public LambdaExpression MakeMembersInit(Type entityType, params string[] names)
{
ParameterExpression x = Expression.Parameter(entityType, "x");
MemberExpression[] members = new MemberExpression[names.Length];
Entity e = new Entity();
for (int i = 0; i < members.Length; i++)
{
members[i] = Expression.PropertyOrField(x, names[i]);
e.AddPropertyOrField(members[i]);
}
Type resultType = m_code_provider.GetType(e);
MemberAssignment[] assignments = new MemberAssignment[members.Length];
for (int i = 0; i < members.Length; i++)
{
MemberExpression me = members[i];
var mi = resultType.GetMember(me.Member.Name);
if (mi.Length > 0)
{
assignments[i] = Expression.Bind(mi[0], me);
}
}
return(Expression.Lambda(Expression.MemberInit(Expression.New(resultType), assignments), x));
}
public IQueryable CreateQuery(string entityName)
{
Type entityType = m_code_provider.GetType(m_data_provider.GetMetadata(), entityName);
return(Activator.CreateInstance(typeof(ObjectQuery <>).MakeGenericType(entityType), this) as IQueryable);
}
