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ADO.NET :: Null Value Cannot Be Assigned To A Member With Type System?


I am getting an exceptionon a linq to sqlquery:The null value cannot be assigned to a member with type System.DateTime which is a non-nullable value type.

[Code]...


View 3 Replies (Posted: Dec 22, 2010 03:09 PM)

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I am making a website to store invoices so i can mail them to clients. So i got a table for clients, invoices and one with invoice products/services. When an invoice has no products/services added to them and it returns null i get the error "the null value cannot be assigned to a member with type System.Decimal which is a non-nullable value type."

I just started with linq. Before i always used mysql. Mostly i just had to call data from 1 table so forgive me if my linq query isn't really correct.

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"

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When i click on the page that represents a controller the following error was displayed:-

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On this link of code

var articleapproval = articletyperepository.FindAllArticlesRequireMyApproval().ToList();
while the FindAllArticlesRequireMyApproval execute the following LINQ statement :-
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My code:

[Code]....

If the value is null writes out that error.How to check if the value is null? And if the value is null, I want to store + 1

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I have a problem:-
After learning linq.
I thought about testing it..
I have a table with the following fields.
name[..varcher(50)..notnull]
title[..varchar(50)..notnull]
id[..primary key..increment +1..int]

I have a linq to sql classes named dataclasses.dbml

here is my query

Dim db As New DataClassesDataContext
Dim p As New testing With {.name = "ad", .title = "adi"}
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Here is my error..It crashes on db.SubmitChanges()
With this error...

The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type.

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below is the code:[Code]....

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