XmlReader.HasValue Property
Definition
Important
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When overridden in a derived class, gets a value indicating whether the current node can have a Value.
public:
virtual property bool HasValue { bool get(); };
public:
abstract property bool HasValue { bool get(); };
public virtual bool HasValue { get; }
public abstract bool HasValue { get; }
member this.HasValue : bool
Public Overridable ReadOnly Property HasValue As Boolean
Public MustOverride ReadOnly Property HasValue As Boolean
Property Value
true
if the node on which the reader is currently positioned can have a Value
; otherwise, false
. If false
, the node has a value of String.Empty
.
Exceptions
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."
Examples
See HasValue (in the XmlTextReader
class) for a sample using this method.
Remarks
The following table lists node types that have a value to return.
Node Type | Value |
---|---|
Attribute |
The value of the attribute. |
CDATA |
The content of the CDATA section. |
Comment |
The content of the comment. |
DocumentType |
The internal subset. |
ProcessingInstruction |
The entire content, excluding the target. |
SignificantWhitespace |
The white space between markup in a mixed content model. |
Text |
The content of the text node. |
Whitespace |
The white space between markup. |
XmlDeclaration |
The content of the declaration. |