ExecuteReader Method (CommandBehavior)
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IDbCommand.ExecuteReader Method (CommandBehavior)


Executes the CommandText against the Connection, and builds an IDataReader using one of the CommandBehavior values.

Namespace:   System.Data
Assembly:  System.Data (in System.Data.dll)

IDataReader ExecuteReader(
	CommandBehavior behavior


Type: System.Data.CommandBehavior

One of the CommandBehavior values.

Return Value

Type: System.Data.IDataReader

An IDataReader object.

The caller must call the Open method of the Connection property.

When the CommandType property is set to StoredProcedure, the CommandText property should be set to the name of the stored procedure. The command executes this stored procedure when you call ExecuteReader.


Use SequentialAccess to retrieve large values and binary data. Otherwise, an OutOfMemoryException might occur and the connection will be closed.

While the IDataReader is in use, the associated IDbConnection is busy serving the IDataReader. While in this state, no other operations can be performed on the IDbConnection other than closing it. This is the case until the Close method of the DataReader is called. If the DataReader is created with CommandBehavior set to CloseConnection, closing the DataReader closes the connection automatically.

.NET Framework
Available since 1.1
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