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Title CBit Function
Description CBit converts anything to an integer that is suitable for use with
MS SQL Server bit fields.

CBit ensures that a 1 or 0 will always be returned by the function,
regardless of the data type or value of the input expression.

CBit returns a 0 or 1 value based on the following criteria (see table).
Criteria is applied in the order stated below. Once any criteria
is recognized by CBit, no other criteria will be checked to determine
the value of the bit field. In other words, CBit goes with the first
criteria that matches and then stops testing the variant input and
returns the results of the first applicable test.


Variant Argument CBit Returns
------------------------------------------------------------------
if variant can be converted to sub-type 1
string and is considered alpha-numeric
and if the value is: "on", "true", "y",
or "t"

if variant can be converted to sub-type 0
string and is considered alpha-numeric
and if the value is: "off", "false", "n",
"f", or ""

if variant can be converted to a long 1
value and is greater than 0

if variant can be converted to a long 0
value and is less than 0

if variant is numeric but raises an error 0
when being converted to long

if variant is null, empty or an array 0

if variant is an object and is set to 1
anything other than Nothing

if variant is an object and is set to 0
Nothing

if data type or value of passed variant 0
argument is not given a value based on
the above criteria



If CBit cannot determine the bit status of a particular variant entry,
CBit always returns 0.
Category ASP » Math
Hits 4200
Code Select and Copy the Code
<% Private Function CBit(ByVal variantIn) Dim re, bTest, bOut bOut = Null On Error Resume Next Set re = New RegExp With re .Global = False .IgnoreCase = True .Pattern = "^([A-Z-_d]+)$" bTest = .test(variantIn) End With Set re = Nothing If Err Then bTest = False On Error GoTo 0 If IsNull(bOut) And bTest Then 'alpha-numeric Select Case CStr(LCase(Trim(variantIn))) Case "on", "true", "y", "t" bOut = 1 Case "off", "false", "n", "f", "" bOut = 0 End Select End If If IsNull(bOut) And IsNumeric(variantIn) Then On Error Resume Next variantIn = CLng(variantIn) If Err Then bOut = 0 Else If variantIn > 0 Then _ bOut = 1 Else bOut = 0 End If On Error GoTo 0 End If If IsNull(bOut) And (IsNull(variantIn) Or _ IsEmpty(variantIn) Or IsArray(variantIn)) Then bOut = 0 If IsNull(bOut) And IsObject(variantIn) Then If variantIn Is Nothing Then _ bOut = 0 Else bOut = 1 End If If IsNull(bOut) Then bOut = 0 CBit = bOut End Function %>

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