Don't forget to type your variable:
String param = request.getParameter( "myparam");
I just ran this and it performs as Tim suggests.
Mark
-----Original Message-----
From: Chen,Gin
Sent: Friday, December 14, 2001 12:56 PM
depending on where ur getting the param:
request.getParameter("param_name") will return null only in the 2nd case.
it will return an empty String in the first case.
verify it urself with this page
<html>
<head></head>
<body>
<% param = request.getParameter("myparam"); %>
My Param: <%= param==null?"null value":param.equals("")?"empty
string":param %>
<form action="testinclude.jsp" method="post">
<input type="Text" name="myparam"><input type="Submit"
value="Submit">
</form>
</body>
</html>
So unless ur doing something different.. in which case.. u need to give more
info.
-Tim
-----Original Message-----
From: Ali Chadorbaf [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 14, 2001 12:26 PM
To: [EMAIL PROTECTED]
Subject: request.getParameter() question
value=request.getParameter("param_name");
The above statement in called page will return null in
two cases:
1-when the "param_name" is passed with no value
2-when the "param_name" didn't pass at all.
How can I differentiate these two. I mean I need to
somehow know whether
Parameter did not pass or passed with no value.
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