XSLT paging XML data and sorting by a specific value

The last time we met this requirement, the data in the XML file is converted to HTML through XSLT for paging, and the data needs to be re-ordered based on the user's selection according to a certain field. the following method was initially thought: <? XML version = "1.0" encoding = "iso-8859-1"?>
<XSL: stylesheet version = "1.0" xmlns: XSL = "http://www.w3.org/1999/XSL/Transform"
Xmlns: msxsl = "urn: Schemas-Microsoft-com: XSLT" xmlns: User = "http://dotnet.aspx.cc /"
Exclude-result-prefixes = "msxsl user">
<XSL: output method = "html" omit-XML-declaration = "yes"/>

<XSL: template match = "/">
<XSL: For-each select = "// items/item [(position () & lt; = $ pageno * $ count) and (
Position () & gt; (number ($ pageno)-1) * $ count)] ">
<XSL: sort order = "ASCENDING" data-type = "text" select = "title"/>
</XSL: For-each>
</XSL: Template>

</XSL: stylesheet>

When you need to re-sort by a field, use JavaScript to modify the select attribute value in the XSL: Sort element. but soon I found the problem: this is just to re-sort the data on the current page, and not really re-Sort all the data in XML according to the required fields.
But in the end, I didn't always think of a good solution to solve the problem. I had to use the so-called "data island" (I don't know if the term is correct), that is, I used XSLT to sort the XML before generating XML, in the web page, and then perform paging operations. when you need to re-sort the data, you can sort the data first and then page by page. If you do not need to re-sort the data, you can directly retrieve the data from the current table. I have always felt that this method is very uncomfortable. It takes two XSLT segments to solve this problem.

Finally, in the process of using XSLT, I thought that only one piece of XSLT was used to solve the problem of data re-sorting during paging. The code is roughly as follows: <? XML version = "1.0" encoding = "iso-8859-1"?>
<XSL: stylesheet version = "1.0" xmlns: XSL = "http://www.w3.org/1999/XSL/Transform" xmlns: msxsl = "urn: Schemas-Microsoft-com: XSLT" xmlns: user = "http://dotnet.aspx.cc/" exclude-result-prefixes = "msxsl user">
<XSL: output method = "html" omit-XML-declaration = "yes"/>

<XSL: template match = "/">
<XSL: For-each select = "// items/item">
<XSL: If test = "(position () & lt; = $ pageno * $ count) and (position () & gt; (number ($ pageno)-1) * $ count) ">
<XSL: variable name = "I" select = "position ()"/>
<XSL: For-each select = "// items/item">
<XSL: Sort select = "price" data-type = "Number"/>
<XSL: If test = "(position () = $ I)">

</XSL: If>
</XSL: For-each>
</XSL: If>
</XSL: If>
</XSL: Template>

</XSL: stylesheet>

The efficiency may not be very good. Please give me more advice.
Pageno indicates the current page number; count indicates the number of records on each page. The following is an XML file. <? XML version = "1.0"?>
<Items>
<Item>
<Author> ZK </author>
<Title> yname of TTT </title>
<Price> 1.3 </price>
</Item>
<Item>
<Author> ZK </author>
<Title> aname of TTT </title>
<Price> 3.3 </price>
</Item>
<Item>
<Author> ZK </author>
<Title> xname of TTT </title>
<Price> 2.3 </price>
</Item>
<Item>
<Author> ZK </author>
<Title> cname of TTT </title>
<Price> 10.3 </price>
</Item>
</Items>

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