StackOverflow2013

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11869186
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2012-08-08T16:41:15.927
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2012-08-08T16:41:15.927
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The .Net Framework exposes a lot of awesome extension methods, like Sum, Average, etc... <a href="http://msdn.microsoft.com/en-us/library/bb341635" rel="nofollow">http://msdn.microsoft.com/en-us/library/bb341635</a> Example: <pre><code>class Program { static void Main(string[] args) { var sweetList = new List<int> { 4, 123, 5, 23, 42 }; Console.WriteLine("Average: {0}", sweetList.Average()); Console.WriteLine("Sum: {0}", sweetList.Sum()); var listOfCoolObjects = new List<CoolObject>(); listOfCoolObjects.Add(new CoolObject { Name = "1434", NeatValue = 42 }); listOfCoolObjects.Add(new CoolObject { Name = "asdf", NeatValue = 5 }); listOfCoolObjects.Add(new CoolObject { Name = "fgsdfg", NeatValue = 99 }); listOfCoolObjects.Add(new CoolObject { Name = "qwerty", NeatValue = 1345 }); listOfCoolObjects.Add(new CoolObject { Name = "casc", NeatValue = 111 }); Console.WriteLine("Average: {0}", listOfCoolObjects.Average(x => x.NeatValue)); Console.WriteLine("Sum: {0}", listOfCoolObjects.Sum(x => x.NeatValue)); } } class CoolObject { public string Name { get; set; } public int NeatValue { get; set; } } </code></pre> In your code, you could do something like this: <pre><code>var sum = (From fdi In db.FoodDiaryItems Where fdi.PersonID = CurrentSiteUser.PersonID And fdi.EntryDate = CurrentDiaryDate).Sum(fdi => fdi.SomeValueYouWantToSum) </code></pre> I know you're coding in VB, but I don't know VB at all, so excuse any syntax errors in that last code chunk.
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1. POlinq to entity framework custom collection class that inherits list(Of T)
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1. COsorry I should have been more specific with my property needs, they are more complex then just sum, average, etc. Was just using that as an example. Check original post for updated needs.
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