GetFieldValueAsync<T>(Int32) Method

In This Topic

Asynchronously gets the value of the specified column as a type.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Function GetFieldValueAsync(Of T)( _
   ByVal ordinal As System.Integer _
) As System.Threading.Tasks.Task(Of T)

'Usage
 
Dim instance As VistaDBDataReader
Dim ordinal As System.Integer
Dim value As System.Threading.Tasks.Task(Of T)
 
value = instance.GetFieldValueAsync(Of T)(ordinal)

public System.Threading.Tasks.Task<T> GetFieldValueAsync<T>( 
   System.int ordinal
)

Parameters

ordinal: The type of the value to be returned.

Type Parameters

T: The type of the value to be returned.

Return Value

The type of the value to be returned.

Exceptions

Exception	Description
System.InvalidOperationException	The connection drops or is closed during the data retrieval. -or- The System.Data.Common.DbDataReader is closed during the data retrieval. -or- There is no data ready to be read (for example, the first System.Data.Common.DbDataReader.Read hasn't been called, or returned false). -or- Tried to read a previously-read column in sequential mode. -or- There was an asynchronous operation in progress. This applies to all Get* methods when running in sequential mode, as they could be called while reading a stream.
System.IndexOutOfRangeException	Trying to read a column that does not exist.
System.InvalidCastException	T doesn't match the type returned by the data source or cannot be cast.

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

Reference

VistaDBDataReader Class
VistaDBDataReader Members
Overload List

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