NULL data in Delphi 7 [closed]

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#1 by (1 votes)
#2 by (0 votes)

1

If the text of an edit is Null show message so that the required data is filled otherwise run the code. That's what I need.

delphi

asked by Will 24.05.2016 в 04:59

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2 answers

Query linq, matching properties error with scripts

score 1 · Answer 1

You have to verify that the text of your edit is not empty to execute the code. Otherwise, display a message for the user to fill in the data:

if Trim(edt1.Text) <> '' then
  // tu codigo
else
    showmessage('Por favor introduzca un valor');

score 0 · Answer 2

If it is a TEdit, Javier's answer is correct, but if you talk null you must be referring to a DBedit linked to data from a TDataSet.

if not VarIsNull(DataSet[FieldName]) then
  // tu codigo
else
    showmessage('Por favor introduzca un valor');