Question

Lets start off with a list of strings that will be used to filter the results:

 List<String> RadioNames = new List<String>();
 RadioNames.AddRange(new String[] { "abc", "123", "cba", "321" });

I want to be able to filter a LINQ to SQL database table based on RadioNames but the catch is that I want RadioNames to be a partial match (meaning it will catch Radio123 and not just 123).

The source that I need to filter is below:

var ChannelGrants = from cg in sddc.ChannelGrants
                    select new
                    {
                        cg.ID,
                        cg.Timestamp,
                        cg.RadioID,
                        cg.Radio
                    };

So I need to perform something similar to below (outside of the original ChannelGrants results as this is a conditional search)

 if(RadioNamesToSearch != null)
 {
      List<String> RadioNames = new List<String>();

      // Here I split all the radio names from RadioNamesToSearch based on a command separator and then populate RadioNames with the results

      ChannelGrants = from cg in ChannelGrants
                      where ???
                      select cg;
 }

I need help where ??? is in the code above (or if ChannelGrants = ... is invalid all together). Repeating above, I need to filter ChannelGrants to return any matches from RadioNames but it will do partial matches (meaning it will catch Radio123 and not just 123).

All the code is contained in a method as such…

 public static DataTable getBrowseChannelGrants(int Count = 300, String StartDate = null, String StartTime = null, String EndDate = null, String EndTime = null, String RadioIDs = null, String RadioNamesToSearch = null, String TalkgroupIDs = null, String TalkgroupNames = null, bool SortAsc = false)

Answer 1

At the moment, there doesn’t seem to be a best way so I’ll answer this until a new answer that doesn’t repeat the other answers that don’t work on this thread.