Reader. Read Content AsDouble Method
Reads the text content at the current position as a double-precision floating-point number.
public: virtual double ReadContentAsDouble();
public virtual double ReadContentAsDouble ();
abstract member ReadContentAsDouble : unit -> double override this.ReadContentAsDouble : unit -> double
Public Overridable Function ReadContentAsDouble () As Double
The text content as a double-precision floating-point number.
The attempted cast is not valid.
The string format is not valid.
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:double, the reader returns a double-precision floating-point number. If the content is not typed
xsd:double, the reader attempts to convert it to a double-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|
||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.|
||Same as calling
||The reader remains in the current position.|
||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.|
||An empty string.||The reader remains in the current position.|
||An InvalidOperationException is thrown.||Undefined, although typically the reader remains in the current position.|