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Asked: 2026-06-04T16:44:28+00:00

I have never done anything with LINQ before, however I have experience with MySQL.

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I have never done anything with LINQ before, however I have experience with MySQL.

I am on page 232 of Microsoft® ASP.NET 4 Step by Step and the book has started to talk about LINQ which is cool.

The book has instructed my to type my first LINQ query which I have, however it has resulted in 19 errors from Visual Studio, because the where, orderby and select commands are not recognised.

Below is the code from the book:

bookcode

Below is my code (in the form of a screenshot so you can see what Visual Studio doesn’t like):

mycode

What am I doing wrong?

Thankyou

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1 Answer

  1. Editorial Team

    In your Linq query, the TechnologyDescriptor tag wih the “<>” is barfing. What you need to do is specify a named variable instance for an individual item in the technologyDescriptor list. For example:

    GridView1.DataSource = from td in technologyDescriptor where td.TechnologyName.Contains(".Net") == true order by td.TechologyName.Length
select td.TechnologyName.ToUpper();

    You can think of this query as similar to a foreach loop that is looping over technologyDesciptor list and “td” being the individual record for each loop

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