Arnold Matusz's Blog

The scenario: I’ve been using Visual Web Developer 2008 for a web application and after I moved the application from the inbuilt ASP.NET Development Server to IIS I encountered the following exception message:

Failed to map the path '/App_GlobalResources/'

There are a few blog posts out there which may apply to your case, especially if you have Crystal Reports 8 installed. Worth mentioning is: www.thejoyofcode.com. If your situation is proior to Visual Studio 2008 you might find your solution immediately in the blog content, but if the concern is a bit newer reading through each comment might be helpfull. » Continue reading ...

LINQ to Entities does not recognize the method 'Int32 ToInt32(System.String)' method, and this method cannot be translated into a store expression.

This is a shortcomming of LINQ to Entities, and indeed the ADO.NET Entity Framework at the current release! The reason for a similar exception message is that in queries on the Entity Framework, custom methods and extensions methods cannot be translated into store expressions.

There are workarounds to still enjoy LINQ to Entities and as an example please read the following: » Continue reading ...

Although the ModalPopupExtender isn’t new at all there are still countless poeple who search the web for a comprehensive sample on how a ModalPopupExtender is used from a GridView.

First of all you’ld need to have a Button in each row which should trigger the ModalPopupExtender, then you would need to have an instance of a ModalPopupExtender with the TargetControlID set to the ID of that Button. » Continue reading ...

LINQ to SQL may be dying these days, and to be frank that’s not a big deal as the Entity Framework is out which will 100% replace it. But LINQ as a concept is something new and won’t be out for some time!

While doing some configuration work I got into a sitation where I needed to query an XML file. Immediately my thoughts went to LINQ, and in term LINQ to XML. It is a great addition to the LINQ family but in terms of readability it’s far cry away from the old days when XPath was in use. » Continue reading ...

Most people think that by calling OrderBy().OrderBy() will solves the problem of ordering a sequence by multiple fields. Well I'm dissapointed to announce this is not true because the second call overwrites the ordering clause specified in the first one!

First of all lets analyze the architecture of a LINQ ObjectQuery. The important peice is what it actually returns, namely: an IQueriable object! This IQueriable interface implements the IEnumarble interface which we are normally used to use when creating an ObjectQuery. » Continue reading ...