ExecuteScalarAsync() Method
In This Topic
An asynchronous version of System.Data.Common.DbCommand.ExecuteScalar, which executes the query and returns the first column of the first row in the result set returned by the query. All other columns and rows are ignored. Invokes System.Data.Common.DbCommand.ExecuteScalarAsync(System.Threading.CancellationToken) with CancellationToken.None.
Syntax
'Declaration
Public Overloads Function ExecuteScalarAsync() As System.Threading.Tasks.Task(Of Object)
'Usage
Dim instance As VistaDBCommand
Dim value As System.Threading.Tasks.Task(Of Object)
value = instance.ExecuteScalarAsync()
public System.Threading.Tasks.Task<object> ExecuteScalarAsync()
Return Value
A task representing the asynchronous operation.
Exceptions
| Exception | Description |
|---|
| System.Data.Common.DbException | An error occurred while executing the command text. |
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
See Also