Question

I am selecting data from a Datatable using Linq. Selection will be a column and requirement is functions should return string[]. I am not getting how to do convert results in to string[].

Please guide, below is my code:

 public string[] GetCompletionList(string prefixText)
 {
  if (HttpContext.Current.Cache["Dir"] == null)
  {
   return null;
  }

  DataTable dt = (DataTable)HttpContext.Current.Cache["Dir"];
  var details = from addresses in dt.AsEnumerable()
      where SqlMethods.Like(prefixText, prefixText + "%") || SqlMethods.Like(prefixText, "%" + prefixText + "%")
      select addresses["Details"];



  return details.tol;

 }

Answer 1

If each item in details is already a string simply use IEnumerable<T>.ToArray():

return details.ToArray();

If you need to convert it first (in my example I am using ToString()), you can use Select to project each item to a string:

return details.Select(x => x.ToString()).ToArray();