Question

Xpath to search (filter) on 2 fields

Asked by: Pharmica

Greetings experts,

I need some help on writing a Xpath statement for Infopath to search a secondard datasource and return only results that match the filter(s).  I wrote the below but it does not work the way I want it to.  What needs to happen is when the Conitnent filter is selected the results will contain ONLY results with that Continent.  However, when the ONLY Country filter is selected it will show results for that Country.  Lastly, when both filters are selected it will show results where the row contains both filter values.  In my example below, when I select both the Country filter and Continent filter I get all rows that contain either the Country or Continent, as opposed to getting rows that contain both.  Let me know if that doesnt make sense.

           

XPathNavigator root = MainDataSource.CreateNavigator();
            XPathNavigator secDSNav = DataSources["Investigators"].CreateNavigator();
           
            string Countryfilter = root.SelectSingleNode("/my:myFields/my:SelectCountry", NamespaceManager).Value;
            string Continentfilter = root.SelectSingleNode("/my:myFields/my:SelectContinent", NamespaceManager).Value;
                           
            // Retrieve the rows of the secondary data source using filters from above
            XPathNodeIterator rows = secDSNav.Select("/dfs:myFields/dfs:dataFields/dfs:Investigators[@Country = '" + Countryfilter + "' or @Continent = '" + Continentfilter + "' or (@Country = '" + Countryfilter + "' and @Continent = '" + Continentfilter + "')]", NamespaceManager);

                                  
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Asked On
2009-10-22 at 06:55:05ID24834475
Topics

XPath

,

C# Programming Language

,

Infopath

Participating Experts
1
Points
500
Comments
1

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Answers

 

by: clayfoxPosted on 2009-10-22 at 08:35:52ID: 25635437

I think you are going at this the wrong way and making it way to complicated.  InfoPath has built in functionality that you can use without trying to build something your self.

You are describing what is called cascading dropdowns.  If you search on this term on www.infopathdev.com you can find many examples of how to set it up.

Essentially you create a data connection to the continent list and another to the country list. Create two fields and put them on your form with drop downs. Then on the second country dropdown you filter it by the first drop down.

Then for your repeating table with your main records you use conditional formating to only display what is equal to the drop down values or you put the selected value in query fields and query for that specifically.

Infopath can only do a dynamic query with web services or SQL data connections.

20120131-EE-VQP-002

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