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BOOK: ASP.NET 3.5 Enterprise Application Development with Visual Studio 2008: Problem Design Solutio
This is the forum to discuss the Wrox book ASP.NET 3.5 Enterprise Application Development with Visual Studio 2008: Problem Design Solution by Vincent Varallo; ISBN: 9780470396865
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Old August 31st, 2009, 01:24 PM
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Default Cast Problem With Select Technique in Chapter 2

Hi there,

I am pulling my hair out a result of what I sure is a simple issue.

In trying to implement the Select(ID) in the DAL technique in Chapters 2 and 3, I continue to receive am InvalidCastException error on returning the result from the LINQ query to the database object. I need help with the Cast or another technique. Is there a simple method to convert the iQueryable result to the TEntity object? Is this even the issue?

 public override Application Select(string name)
 using (fvLINQToSQLDataContext db = new fvLINQToSQLDataContext(DBHelper.GetForecastVelocityConnectionString()))
   ISingleResult<Application> app = db.Applications_GetByName(name);
   return app.Single();
Where Application is the name of the Data Class created when I added a table from my database to the Designer face.


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