XmlWriter.WriteStartElement Method (String)
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When overridden in a derived class, writes out a start tag with the specified local name.
Namespace: System.Xml
Assembly: System.Xml (in System.Xml.dll)
| Exception | Condition |
|---|---|
| InvalidOperationException |
The writer is closed. |
| EncoderFallbackException |
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. |
| 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.” |
For the asynchronous version of this method, see System.Xml.XmlWriter.WriteStartElementAsync(System.String).
The following example writes an XML node.
using System; using System.IO; using System.Xml; public class Sample { public static void Main() { // Create a writer to write XML to the console. XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; settings.OmitXmlDeclaration = true; XmlWriter writer = XmlWriter.Create(Console.Out, settings); // Write the book element. writer.WriteStartElement("book"); // Write the title element. writer.WriteStartElement("title"); writer.WriteString("Pride And Prejudice"); writer.WriteEndElement(); // Write the close tag for the root element. writer.WriteEndElement(); // Write the XML and close the writer. writer.Close(); } }
Windows 8 Release Preview, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 SP2, 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.
