Vb check for null value

Do you know why that doesn't work? If not, what are the values of e. What I meant was, can you debug the emptycell. BTW: they will be zero indexed integers. Richard Deeming Jun am. Value is Nothing , then. ToString will throw a NullReferenceException. Value is not Nothing , then.

Length will return an Integer. An Integer will never be equal to Nothing. Accept Solution Reject Solution. I think your If statement should look like this. It sets the lblKET to visible if the cell is Null or contains only spaces or an empty string. Posted Jun am Mike Meinz. Akbar Giffary Jun pm. Mike Meinz Jun am. If you want to select based on empty row, then you have to check each cell in that row. To do that, you iterate through all of the columns in that row and if they all satisfy the conditions in my sample code, then the row is "empty.

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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. 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. The below code is the demonstration code for you. Now check whether the empty value is NULL or not. Below code is to test whether the empty string is NULL or not.

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