Unexpected type problem
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- Subject: Unexpected type problem
- From: Paul Wilson <paul@...>
- Date: 2005年11月17日 10:38:37 -0700
I am new to Lua and I have run into something I do not know how to
handle. I am converting some VB.NET code to Lua to run in a Luanet (Lua
5.0.2) environment. The code fragment below is supposed to take an XML
document contained in a string and extract the inner text value for the
XML tag <MessageContent> which is then to be analysed. In the VB case
the result of accessing the InnerText property of a node returns a
string. However, when the code containing the fragment below is run,
the string.find call causes an exception, the description of which
indicates that the first parameter (messageContents) is a table and not
a string. Can someone tell me what I am doing wrong please.
Thanks,
Paul Wilson
(paul@paulwilsonconsulting.com)
Code Fragment:
-- Extract the message contents
xmlDocument = luanet.import_type("System.Xml.XmlDocument");
local document = xmlDocument();
document:LoadXml(myMessage);
-- Attempt to get the message content string
local nodes = document:GetElementsByTagName("MessageContent");
local messageContents = "";
if nodes.Count == 0 then
.
.
.
elseif nodes.Count > 1 then
.
.
.
else
-- Save the message contents
messageContents = nodes[0].InnerText;
end
-- Look for multiple messages
index = string.find(messageContents, ">");
begin:vcard
fn:Paul Wilson
n:Wilson;Paul
org:Paul Wilson Consulting
adr:;;P.O. Box 87;Seba Beach;Alberta;T0E 2B0;Canada
email;internet:paul@paulwilsonconsulting.com
title:Senior Consultant
tel;work:+1.780.951.3521
tel;fax:+1.928.396.4532
tel;home:+1.780.797.4214
tel;cell:+1.780.951.3521
url:http://www.paulwilsonconsulting.com
version:2.1
end:vcard