// moteda sprawdzajaca czy w podanym searchQuery ma zasosowanie filtr, jesli tak to podaje ktorego pola i wartosci filtr dotyczy
public bool CheckStringForBeingApplied(string searchQuery, out string fieldName, out string value)
{
fieldName = "";
value = "";
if (!(searchQuery.Length > 0))
{
return(false);
}
string[] words = searchQuery.Trim().Split(new char[] { ' ' });
foreach (string s in words)
{
if (s.Trim().ToUpper().StartsWith(SearchKey.ToUpper() + Delimiter))
{
foreach (var prop in (typeof(T)).GetProperties())
{
if (prop.Name == FieldName)
{
value = s.Trim().Remove(0, (SearchKey + Delimiter).Length);
fieldName = FieldName;
return(true);
}
}
}
}
return(false);
}
public override void ExecuteFilter(ref IQueryable <T> query, ref string searchQuery)
{
string Field = "";
//string Value = "";
if (CheckStringForBeingApplied(searchQuery, out Field, out SearchValue))
{
ParameterExpression parameter = Expression.Parameter(typeof(T), "x");
Expression property = Expression.Property(parameter, Field);
Expression target = Expression.Constant(SearchValue /*.ToUpper()*/, typeof(string));
MethodInfo mi = typeof(string).GetMethod("Contains", new Type[] { typeof(string) });
Expression equalsMethod = Expression.Call(property, mi, target);
Expression <Func <T, bool> > lambda = Expression.Lambda <Func <T, bool> >(equalsMethod, parameter);
query = query.Where(lambda);
Executed = true;
int iStart = searchQuery.ToUpper().IndexOf(SearchKey.ToUpper() + Delimiter + SearchValue.ToUpper());
int iLen = (SearchKey + Delimiter + SearchValue).Length;
searchQuery = searchQuery.Remove(iStart, iLen).Trim();
}
}
