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XmlWriter.WriteValue Method (Double)

Writes a Double value.

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

public virtual void WriteValue (
	double value
)
public void WriteValue (
	double value
)
public function WriteValue (
	value : double
)
Not applicable.

Parameters

value

The Double value to write.

Exception typeCondition

ArgumentException

An invalid value was specified.

This method takes the common language runtime object and converts the input value to the desired output type using the XML Schema definition language (XSD) data type conversion rules.

When the WriteValue method is called, the XmlWriter converts the value to its string representations according to the XML Schema (XSD) data type rules and writes it out using the WriteString method.

If WriteValue is called multiple times in succession, the values are not delimited by a space. You must call WriteWhitespace between calls to WriteValue to insert white space. Pass an array type to the XmlWriter.WriteValue(Object) overload to write out an array of distinct values.

If this method is called on an XmlWriter instance that outputs text-only, the typed value is serialized to text.

For more information, see Writing Typed Data.

The following example writes a book node using typed data.

Double price = 9.95;
DateTime date = new DateTime(2004, 5, 20);

using (XmlWriter writer = XmlWriter.Create("data.xml")) {
  writer.WriteStartElement("book");
  writer.WriteStartAttribute("pub-date");
  writer.WriteValue(date);
  writer.WriteEndAttribute();

  writer.WriteStartElement("price");
  writer.WriteValue(price);
  writer.WriteEndElement();

  writer.WriteEndElement();
  writer.Flush();
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

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