Question

I’m querying a datatable using linq, I then query the results to filter out what I want, the problem is that I need to query it for each value of an array these values are like this ,2, or ,22, or ,21, etc

so I usually do this

results = from a in results
     where a.countryId.ToString().Contains(value)
     select a;

what I would like to do is this

foreach(string str in arrayval)
{
results += from a in results 
      where a.countryId.ToString().Contains(str)
}

can anyone help or give me some clues

thanks

Answer 1

Looks like you want to select results based on comparison from the array values. Something like. Select * from table where ID in (1,2,3). Instead of concatenating results you can try the following query.

var result = from a in result
             where arrayval.Contains(a.CountryId.ToString())
             select a;

if your arrayval is an int type array then you may remove .ToString() at the end of a.CountryID