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XmlWriter.WriteString Method

When overridden in a derived class, writes the given text content.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)

public abstract void WriteString(
	string text
)

Parameters

text
Type: System.String

The text to write.

ExceptionCondition
ArgumentException

The text string contains an invalid surrogate pair.

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.”

WriteString does the following:

  • The characters &, <, and > are replaced with &amp;, &lt;, and &gt;, respectively.

  • The default behavior of an XmlWriter created using Create is to throw an ArgumentException when attempting to write character values in the range 0x-0x1F (excluding white space characters 0x9, 0xA, and 0xD). These invalid XML characters can be written by creating the XmlWriter with the CheckCharacters property set to false. Doing so will result in the characters being replaced with numeric character entities (&#0; through &#0x1F). Additionally, an XmlTextWriter created with the new operator will replace the invalid characters with numeric character entities by default.

Note   Microsoft does not encourage the practice of writing invalid XML characters since many applications that consume XML are not designed to handle invalid characters.

  • If WriteString is called in the context of an attribute value, double and single quotes are replaced with &quot; and &apos; respectively.

For example, this input string test<item>test is written out as

 test&lt;item&gt;test

If text is either null or String.Empty, this method writes a text node with no data content.

For the asynchronous version of this method, see WriteStringAsync.

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();  

  }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

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

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), 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.

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