Null vb.net 2010

No the Price property cannot be null - I believe the problem is that SQL Server returns a null value when no rows exist that match the criteria.

SomeItems Where t. Price Is Nothing, 0, Sum t. I will consult the product team to see if they have any ideas about this issue and get back to you as soon as possible. Good day! The content you requested has been removed. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. If both operands have values that are not Nothing , the operation is performed on the underlying values of the operands, as if neither were a nullable value type.

In the following example, variables compare1 and sum1 are implicitly typed. If you rest the mouse pointer over them, you will see that the compiler infers nullable value types for both of them. If one or both operands have a value of Nothing , the result will be Nothing.

A database is one of the most important places to use nullable value types. Not all database objects currently support nullable value types, but the designer-generated table adapters do. See TableAdapter support for nullable types. Skip to main content. This browser is no longer supported.

Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Note Although you can assign Nothing to a variable of a nullable value type, you cannot test it for Nothing by using the equal sign. Download Source Code. Print Source Code. Object, ByVal e As System. EventArgs Handles Button1. How to vb. Mail to : feedback net-informations. All other trademarks are property of their respective owners.

SiteMap Terms About. Tip Variables in VB. NET never have garbage values. In managed code, like the. NET Framework, initial values are 0 or Nothing. NET program that uses module-level field.

Nothing can be used with value types such as Integers. When used on values, "Nothing" indicates the default value for the type. So an Integer assigned to Nothing is zero.

Tip Structures are too a value type. When we assign them to Nothing, we get an empty Structure with no bits set to 1. A string in VB. NET can be assigned to Nothing, which is the same concept as Null. We can test a Nothing String with the String.