how to cast class property

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Hello,

I have code like below.

C#

var ds = from DataRowView rowView in view
                                               select new CM.Models.ClassName
                                               {
                                                   Note = rowView["Type"].ToString(),

                                               };

method.Welcome((ClassName)ds).Process();

When i cast like this it will give me below error.

Unable to cast object of type 'WhereSelectEnumerableIterator`2[System.Data.DataRowView,ClassName ClassName

Can any one help me on this?

Regards,
Viprat

Posted 10-Nov-14 2:50am

viprat

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Comments

[no name] 10-Nov-14 8:56am

Try with adding .ToList().
I think here ds would give a list of objects.

viprat 10-Nov-14 8:58am

no that is given only one object.

[no name] 10-Nov-14 9:00am

Can you just tell me briefly what exactly you want from this LINQ?
What is the scenario?

Sergey Alexandrovich Kryukov 10-Nov-14 9:00am

First of all: if a compiler tells you "unable to cast", who told you that your next task is to cast it?
—SA

viprat 10-Nov-14 9:08am

its compile successfull but once i run i will get above error.

Sergey Alexandrovich Kryukov 10-Nov-14 11:28am

No. When it did not compile, it wasn't "it". It was different code. Programming is not magic.
—SA

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OriginalGriff · Accepted Answer · 2014-11-10T03:11:00

The Linq query returns an IEnumerable of your class - and you can;t cast that to a single value any more than you can use an array of integers tin a simple arithmetic operation:

C#

int[] ar = GetInts();
int x = ar + 6;

Instead, either return a single item using FirstOrDefult, or check the count and fetch the first member of the collection to pass to your method. Neither way will need casting as the Linq query specifically returns a collection of a named type.

how to cast class property

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how to cast class property

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