Question

I have a list which has a single record i.e which matches to a particular ID.

Now I want to use this list’s property(i.e. a column for that single record) without using FOREACH loop as it will just cause burden for server because my program is already having lot of loops…
Can it be done??

I am filtering the records brought from ViewState based on an ID..

var selectedPracticeInfo = 
          (List<PropPractice>) ViewState["dicPracticesInGrupWithTimeZone"];

var selectedPracticeforEncounter = 
             from selectedPractice in selectedPracticeInfo
             where 
                selectedPractice.PracticeId 
                     == Convert.ToInt32(ddlPractice.SelectedValue)
  select new PropPractice
  {
    PracticeId = selectedPractice.PracticeId,
    PracticeName = selectedPractice.PracticeName,
    TimeZoneDisplayName = selectedPractice.TimeZoneDisplayName
  };

I am planning to do something like this which will pull out the TimeZoneDisplayName of that Single record directly but it says “String cannot be used as Boolean”..

var practiceTimeZoneName 
       = selectedPracticeforEncounter
               .Single(practice=>practice.TimeZoneDisplayName

So,I wanted to ask if it can be done by some way except FOREACH??

Answer 1

Is this something like you require? First Or Default will ensure you get a single record or null

var result = selectedPracticeInfo
             .Where(m=> m.PracticeID == (Int32)ddlPractice.SelectedValue)
             .FirstOrDefault();

if(result != null){

var timezone = result.TimeZoneDisplayName;

}

result will be a type of PropPractice but for good practice use strongly defined where you can

PropPractice = selectedPracticeInfo
               .Where(m=> m.PracticeID == (Int32)ddlPractice.SelectedValue)
               .FirstOrDefault();

you will not need the below to create the new object:

select new PropPractice
  {
    PracticeId = selectedPractice.PracticeId,
    PracticeName = selectedPractice.PracticeName,
    TimeZoneDisplayName = selectedPractice.TimeZoneDisplayName
  };