public XmlQuery GetXmlQuery(string xmlPath)
{
var xmlQuery = new XmlQuery();
using (var xmlReader = XmlReader.Create(xmlPath))
{
while (xmlReader.Read())
{
if (xmlReader.IsStartElement() && xmlReader.Name == "OrderBy")
{
xmlReader.Read();
xmlQuery.Order = xmlReader.Value;
}
else if (xmlReader.IsStartElement() && xmlReader.Name == "WhereClause")
{
var whereClauseToAdd = new XmlWhereClause
{
PropertyName = xmlReader.GetAttribute("PropertyName"),
Type = xmlReader.GetAttribute("Type")
};
xmlReader.Read();
whereClauseToAdd.Value = xmlReader.Value;
xmlQuery.WhereClauses.Add(whereClauseToAdd);
}
}
}
return(xmlQuery);
}
public IEnumerable <Car> ProcessQueries(XmlQuery xmlQuery, IEnumerable <Car> cars)
{
foreach (var query in xmlQuery.WhereClauses)
{
string propName = query.PropertyName;
if (propName == "Year")
{
switch (query.WhereType)
{
case WhereType.Equals:
cars = cars.Where(c => c.Year == int.Parse(query.Value));
break;
case WhereType.GreaterThan:
cars = cars.Where(c => c.Year > int.Parse(query.Value));
break;
case WhereType.LessThan:
cars = cars.Where(c => c.Year < int.Parse(query.Value));
break;
}
}
else if (propName == "Price")
{
switch (query.WhereType)
{
case WhereType.Equals:
cars = cars.Where(c => c.Price == decimal.Parse(query.Value));
break;
case WhereType.GreaterThan:
cars = cars.Where(c => c.Price > decimal.Parse(query.Value));
break;
case WhereType.LessThan:
cars = cars.Where(c => c.Price < decimal.Parse(query.Value));
break;
}
}
else if (propName == "Model")
{
switch (query.WhereType)
{
case WhereType.Contains:
cars = cars.Where(c => c.Model.Contains(query.Value));
break;
case WhereType.Equals:
cars = cars.Where(c => c.Model == query.Value);
break;
}
}
else if (propName == "Manufacturer")
{
switch (query.WhereType)
{
case WhereType.Contains:
cars = cars.Where(c => c.Manufacturer.Name.Contains(query.Value));
break;
case WhereType.Equals:
cars = cars.Where(c => c.Manufacturer.Name == query.Value);
break;
}
}
else if (propName == "City")
{
switch (query.WhereType)
{
case WhereType.Contains:
cars = cars.Where(c => c.Dealer.Cities.Any(dc => dc.Name.Contains(query.Value)));
break;
case WhereType.Equals:
cars = cars.Where(c => c.Dealer.Cities.Any(dc => dc.Name == query.Value));
break;
}
}
else if (propName == "Dealer")
{
switch (query.WhereType)
{
case WhereType.Contains:
cars = cars.Where(x => x.Dealer.Name.Contains(query.Value));
break;
case WhereType.Equals:
cars = cars.Where(x => x.Dealer.Name == query.Value);
break;
}
}
}
return(cars);
}
