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ReadElementContentAsBase64Async Method
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XmlReader::ReadElementContentAsBase64Async Method

.NET Framework 4.6 and 4.5

Asynchronously reads the element and decodes the Base64 content.

Namespace:  System.Xml
Assemblies:   System.Xml (in System.Xml.dll)
  System.Xml.ReaderWriter (in System.Xml.ReaderWriter.dll)

public:
virtual Task<int>^ ReadElementContentAsBase64Async(
	array<unsigned char>^ buffer, 
	int index, 
	int count
)

Parameters

buffer
Type: array<System::Byte>

The buffer into which to copy the resulting text. This value cannot be nullptr.

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.

Return Value

Type: System.Threading.Tasks::Task<Int32>
The number of bytes written to the buffer.

ExceptionCondition
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.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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