BUG: Your application may stop responding when you use the XmlReader.ReadToNextSibling method in Visual Studio 2005 (906724)
The information in this article applies to:
- Microsoft Visual Studio 2005 Standard Edition
- Microsoft Visual Studio 2005 Professional Edition
- Microsoft Visual Studio 2005 Express Edition
Bug #: 402878 (SQLBUDT)
SYMPTOMSConsider the following scenario. In Microsoft Visual Studio 2005, you use the XmlReader.ReadToNextSibling method in the System.Xml namespace to advance the XmlReader
object to the next sibling element. The value of the ReadState property of the XmlReader object is ReadState.Initial (ReadState Enumeration). In this scenario, an internal infinite loop may occur, and your application may stop responding (hang).CAUSEThe XmlReader.ReadToNextSibling method is a virtual method on the XmlReader base class. This
issue may occur on all XmlReader-based objects that do not override this
method. These objects include the XmlTextReader object, the XmlNodeReader object, and the objects that are returned
by the XmlReader.Create method.
An XmlReader object is in initial state right
after the object has been created and before the Read method is called for the first time.
In this scenario, the ReadState property on the XmlReader object is set to ReadState.Initial.WORKAROUNDTo work around this issue, you must run the Read method of
the XmlReader object before you use the XmlReader.ReadToNextSibling method. This operation can move the XmlReader object out of the
initial state. The following helper function provides a functional
replacement for the XmlReader.ReadToNextSibling method. You can work around the issue by using a function
that is similar to the function in the following code sample.
public static bool ReadToNextSibling( XmlReader r, string name ) {
if ( r.ReadState == ReadState.Initial ) {
r.Read();
if ( r.IsStartElement( name ) ) {
return true;
}
}
return r.ReadToNextSibling( name );
}
STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are
listed in the "Applies to" section.
| Modification Type: | Major | Last Reviewed: | 11/14/2005 |
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| Keywords: | kbpending kbbug KB906724 kbAudDeveloper |
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