Writer. Write Attribute String Async(String, String, String, String) Method
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Asynchronously writes out the attribute with the specified prefix, local name, namespace URI, and value.
public: System::Threading::Tasks::Task ^ WriteAttributeStringAsync(System::String ^ prefix, System::String ^ localName, System::String ^ ns, System::String ^ value);
public System.Threading.Tasks.Task WriteAttributeStringAsync (string prefix, string localName, string ns, string value);
public System.Threading.Tasks.Task WriteAttributeStringAsync (string? prefix, string localName, string? ns, string? value);
member this.WriteAttributeStringAsync : string * string * string * string -> System.Threading.Tasks.Task
Public Function WriteAttributeStringAsync (prefix As String, localName As String, ns As String, value As String) As Task
The namespace prefix of the attribute.
The local name of the attribute.
The namespace URI of the attribute.
The value of the attribute.
The task that represents the asynchronous
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."
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 method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by WriteAttributeString(String, String, String, String).