Not null in vb 6

Viewed 4k times. Thomas G 9, 7 7 gold badges 27 27 silver badges 39 39 bronze badges. I would normally use If Not String. IsNullOrEmpty textbox1. Text Then - In what ways did your previous efforts fail? SteGriffiths thank you it worked.

I tried the code which I have mentioned in the question but it keep on putting the null values in database. Your code helped me out. Add a comment. Active Oldest Votes. It is also not the same as a zero-length string "" , which is sometimes referred to as a null string. Use the IsNull function to determine whether an expression contains a Null value.

This is because any expression containing a Null is itself Null and therefore False. This example uses the IsNull function to determine if a variable contains a Null. Have questions or feedback about Office VBA or this documentation?

Another use for null-conditional member access is to invoke delegates in a thread-safe way with much less code. The following example defines two types, a NewsBroadcaster and a NewsReceiver. News items are sent to the receiver by the NewsBroadcaster. SendNews delegate. Before null conditional operators, code like the following ensured that the delegate invocation list was not Nothing :.

The new way is thread-safe because the compiler generates code to evaluate SendNews one time only, keeping the result in a temporary variable. Filtering Arrays. Save File To Database. Extract File From Database. Extract picture from database without using hard drive. Change Menu BackColor. How to use MS Flexgrid. Make Frame Transparent.

How to comment blocks of code in VB5 and VB6.