Xpath query issue using Objective C

Question

I want to extract the links from this HTML file using Objective-C.

<html>
 <head>
  <base href='http://example.com/' />
  <title>Example website</title>
 </head>
 <body>
  <div id='images'>
   <a href='image1.html'>Name: My image 1 <br /><img src='image1_thumb.jpg' /></a>
   <a href='image2.html'>Name: My image 2 <br /><img src='image2_thumb.jpg' /></a>
   <a href='image3.html'>Name: My image 3 <br /><img src='image3_thumb.jpg' /></a>
   <a href='image4.html'>Name: My image 4 <br /><img src='image4_thumb.jpg' /></a>
   <a href='image5.html'>Name: My image 5 <br /><img src='image5_thumb.jpg' /></a>
  </div>
 </body>
</html>

HEre is the Xpath Query:

//a[contains(@href, "image")]/@href

But the problem here is that it errors on Quotation marks around image text in query!

Error

jtbandes · Accepted Answer · 2011-08-06 07:09:48Z

2

You'll have to escape the double quotes to use them inside a quoted string:

@"//a[contains(@href,\"image\")]/@href"

Or use single quotes, if XPath supports that:

@"//a[contains(@href,'image')]/@href"

answered Aug 6, 2011 at 7:09

jtbandes

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2 Comments

saleh Hosseinkahni Over a year ago

I TRIED YOUR both queries! it runs without error now, but it does not return the result, it return null!

jtbandes Over a year ago

How so? Does it say (null)? I don't know enough about XPath to verify your query.

Frédéric Hamidi · Accepted Answer · 2011-08-06 07:08:00Z

1

Since the XPath expression is delimited by double quote characters, you cannot use these characters inside of it. You'll have to switch to single quotes instead:

//a[contains(@href, 'image')]/@href

answered Aug 6, 2011 at 7:08

Frédéric Hamidi

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1 Comment

saleh Hosseinkahni Over a year ago

I TRIED YOUR both queries! it runs without error now, but it does not return the result, it return null!

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