private static BinaryExpression IsMatch(List <KeyValuePair <string, string> > keyValuePairs, SearchCondition condition)
{
if (keyValuePairs == null)
{
return(default(BinaryExpression));
}
var filterExpressions = new List <BinaryExpression>();
foreach (KeyValuePair <string, string> pair in keyValuePairs)
{
var kv = pair;
switch (kv.Key.ToUpperInvariant())
{
case "ID":
if (int.TryParse(kv.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out int id))
{
filterExpressions.Add(MakeBinary(kv.Key, id, Record));
}
else
{
throw new ArgumentException($"Id '{kv.Value}' is not valid.");
}
break;
case "FIRSTNAME":
case "LASTNAME":
filterExpressions.Add(MakeBinary(kv.Key, kv.Value, Record));
break;
case "DATEOFBIRTH":
if (DateTime.TryParse(kv.Value, out DateTime dateofbirth))
{
filterExpressions.Add(MakeBinary(kv.Key, dateofbirth, Record));
}
else
{
throw new ArgumentException($"Date of birth '{kv.Value}' is not valid.");
}
break;
case "GENDER":
if (char.TryParse(kv.Value, out char gender))
{
filterExpressions.Add(MakeBinary(kv.Key, gender, Record));
}
else
{
throw new ArgumentException($"Gender '{kv.Value}' is not valid.");
}
break;
case "OFFICE":
if (short.TryParse(kv.Value, out short office))
{
filterExpressions.Add(MakeBinary(kv.Key, office, Record));
}
else
{
throw new ArgumentException($"Office '{kv.Value}' is not valid.");
}
break;
default:
throw new InvalidOperationException(
$"The {kv.Key} isn't a search parameter name. Only 'Id', 'FirstName', 'LastName', 'DateOfBirth', 'Gender' or 'Office'.");
}
}
BinaryExpression filter = default(BinaryExpression);
if (condition.Equals(SearchCondition.Or))
{
filter = CombinePredicates(filterExpressions, Expression.Or);
}
else
{
filter = CombinePredicates(filterExpressions, Expression.And);
}
return(filter);
}
