DataAsyncCommand Constructor
Creates a new instance of the DataAsyncCommand class.
Namespace: Microsoft.VisualStudio.Data.Framework
Assembly: Microsoft.VisualStudio.Data.Framework (in Microsoft.VisualStudio.Data.Framework.dll)
Syntax
'Déclaration
Protected Sub New
protected DataAsyncCommand()
protected:
DataAsyncCommand()
new : unit -> DataAsyncCommand
protected function DataAsyncCommand()
Remarks
DDEX providers can expose the ability to execute commands against their data source. This may include, but is not limited to, SQL statements, procedures, and functions.
Providers normally expose this functionality by implementing the DataCommand class, which provides synchronous command execution. When asynchronous command handling is needed, however, you can use the DataAsyncCommand class.
The DataAsyncCommand class extends command handling by providing asynchronous-capable versions of methods on the DataCommand class, as well as methods for canceling an asynchronous function call.
The DDEX runtime provides a default implementation of this class, which delegates to the synchronous methods provided by the DataCommand class. DDEX providers should need to provide their own implementations of this class only in special situations.
An implementation of this class is exposed as a service on the data connection.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.