Question

I have a method that I want to use to filter a listview. I am creating the listview dynamically therfore I don’t know the number of colums in advance. lstCurrentDynamicItems is a class with just one property and that property is named c and its type is object[]. I created that class in order to hold objects of the listview. If I always would have the same listview then I would have no problem building the following method. How could I implement the following method?

public void filterListView(string[] columnsContains)
        {
            // lstCurrentDynamicItems is a list of objects
            // columnsContains is what I want to filter.             
            var qr = from a in lstCurrentDynamicItems
                     where a.c[0].ToString().Contains(columnsContains[0]) &&
                           a.c[1].ToString().Contains(columnsContains[1]) &&
                           a.c[2].ToString().Contains(columnsContains[2]) &&
                           //    ...
                           //    ...
                           //    ...
                           a.c[columnsContains.Length].ToString().Contains(columnsContains[columnsContains.Length])                            
                    select a;

            listView.DataContext = qr;
        }

Answer 1

Something like this should work:

var qr = 
from a in lstCurrentDynamicItems
where Enumerable.Range(0,columnsContains.Length)
                .All(i => a.c[i].ToString().Contains(columnsContains[i]))
select a;