XmlReader.ReadElementContentAsBase64Async Method
Asynchronously reads the element and decodes the Base64 content.
Namespace: System.Xml
Assembly: System.Xml (in System.Xml.dll)
'Declaration Public Overridable Function ReadElementContentAsBase64Async ( _ buffer As Byte(), _ index As Integer, _ count As Integer _ ) As Task(Of Integer)
Parameters
- buffer
- Type: System.Byte()
The buffer into which to copy the resulting text. This value cannot be Nothing.
- index
- Type: System.Int32
The offset into the buffer where to start copying the result.
- count
- Type: System.Int32
The maximum number of bytes to copy into the buffer. The actual number of bytes copied is returned from this method.
| Exception | Condition |
|---|---|
| InvalidOperationException | An XmlReader method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.” |
| InvalidOperationException | An XmlReader asynchronous method was called without setting the Async flag to true. In this case, InvalidOperationException is thrown with the message “Set XmlReaderSettings.Async to true if you want to use Async Methods.” |
This is the asynchronous version of ReadElementContentAsBase64, with the same functionality. To use this method, you must set the Async flag to true.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
