XmlReader.ReadElementContentAsLong Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Reads the current element and returns the contents as a 64-bit signed integer.
ReadElementContentAsLong() |
Reads the current element and returns the contents as a 64-bit signed integer. |
ReadElementContentAsLong(String, String) |
Checks that the specified local name and namespace URI matches that of the current element, then reads the current element and returns the contents as a 64-bit signed integer. |
- Source:
- XmlReader.cs
- Source:
- XmlReader.cs
- Source:
- XmlReader.cs
Reads the current element and returns the contents as a 64-bit signed integer.
public:
virtual long ReadElementContentAsLong();
public virtual long ReadElementContentAsLong ();
abstract member ReadElementContentAsLong : unit -> int64
override this.ReadElementContentAsLong : unit -> int64
Public Overridable Function ReadElementContentAsLong () As Long
Returns
The element content as a 64-bit signed integer.
Exceptions
The XmlReader is not positioned on an element.
-or-
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."
The current element contains child elements.
-or-
The element content cannot be converted to a 64-bit signed integer.
The method is called with null
arguments.
Examples
The following example uses the ReadElementContentAsLong method to read the content of the longValue
element.
using (XmlReader reader = XmlReader.Create("dataFile.xml")) {
reader.ReadToFollowing("longValue");
long number = reader.ReadElementContentAsLong();
// Do some processing with the number object.
}
Using reader As XmlReader = XmlReader.Create("dataFile.xml")
reader.ReadToFollowing("longValue")
Dim number As Long = reader.ReadElementContentAsLong()
' Do some processing with the number object.
End Using
The example uses the dataFile.xml
file as input.
<root>
<stringValue>
<!--comment-->
<?some pi?>
text value of the element.
</stringValue>
<longValue>270000000000001</longValue>
<number>0</number>
<double>2E10</double>
<date>2003-01-08T15:00:00-00:00</date>
</root>
Remarks
This method reads the start tag, the contents of the element, and moves the reader past the end element tag. It expands entities and ignores processing instructions and comments. The element can only contain simple content. That is, it cannot have child elements.
If the content is typed xsd:long
, the reader returns an unboxed 64-bit signed integer. If the content is not typed xsd:long
, the reader attempts to convert it to a 64-bit signed integer according to the rules defined by the W3C XML Schema Part 2: Datatypes recommendation.
For more information, see the Remarks section of the XmlReader reference page.
Applies to
.NET 9 e altre versioni
Prodotto | Versioni |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- XmlReader.cs
- Source:
- XmlReader.cs
- Source:
- XmlReader.cs
Checks that the specified local name and namespace URI matches that of the current element, then reads the current element and returns the contents as a 64-bit signed integer.
public:
virtual long ReadElementContentAsLong(System::String ^ localName, System::String ^ namespaceURI);
public virtual long ReadElementContentAsLong (string localName, string namespaceURI);
abstract member ReadElementContentAsLong : string * string -> int64
override this.ReadElementContentAsLong : string * string -> int64
Public Overridable Function ReadElementContentAsLong (localName As String, namespaceURI As String) As Long
Parameters
- localName
- String
The local name of the element.
- namespaceURI
- String
The namespace URI of the element.
Returns
The element content as a 64-bit signed integer.
Exceptions
The XmlReader is not positioned on an element.
-or-
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."
The current element contains child elements.
-or-
The element content cannot be converted to a 64-bit signed integer.
The method is called with null
arguments.
The specified local name and namespace URI do not match that of the current element being read.
Remarks
This method reads the start tag, the contents of the element, and moves the reader past the end element tag. It expands entities and ignores processing instructions and comments. The element can only contain simple content. That is, it cannot have child elements.
If the content is typed xsd:long
, the reader returns an unboxed 64-bit signed integer. If the content is not typed xsd:long
, the reader attempts to convert it to a 64-bit signed integer according to the rules defined by the W3C XML Schema Part 2: Datatypes recommendation.
For more information, see the Remarks section of the XmlReader reference page.
Applies to
.NET 9 e altre versioni
Prodotto | Versioni |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
Feedback su .NET
.NET è un progetto di open source. Selezionare un collegamento per fornire feedback: