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)
Return Value
Type: System.SingleThe 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 Reading Typed Data and the W3C XML Schema Part 2: Datatypes recommendation.
For the asynchronous version of this method, see ReadContentAsFloatAsync.
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.
