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How to specify a DefaultExpression for a TField object

 

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If you set up a field attribute set and associate that set with a field in your table that will
work. If you set the value in the object inspector it will let you enter in a string but it will not
reflect the value at runtime. If you try to set the TField.DefaultExpression property at
runtime like this:

MyField.DefaultExpression := 'MyValue';  // (Wrong)
It will compile but you will not get a default value at runtime when you create a new record
in the table by, say, clicking on the + on the DBNavigator. To get the default value to take
at runtime the code assignment needs to be:

MyField.DefaultExpression := '''MyValue'''; // (Correct)
In the Object Inspector you just need to put 'MyValue'. Use single quotes in the Object
Inspector.

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Comments:

2005-12-12, 02:11:54
anonymous from Saudi Arabia  
Not Worh!!!!!!!!!!!!!!!!!!!!!!
2005-12-18, 02:16:52
AM from Saudi Arabia  
Not Work? Check Frist!!!!!!!!!!!!!
2009-09-17, 05:58:39
anonymous from Romania  
I have a big problem when assigning DefaultExpression to a field that contains spaces(i.e the field name has spaces like 'cust no').is there a workaround .thnx
2009-10-29, 03:42:44
anonymous  
It work only for BDE!

 

 

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