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Creating Collections of Entity Objects using Reflection - Paul Sheriff's Blog for the Real World

Wed, 06 Mar 2013 23:15:11 GMT

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Join PDSA at DevIntersection Conference - April 8 - 11, 2013 - Paul Sheriff's Blog for the Real World

Mon, 04 Mar 2013 17:30:07 GMT

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Friday Links #244 | Blue Onion Software *

Friday Links #244 | Blue Onion Software * — Fri, 01 Mar 2013 22:35:05 GMT

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Interesting .NET Links - February 27 , 2013 | TechBlog

Interesting .NET Links - February 27 , 2013 | TechBlog — Wed, 27 Feb 2013 11:55:33 GMT

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re: Creating Collections of Entity Objects using LINQ and Field Method

psheriff — Tue, 26 Feb 2013 20:21:08 GMT

Hi MikeC,

Thanks. I don't really use VB so I used a tool to convert from C# to VB. :)

Paul

re: Creating Collections of Entity Objects using LINQ and Field Method

Mike C — Tue, 26 Feb 2013 19:50:17 GMT

In the VB.NET example, you can use the .Field(Of Integer?)() notation instead of the clunkier .Field(Of Nullable(Of Integer))().

re: Building Collections of Entity Classes using a DataReader

psheriff — Mon, 25 Feb 2013 18:44:27 GMT

RichardD,

No other reason than OOPs! :) I was playing around with some different scenarios.

Paul

re: Building Collections of Entity Classes using a DataReader

RichardD — Mon, 25 Feb 2013 18:30:26 GMT

Why have you defined the second argument of your "ConvertTo" method as "object" instead of "T"? If you use the generic parameter, you won't need the cast in the DBNull path, and the compiler should be able to infer the correct type in most cases:

T ConvertTo<T>(object value, T defaultValue)

{

if (Convert.IsDBNull(value)) return defaultValue;

return (T)value;

}

...

ConvertTo(rdr["IntroductionDate"], default(DateTime));

Creating Collections of Entity Objects using LINQ and Field Method - Paul Sheriff's Blog for the Real World

Mon, 25 Feb 2013 17:45:31 GMT

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re: Creating Collections of Entity Objects using LINQ

Andrei — Fri, 22 Feb 2013 14:09:58 GMT

To be honest this isn't exactly under the hood. Using Linq to SQL or Entity Framework would be the way to go for someone who is learning this for the first time.

I think this is still useful tough to show the functionality you can achieve with LINQ.