IDbCommand.ExecuteReader Method

Definition

Namespace:

System.Data

Assembly:

System.Data.Common.dll

Executes the CommandText against the Connection and builds an IDataReader.

Overloads

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

ExecuteReader()

Executes the CommandText against the Connection and builds an IDataReader.

public:
 System::Data::IDataReader ^ ExecuteReader();

public System.Data.IDataReader ExecuteReader ();

abstract member ExecuteReader : unit -> System.Data.IDataReader

Public Function ExecuteReader () As IDataReader

Returns

IDataReader

An IDataReader object.

ExecuteReader(CommandBehavior)

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

public:
 System::Data::IDataReader ^ ExecuteReader(System::Data::CommandBehavior behavior);

public System.Data.IDataReader ExecuteReader (System.Data.CommandBehavior behavior);

abstract member ExecuteReader : System.Data.CommandBehavior -> System.Data.IDataReader

Public Function ExecuteReader (behavior As CommandBehavior) As IDataReader

Parameters

behavior

CommandBehavior

One of the CommandBehavior values.

Returns

IDataReader

An IDataReader object.

Remarks

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.

Note

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.