How to check is null value in the table?
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23-08-2019 - |
Question
USING MS ACCESS 2003
How to check is null value in the access database?
My code.
Public Function DateToString(dte As Date) As String
Dim d As String
Dim m As String
Dim y As String
d = Day(dte)
m = Month(dte)
y = Year(dte)
If Len(d) = 1 Then d = "0" & d
If Len(m) = 1 Then m = "0" & m
DateToString = y & m & d
End Function
Public Function StringToDate(txt As String) As Date
Dim dte As String
dte = Left(txt, 4) & "-" & Mid(txt, 5, 2) & "-" & Right(txt, 2)
StringToDate = CDate(dte)
End Function
sql1 = "CREATE TABLE MOI (PreDate varchar(50))"
sql2 = "INSERT INTO MOI values('" & StringToDate(rsCardEvent1.Fields("PreDate")) "')"
From the above function, I want to check if not null then my code else no need.
Need VB 6.0 Code Help?
Solution
To check for Null in a dataset field:
If IsNull(rs("colname")) Then
'Field contains a Null Value
Else
'Field does 'not' contain a Null Value
End If
To check for null or Empty string:
If (txt & "") = "" Then
' txt is Null or empty
End If
OTHER TIPS
If the item is actually coming is as a string, then do:
if not txt is vbNullString then
' code here
end if
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