In the Microsoft .NET Framework, you can use enum types for flags by using the
class. If you use the enum type in ASP.NET controls, and the Flags
property is set to a simple tag (for example, Flags="Flag1"
), the application works as expected.
However, if the Flags
property is set to a bit combination, as in the following example, the result is a NullReferenceException error:
<i:SimpleControl runat="server" id="SimpleControl1" Flags="Flag1, Flag2" />
If you do not have many flag combinations, you can use the
following enum declaration to work around the problem:
public enum MyFlags
Flag1 = 1,
Flag2 = 2,
Flag1And2 = Flag1|Flag2,
Flag3 = 4
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note
In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone
tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
01-Aug-2003 19:47 1.1.4322.930 253,952 Aspnet_isapi.dll
01-Aug-2003 19:47 1.1.4322.930 20,480 Aspnet_regiis.exe
01-Aug-2003 19:47 1.1.4322.930 32,768 Aspnet_wp.exe
16-May-2003 01:49 33,522 Installpersistsqlstate.sql
16-May-2003 01:49 34,150 Installsqlstate.sql
01-Aug-2003 19:38 1.1.4322.930 94,208 Perfcounter.dll
01-Aug-2003 19:55 1.1.4322.930 1,216,512 System.dll
01-Aug-2003 19:38 1.1.4322.930 323,584 System.runtime.remoting.dll
01-Aug-2003 19:56 1.1.4322.930 1,253,376 System.web.dll
01-Aug-2003 19:49 1.1.4322.930 819,200 System.web.mobile.dll
01-Aug-2003 19:49 1.1.4322.930 569,344 System.web.services.dll
01-Aug-2003 19:56 1.1.4322.930 1,335,296 System.xml.dll
01-Aug-2003 19:42 14,472 Webuivalidation.js
has confirmed that this is a problem in the Microsoft products that are listed
at the beginning of this article.
Article ID: 825082 - Last Review: October 25, 2005 - Revision: 1.4
- Microsoft .NET Framework 1.1
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