public QueryExpressionXmlConverter(QueryCreator @creator = null, TypeResolver resolver = null)
{
this.creator = @creator;
this.resolver = resolver;
}
public void QueryExpressionXmlConverterTest()
{
Type elementType = typeof(Customer);
var creator = new QueryCreator(this.FnGetObjects);
var converter = new QueryExpressionXmlConverter(creator, this.resolver);
bool success;
XElement x;
Expression e;
MethodCallExpression m;
ConstantExpression cx;
IQueryProvider provider;
//the client Query. IQueryProvider has not real data.
Query<Customer> query = new Query<Customer>(default(IQueryProvider));
provider = ((IQueryable)query).Provider;
IQueryable<Customer> queryable;
queryable = from c in query
where c.ID == null //initialized with properties == null
select c;
//serialize to XML
e = Expression.Constant(queryable);
success = converter.TrySerialize(e, out x);
//deserialize to ConstantExpression(Query)
success = converter.TryDeserialize(x, out e);
cx = (ConstantExpression)e;
Query<Customer> serverquery = (Query<Customer>)cx.Value;
//upon deserialization, should have a new IQueryProvider
Assert.AreNotEqual(provider, ((IQueryable)serverquery).Provider);
provider = ((IQueryable)serverquery).Provider;
//Execute Query on server side.
int count = serverquery.Count();
}
public QueryExpressionXmlConverter(QueryCreator creator = null, TypeResolver resolver = null)
{
this.creator = creator;
this.resolver = resolver;
}
public void CreateNewQuery_Execute()
{
QueryCreator creator = new QueryCreator();
Type elementType = typeof(Customer);
Query<Customer> query = creator.CreateQuery(elementType);
IQueryable<Customer> queryable;
queryable = from c in query
where c.ID == null //initialized with properties == null
select c;
IQueryProvider provider = ((IQueryable)query).Provider;
//execute:
var ienumerable = provider.Execute<IEnumerable<Customer>>(queryable.Expression);
var list = ienumerable.ToList();
//new QueryCreator:
creator = new QueryCreator(this.FnGetObjects);
query = creator.CreateQuery(elementType);
queryable = from c in query
where c.ID == null //initialized with properties == null
select c;
provider.Execute<IEnumerable<Customer>>(queryable.Expression).ToList();
}
