execute the command and return the number of rows affected. It represents a relationship between database tables and correlates tables on the basis of matching column.The dynamic capabilities of the Data View make it ideal for data-binding applications. The Execute Non Query method cannot be used to return the result set. Example: Sql Connection obj=new Sql Connection(“Integrated Security=true; Initial Catalog=Table_Name; Data Source=.”);-- for Windows authentication Sql Connection obj=new Sql Connection(“user id= sa ; Password=sa123;server=.;database=name”); --Sql server Authentication Answer: ADO.Example of Pooling: Answer 6: The Sql Command carries the SQL statement that needs to be executed on the database.