ReadContentAsFloat Method
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XmlReader.ReadContentAsFloat Method ()

 

Reads the text content at the current position as a single-precision floating point number.

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

public virtual float ReadContentAsFloat()

Return Value

Type: System.Single

The text content at the current position as a single-precision floating point number.

Exception Condition
InvalidCastException

The attempted cast is not valid.

FormatException

The string format is not valid.

InvalidOperationException

An XmlReader 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 method concatenates text, white space, significant white space, and CDATA sections, and skips any comments or processing instructions. Entity references are automatically resolved.

If the content is typed xsd:float, the reader returns an unboxed a single-precision floating point number. If the content is not typed xsd:float, the reader attempts to convert it to a single-precision floating point number according to the rules defined by the W3C XML Schema Part 2: Datatypes recommendation.

The following table describes how this method treats each node type.

XmlNodeType

Return value

Reader behavior

Text

CDATA

Whitespace

SignificantWhitespace

EntityReference

EndEntity

Concatenated content of text, CDATA, white space and significant white space nodes converted to the requested type.

Moves to the next start element or end element tag. Entity references are automatically expanded.

Attribute

Same as calling XmlConvert.ToXxx on the attribute value.

The reader remains in the current position.

Comment

ProcessingInstruction

Ignores the processing instruction (PI) or comment and reads the concatenated text content that follows the PI or comment.

Moves to the next start element or end element tag. Entity references are automatically expanded.

EndElement

An empty string.

The reader remains in the current position.

Element

XmlDeclaration

None

Document

DocumentType

Notation

Entity

DocumentFragment

An InvalidOperationException is thrown.

Undefined, although typically the reader remains in the current position.

For more information, see the Remarks section of the XmlReaderreference page and the W3C XML Schema Part 2: Datatypes recommendation.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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