WriteStartAttribute Méthode (String, String)
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XmlWriter.WriteStartAttribute, méthode (String, String)


Écrit le début d'un attribut avec le nom local et l'URI de l'espace de noms spécifiés.

Espace de noms:   System.Xml
Assembly:  System.Xml (dans System.Xml.dll)

public void WriteStartAttribute(
	string localName,
	string ns



Le nom local de l'attribut.


L'URI de l'espace de noms de l'attribut.

Exception Condition

There is a character in the buffer that is a valid XML character but is not valid for the output encoding.For example, if the output encoding is ASCII, you should only use characters from the range of 0 to 127 for element and attribute names.The invalid character might be in the argument of this method or in an argument of previous methods that were writing to the buffer.Such characters are escaped by character entity references when possible (for example, in text nodes or attribute values).However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.


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.”

This is a more advanced version of WriteAttributeString that allows you to write an attribute value using multiple write methods, such as WriteString, WriteQualifiedName, and so on.

For the asynchronous version of this method, see M:System.Xml.XmlWriter.WriteStartAttributeAsync(System.String,System.String).

See XmlTextWriter.WriteStartAttribute for an example using this method.

Universal Windows Platform
Disponible depuis 4.5
.NET Framework
Disponible depuis 1.1
Portable Class Library
Pris en charge dans : portable .NET platforms
Disponible depuis 2.0
Windows Phone Silverlight
Disponible depuis 7.0
Windows Phone
Disponible depuis 8.1
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