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Showing content from https://learn.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqlcommand.executereaderasync below:

SqlCommand.ExecuteReaderAsync Method (System.Data.SqlClient) | Microsoft Learn

Initiates the asynchronous execution of the Transact-SQL statement or stored procedure that is described by this SqlCommand.

For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.

Source:

System.Data.SqlClient.notsupported.cs

public:
 System::Threading::Tasks::Task<System::Data::SqlClient::SqlDataReader ^> ^ ExecuteReaderAsync();

public System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader> ExecuteReaderAsync();

override this.ExecuteReaderAsync : unit -> System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader>

Public Function ExecuteReaderAsync () As Task(Of SqlDataReader)

A task representing the asynchronous operation.

SQL Server returned an error while executing the command text.

-or-

A timeout occurred during a streaming operation. For more information about streaming, see SqlClient Streaming Support.

For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by ExecuteReader().

• ADO.NET Overview

Source:

System.Data.SqlClient.notsupported.cs

public:
 System::Threading::Tasks::Task<System::Data::SqlClient::SqlDataReader ^> ^ ExecuteReaderAsync(System::Data::CommandBehavior behavior);

public System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader> ExecuteReaderAsync(System.Data.CommandBehavior behavior);

override this.ExecuteReaderAsync : System.Data.CommandBehavior -> System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader>

Public Function ExecuteReaderAsync (behavior As CommandBehavior) As Task(Of SqlDataReader)

A task representing the asynchronous operation.

SQL Server returned an error while executing the command text.

-or-

A timeout occurred during a streaming operation. For more information about streaming, see SqlClient Streaming Support.

For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by ExecuteReader(CommandBehavior).

• ADO.NET Overview

Source:

System.Data.SqlClient.notsupported.cs

An asynchronous version of ExecuteReader(), which sends the CommandText to the Connection and builds a SqlDataReader.

The cancellation token can be used to request that the operation be abandoned before the command timeout elapses. Exceptions will be reported via the returned Task object.

public:
 System::Threading::Tasks::Task<System::Data::SqlClient::SqlDataReader ^> ^ ExecuteReaderAsync(System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader> ExecuteReaderAsync(System.Threading.CancellationToken cancellationToken);

override this.ExecuteReaderAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader>

Public Function ExecuteReaderAsync (cancellationToken As CancellationToken) As Task(Of SqlDataReader)

A task representing the asynchronous operation.

SQL Server returned an error while executing the command text.

-or-

A timeout occurred during a streaming operation. For more information about streaming, see SqlClient Streaming Support.

The cancellation token was canceled. This exception is stored into the returned task.

For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by ExecuteReader().

• ADO.NET Overview

Source:

System.Data.SqlClient.notsupported.cs

public:
 System::Threading::Tasks::Task<System::Data::SqlClient::SqlDataReader ^> ^ ExecuteReaderAsync(System::Data::CommandBehavior behavior, System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader> ExecuteReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken);

override this.ExecuteReaderAsync : System.Data.CommandBehavior * System.Threading.CancellationToken -> System.Threading.Tasks.Task<System.Data.SqlClient.SqlDataReader>

Public Function ExecuteReaderAsync (behavior As CommandBehavior, cancellationToken As CancellationToken) As Task(Of SqlDataReader)

A task representing the asynchronous operation.

SQL Server returned an error while executing the command text.

-or-

A timeout occurred during a streaming operation. For more information about streaming, see SqlClient Streaming Support.

The cancellation token was canceled. This exception is stored into the returned task.

For more information about asynchronous programming in the .NET Framework Data Provider for SQL Server, see Asynchronous Programming.

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by ExecuteReader(CommandBehavior).

• ADO.NET Overview

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