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DbConnection.OpenAsync Method

.NET Framework 4.6 and 4.5

This method implements an asynchronous version of Open.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  Name Description
Public method OpenAsync() An asynchronous version of Open, which opens a database connection with the settings specified by the ConnectionString. This method invokes the virtual method OpenAsync with CancellationToken.None.
Public method OpenAsync(CancellationToken) This is the asynchronous version of Open. Providers should override with an appropriate implementation. The cancellation token can optionally be honored.The default implementation invokes the synchronous Open call and returns a completed task. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by Open will be communicated via the returned Task Exception property.Do not invoke other methods and properties of the DbConnection object until the returned Task is complete.

Exception Condition

An error occurred while opening the connection.

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

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