Using Variables in XPath Expression

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rustyfancy - 29 Jan 2004 02:59 GMT

I have a textBox that contains a string values. I need to take this
string and use it as criteria for an XPath Expression. Here's what I
have. Why isn't it working???

string s = textBox1.Text;
XPathExpression expr;
expr = myXPathNavigator.Compile("/NewDataSet/note[@to=$s]");

----Matt

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Daniel Cazzulino - 30 Jan 2004 18:36 GMT

You can't retrieve variables values from inside an XPath expression like
that. the $var syntax works for XSLT only, in principle. In order to pass
variables (and at the same time gain a 50% perfm. boost), you can use the
approach explained in this post:

http://weblogs.asp.net/cazzu/archive/2003/10/07/30888.aspx

HTH,

Signature

Daniel Cazzulino
Lagash Systems SA
http://weblogs.asp.net/cazzu

> I have a textBox that contains a string values. I need to take this
> string and use it as criteria for an XPath Expression. Here's what I
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