Question

I currently am using a data structures similar to the following:

public class Individual
{
    //Other properties omitted for brevity sake

    public List<IndividualName> IndividualNames {get; set;}            
}

and

public class IndividualName
{
    public string FamilyName {get; set;}
    public string GivenName {get; set;}
    public string MiddleName {get; set;}
}

I am attempting to use some Dynamic search expressions to pass from my presentation layer to repository level (to actually apply the search).

However, I have run into some issues due to the fact that an Individual can have 1-M Individual Names, and I am trying to use LINQ to grab all of an Individual’s IndividualNames so they can be queried.

For example’s sake – this is what the expression currently looks like:

searchExpressions.Add(new SearchExpression("Individual
                                           .IndividualNames
                                           .Select(GivenName)
                                           .FirstOrDefault()"
             , ComparisonOperator.Contains, "Test");

This will currently only determine if the GivenName in the first IndividualName instance Contains “Test”. The above works as it should – however I am a bit stuck in terms of how I would be able to determine if Any of the IndividualNames contained the string.

Any help would be appreciated – as I have tried several things without any luck.

Answer 1

I think you would be looking for….

searchExpressions.Add(new SearchExpression("Individual
                                            .IndividualNames
                                            .Select(GivenName)",
                      ComparisonOperator.Contains, "Test");

You will also need to add a Contains Aggregate Method to the Dynamic Linq library. How to do this can be found here.
http://blog.walteralmeida.com/2010/05/advanced-linq-dynamic-linq-library-add-support-for-contains-extension-.html