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ASP FAQ Tutorials :: Classic ASP 1.0 :: General Topics :: Can I have optional parameters to my subs / functions?
Can I have optional parameters to my subs / functions?
Unlike VB, VBScript does not support the OPTIONAL keyword, so you cannot set up a function to conditionally accept parameters. There are some kludges though, such as:
- pass in a delimited string, with required parameters first, e.g.:
<%
function test(foobar)
foos = split(foobar,",")
response.write foos(0)
if ubound(foos)>0 then response.write foos(1)
end function
test("1,2")
test("1")
%> - pass in empty strings or other token values that tell the sub or function to ignore that value, e.g.:
<%
function test(foo,bar)
response.write foo
if bar <> "" then response.write bar
end function
test("1","2")
test("1","")
%>
| <script language=JScript RUNAT=SERVER> function test(foo,bar) { Response.Write(foo); Response.Write(bar); } test('1','2'); test('1'); </script> |
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