XmlWriter::WriteDocTypeAsync Method (String^, String^, String^, String^)
Asynchronously writes the DOCTYPE declaration with the specified name and optional attributes.
Assembly: System.Xml (in System.Xml.dll)
public: virtual Task^ WriteDocTypeAsync( String^ name, String^ pubid, String^ sysid, String^ subset )
Parameters
- name
-
Type:
System::String^
The name of the DOCTYPE. This must be non-empty.
- pubid
-
Type:
System::String^
If non-null it also writes PUBLIC "pubid" "sysid" where pubid and sysid are replaced with the value of the given arguments.
- sysid
-
Type:
System::String^
If pubid is null and sysid is non-null it writes SYSTEM "sysid" where sysid is replaced with the value of this argument.
- subset
-
Type:
System::String^
If non-null it writes [subset] where subset is replaced with the value of this argument.
Return Value
Type: System.Threading.Tasks::Task^The task that represents the asynchronous WriteDocType operation.
| Exception | Condition |
|---|---|
| InvalidOperationException | An XmlWriter 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 XmlWriter asynchronous method was called without setting the Async flag to true. In this case, InvalidOperationException is thrown with the message “Set XmlWriterSettings.Async to true if you want to use Async Methods.” |
This is the asynchronous version of WriteDocType, with the same functionality. To use this method, you must set the Async flag to true.
Available since 8
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1