Linq dynamically adding where conditions

Question

I have a gridview which has drop down boxes in each header for filtering. Each filter is loaded with the distinct values from its column when loaded. At run time, I add \"AL

Answer 1

You could create a helper method that handles the All logic. Something like:

private bool CompareSelectedValue(string value, string dropDownValue)
{
  if(dropDownValue == "ALL")
    return true;
  else
    return value == dropDownValue;
}

Then your query could be:

var filteredList = (from x in allQuotes
                          where (CompareSelectedValue(x.SalesRepFullName, drpOwners.SelectedValue)                                    
                                && CompareSelectedValue(x.CompanyName, drpCompanyName.SelectedValue)
                          select x);