Vb if is null

VB Check if int is empty Ask Question. Asked 11 years, 1 month ago. Active 5 years, 1 month ago. Viewed 56k times. Is there any function? Unfortunately, for the simplest questions, there are no answers on google.

Improve this question. Mark Schultheiss Add a comment. Active Oldest Votes. Show "You haven't specified a second favorite number! Improve this answer. Just a side note: actually you can assign Nothing to a value type in VB. But in that case, Nothing does not mean 'null' but 'default T ', so for integers it's the same as 0.

Notice that I said they can't be set to Nothing as you could with a reference type. Setting a value type to Nothing will cause it to be initialized back to its default type.

The point is that there is no such null or "empty" state for value types; they always contain a value. CDspace 2, 17 17 gold badges 32 32 silver badges 36 36 bronze badges.

Nothing details. We assign to Nothing, test against it, and ponder nothingness. A NullReferenceException is caused by accessing something on a Nothing value. First example. This program assigns a String variable to Nothing. This is not an empty string. It is a String object that does not exist. We compare it to Nothing in an If-statement.

Part 1 We use the "Is" operator for testing references against Nothing. Part 2 We use the IsNothing function to see if a reference is equal to Nothing. This is another syntax form for the same thing. This exception not NothingReferenceException is provoked by accessing a member on Nothing.

If a reference may be Nothing, we must test before using its members. When a Module or Class is created, the fields within it are automatically set to Nothing. You never need to assign them to Nothing at creation time. Tip Variables in VB. NET never have garbage values. In managed code, like the. Forgot Password? Free Excel Course. Login details for this Free course will be emailed to you.

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