XmlReader.ReadContentAsBoolean Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Reads the text content at the current position as a Boolean.
Namespace: System.Xml
Assembly: System.Xml (in System.Xml.dll)
Syntax
'Declaration
Public Overridable Function ReadContentAsBoolean As Boolean
public virtual bool ReadContentAsBoolean()
Return Value
Type: System.Boolean
The text content as a Boolean object.
Exceptions
| Exception | Condition |
|---|---|
| InvalidCastException | The attempted cast is not valid. |
| FormatException | The string format is not valid. |
Remarks
This method concatenates text, white space, significant white space, and CDATA sections, and skips any comments or processing instructions. Entity references are automatically resolved.
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. |
Examples
Dim output As New StringBuilder()
Dim xmlString As String = _
"<root>" & _
"<item sale-item='true' productID='123456' colors='blue green black'>" & _
"<price>9.95</price>" & _
"</item>" & _
"<item sale-item='false' productID='124390'>" & _
"<price>5.95</price>" & _
"</item>" & _
"<item sale-item='true' productID='53298'>" & _
"<price>12.95</price>" & _
"</item>" & _
"</root>"
Using reader As XmlReader = XmlReader.Create(New StringReader(xmlString))
reader.ReadToDescendant("item")
Do
reader.MoveToAttribute("sale-item")
Dim onSale As Boolean = reader.ReadContentAsBoolean()
If onSale Then
output.AppendLine(reader("productID"))
End If
Loop While reader.ReadToNextSibling("item")
OutputTextBlock.Text = output.ToString()
End Using
StringBuilder output = new StringBuilder();
String xmlString =
@"<root>
<item sale-item='true' productID='123456' colors='blue green black'>
<price>9.95</price>
</item>
<item sale-item='false' productID='124390'>
<price>5.95</price>
</item>
<item sale-item='true' productID='53298'>
<price>12.95</price>
</item>
</root>";
using (XmlReader reader = XmlReader.Create(new StringReader(xmlString)))
{
reader.ReadToDescendant("item");
do
{
reader.MoveToAttribute("sale-item");
Boolean onSale = reader.ReadContentAsBoolean();
if (onSale)
{
output.AppendLine(reader["productID"]);
}
} while (reader.ReadToNextSibling("item"));
}
OutputTextBlock.Text = output.ToString();
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
See Also