Represents an SQL statement that is executed while connected to a data source, and is implemented by .NET Framework data providers that access relational databases.
Assembly: System.Data (in System.Data.dll)
Gets or sets the text command to run against the data source.
Gets or sets the wait time before terminating the attempt to execute a command and generating an error.
Indicates or specifies how the CommandText property is interpreted.
Gets or sets the IDbConnection used by this instance of the .
Gets the IDataParameterCollection.
Gets or sets the transaction within which the Command object of a .NET Framework data provider executes.
Attempts to cancels the execution of an.
Creates a new instance of an IDbDataParameter object.
Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.(Inherited from IDisposable.)
Executes an SQL statement against the Connection object of a .NET Framework data provider, and returns the number of rows affected.
Executes the query, and returns the first column of the first row in the resultset returned by the query. Extra columns or rows are ignored.
Creates a prepared (or compiled) version of the command on the data source.
The Executing a Command.interface enables an inheriting class to implement a Command class, which represents an SQL statement that is executed at a data source. For more information about Command classes, see
An application does not create an instance of theinterface directly, but creates an instance of a class that inherits .
Notes to Implementers:
To promote consistency among .NET Framework data providers, name the inheriting class in the form PrvClassname where Prv is the uniform prefix given to all classes in a specific .NET Framework data provider namespace. For example, Sql is the prefix of the SqlCommand class in the System.Data.SqlClient namespace.
When you inherit from theinterface, you should implement the following constructors:
Initializes a new instance of the PrvCommand class.
Initializes a new instance of the PrvCommand class with the text of the query.
PrvCommand(string cmdText, PrvConnection connection)
Initializes a new instance of the PrvCommand class with the text of the query and a PrvConnection.
PrvCommand(string cmdText, PrvConnection connection, PrvTransaction transaction)
Initializes a new instance of the PrvCommand class with the text of the query, a PrvConnection, and the PrvTransaction.
The following example creates instances of the derived classes, SqlConnection, SqlCommand, and SqlDataReader. The example reads through the data, writing it to the console. Finally, the example closes the SqlDataReader, then the SqlConnection.
Available since 1.1