Weird result comparing property values using reflection

Posted by Brian on Stack Overflow See other posts from Stack Overflow or by Brian
Published on 2009-09-16T20:42:10Z Indexed on 2010/05/27 0:21 UTC
Read the original article Hit count: 471

Filed under:

comparison

|

property

Can someone explain why this is occurring? The code below was executed in the immediate window in vs2008. The prop is an Int32 property (id column) on an object created by the entity framework.

The objects entity and defaultEntity were created using Activator.CreateInstance();

Convert.ChangeType(prop.GetValue(entity, null), prop.PropertyType) 0 Convert.ChangeType(prop.GetValue(defaultEntity, null), prop.PropertyType) 0 Convert.ChangeType(prop.GetValue(entity, null), prop.PropertyType) == Convert.ChangeType(prop.GetValue(defaultEntity, null), prop.PropertyType) false

© Stack Overflow or respective owner

Related posts about comparison

Store comparison in variable (or execute comparison when it's given as an string)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello everyone. I'd like to know if the super-powerful python allows to store a comparison in a variable or, if not, if it's possible calling/executing a comparison when given as an string ("==" or "!=") I want to allow the users of my program the chance of giving a comparison in an string. For… >>> More
On StringComparison Values

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
When you use the .NET Framework’s String.Equals and String.Compare methods do you use an overloStringComparison enumeration value? If not, you should be because the value provided for that StringComparison argument can have a big impact on the results of your string comparison. The StringComparison… >>> More
Use Comparison Operators in SQL to Remove/Return Columns with Null Values

as seen on Internet.com - Search for 'Internet.com'
When you use the comparison operators in SQL with the Where clause, you can remove the columns with null values. >>> More
Use Comparison Operators in SQL to Remove/Return Columns with Null Values

as seen on Internet.com - Search for 'Internet.com'
When you use the comparison operators in SQL with the Where clause, you can remove the columns with null values. >>> More
Building a Web Form in ASP.NET and PHP: a Comparison

as seen on ASP Free - Search for 'ASP Free'
While there are important differences between PHP and ASP.NET both are used to build websites. Because of this both need to enable developers to build web forms among other tasks. This article compares building a web form in PHP with building the same form in ASP.NET to help those familiar with… >>> More

Related posts about property

Python Glade could not create GladeXML Object

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey, I've created a simple window GUI in Glade 3.6.7 and I am trying to import it into Python. Every time I try to do so I get the following error: (queryrelevanceevaluation.py:8804): libglade-WARNING **: Expected <glade-interface>. Got <interface>. (queryrelevanceevaluation.py:8804):… >>> More
Segmentation fault when running a python script/GTKBuilder app?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to learn GUI programming using python2 and GTKBuilder, but I get a segmentation fault when I run the code. This is my file, created in Glade as a GTKBuilder file: <?xml version="1.0" encoding="UTF-8"?> <interface>  <object class="GtkWindow"… >>> More
Assigning property to JS object using another objects property value as the property name

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey guys, I want to use the value of an objects property to name the property of another object. Easy to do in PHP: $object1->property = 'name'; $object2->{$object1->property} = "value"; echo $object2->name; //outputs "value" But in Javascript I can't figure out how to do this. The… >>> More
Demystifying Silverlight Dependency Properties

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
I have the opportunity to teach a lot of people about Silverlight (amongst other technologies) and one of the topics that definitely confuses people initially is the concept of dependency properties. I confess that when I first heard about them my initial thought was “Why do we need a specialized… >>> More
Sharepoint Error: [COMException (0x80004005): Cannot complete this action.

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I've created a site basic definition that uses different master and default pages. Everything works quite well except for whenever I create a new site based on the definition I receive the following error when browsing to the new site: [COMException (0x80004005): Cannot complete this action… >>> More