How do I use vbNullString?
You typically use vbNullString in place of an empty string “” literal, to spare uselessly allocating 6 bytes (4 for the string pointer, 2 for the null character), and to make your code unambiguously clear about your intent (e.g. “I mean an empty string, this wasn’t a typo”), similar to how you would use string.
What does vbNullString mean?
vbNullString is a special VB constant that denotes a null string. The “” literal is an empty string. There’s an important difference. An empty string is a real string.
How do you check if a string is null in VB?
What if strTest is nothing? IsNullOrEmpty explicitly contains a check whether strTest is nothing . Your statement does not check this. Actually it does, string comparison against an empty string will return true for Nothing too in VB.
What is vbNullString vb net?
vbNullString is a constant, more likely out of VB6, String. Empty and “” are the same, some say that there is a performance difference, but that is not true, it is your choice what you use. To check whether a string is empty you can use If String. IsNullOrEmpty(String) .
What is the value of vbNull?
Provides a constant for the Null data type for the VarType method. The constant belongs to the VBS functionality. You do not need to specify this object. vbNull has the value 1.
Is string empty VB?
The empty string has length of zero but is not null. Empty. An empty string has length 0.
Is empty string null?
An empty string is a string instance of zero length, whereas a null string has no value at all. An empty string is represented as “” . It is a character sequence of zero characters. A null string is represented by null .
Is nothing Visual Basic?
For strings in Visual Basic, the empty string equals Nothing . Therefore, “” = Nothing is true. If you declare a variable without using an As clause and set it to Nothing , the variable has a type of Object . An example of this is Dim something = Nothing .
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