public static IEnumerable <T> SelectIncluding <T>(
this IQueryable <T> source,
IEnumerable <Expression <Func <T, object> > > includeExpessions)
{
if (source == null)
{
throw new ArgumentNullException("Source Object is NULL");
}
ParameterExpression parameterExpression = Expression.Parameter(source.ElementType, "t");
IQueryableExtensions.PredicateRewriterVisitor predicateRewriterVisitor = new IQueryableExtensions.PredicateRewriterVisitor(parameterExpression);
Dictionary <string, Tuple <Expression, Type> > dynamicFields = new Dictionary <string, Tuple <Expression, Type> >();
int num = 0;
foreach (Expression <Func <T, object> > includeExpession in includeExpessions)
{
if (includeExpession.Body.NodeType == ExpressionType.Convert || includeExpession.Body.NodeType == ExpressionType.ConvertChecked)
{
UnaryExpression body = includeExpession.Body as UnaryExpression;
if (body != null)
{
Type type = body.Operand.Type;
}
}
Type type1 = includeExpession.Body.Type;
dynamicFields.Add("f" + (object)num, new Tuple <Expression, Type>(predicateRewriterVisitor.ReplaceParameter(includeExpession.Body, includeExpession.Parameters[0]), type1));
++num;
}
dynamicFields.Add("sourceObject", new Tuple <Expression, Type>((Expression)parameterExpression, source.ElementType));
Type dynamicType = DynamicTypeBuilder.GetDynamicType(dynamicFields.ToDictionary <KeyValuePair <string, Tuple <Expression, Type> >, string, Type>((Func <KeyValuePair <string, Tuple <Expression, Type> >, string>)(x => x.Key), (Func <KeyValuePair <string, Tuple <Expression, Type> >, Type>)(x => x.Value.Item2)), typeof(object), Type.EmptyTypes);
List <MemberBinding> list = ((IEnumerable <FieldInfo>)dynamicType.GetFields()).Select <FieldInfo, MemberAssignment>((Func <FieldInfo, MemberAssignment>)(p => Expression.Bind((MemberInfo)p, dynamicFields[p.Name].Item1))).OfType <MemberBinding>().ToList <MemberBinding>();
Expression <Func <T, object> > selector = Expression.Lambda <Func <T, object> >((Expression)Expression.MemberInit(Expression.New(dynamicType.GetConstructor(Type.EmptyTypes)), (IEnumerable <MemberBinding>)list), parameterExpression);
return(source.Select <T, object>(selector).AsEnumerable <object>().Select <object, T>((Func <object, T>)(x =>
{
// ISSUE: reference to a compiler-generated field
if (IQueryableExtensions.o__13 <T> .p__1 == null)
{
// ISSUE: reference to a compiler-generated field
IQueryableExtensions.o__13 <T> .p__1 = CallSite <Func <CallSite, object, T> > .Create(Microsoft.CSharp.RuntimeBinder.Binder.Convert(CSharpBinderFlags.ConvertExplicit, typeof(T), typeof(IQueryableExtensions)));
}
// ISSUE: reference to a compiler-generated field
Func <CallSite, object, T> target = IQueryableExtensions.o__13 <T> .p__1.Target;
// ISSUE: reference to a compiler-generated field
CallSite <Func <CallSite, object, T> > p1 = IQueryableExtensions.o__13 <T> .p__1;
// ISSUE: reference to a compiler-generated field
if (IQueryableExtensions.o__13 <T> .p__0 == null)
{
// ISSUE: reference to a compiler-generated field
IQueryableExtensions.o__13 <T> .p__0 = CallSite <Func <CallSite, object, object> > .Create(Microsoft.CSharp.RuntimeBinder.Binder.GetMember(CSharpBinderFlags.None, "sourceObject", typeof(IQueryableExtensions), (IEnumerable <CSharpArgumentInfo>) new CSharpArgumentInfo[1]
{
CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, (string)null)
}));
}
// ISSUE: reference to a compiler-generated field
// ISSUE: reference to a compiler-generated field
object obj = IQueryableExtensions.o__13 <T> .p__0.Target((CallSite)IQueryableExtensions.o__13 <T> .p__0, x);
return target((CallSite)p1, obj);
})));
}
public static IQueryable <object> SelectBy <T>(
this IQueryable <T> source,
IEnumerable <string> propertyNames)
{
if (source == null)
{
throw new ArgumentNullException("Source Object is NULL");
}
ParameterExpression sourceItem = Expression.Parameter(source.ElementType, "t");
Dictionary <string, PropertyInfo> sourceProperties = propertyNames.Where <string>((Func <string, bool>)(name => source.ElementType.GetProperty(name) != (PropertyInfo)null)).ToDictionary <string, string, PropertyInfo>((Func <string, string>)(name => name), (Func <string, PropertyInfo>)(name => source.ElementType.GetProperty(name)));
Type dynamicType = DynamicTypeBuilder.GetDynamicType(sourceProperties.Values.ToDictionary <PropertyInfo, string, Type>((Func <PropertyInfo, string>)(f => f.Name), (Func <PropertyInfo, Type>)(f => f.PropertyType)), typeof(object), Type.EmptyTypes);
List <MemberBinding> list = ((IEnumerable <FieldInfo>)dynamicType.GetFields()).Select <FieldInfo, MemberAssignment>((Func <FieldInfo, MemberAssignment>)(p => Expression.Bind((MemberInfo)p, (Expression)Expression.Property((Expression)sourceItem, sourceProperties[p.Name])))).OfType <MemberBinding>().ToList <MemberBinding>();
Expression <Func <T, object> > selector = Expression.Lambda <Func <T, object> >((Expression)Expression.MemberInit(Expression.New(dynamicType.GetConstructor(Type.EmptyTypes)), (IEnumerable <MemberBinding>)list), sourceItem);
return(source.Select <T, object>(selector));
}
public static Type GetDynamicType(
Dictionary <string, Type> fields,
Type basetype,
Type[] interfaces)
{
if (fields == null)
{
throw new ArgumentNullException(nameof(fields));
}
if (fields.Count == 0)
{
throw new ArgumentOutOfRangeException(nameof(fields), "fields must have at least 1 field definition");
}
try
{
Monitor.Enter((object)DynamicTypeBuilder.builtTypes);
string typeKey = DynamicTypeBuilder.GetTypeKey(fields);
if (DynamicTypeBuilder.builtTypes.ContainsKey(typeKey))
{
return(DynamicTypeBuilder.builtTypes[typeKey].Item2);
}
string name = "DynamicLinqType" + DynamicTypeBuilder.builtTypes.Count.ToString();
TypeBuilder typeBuilder = DynamicTypeBuilder.moduleBuilder.DefineType(name, TypeAttributes.Public | TypeAttributes.Serializable, (Type)null, Type.EmptyTypes);
foreach (KeyValuePair <string, Type> field in fields)
{
typeBuilder.DefineField(field.Key, field.Value, FieldAttributes.Public);
}
DynamicTypeBuilder.builtTypes[typeKey] = new Tuple <string, Type>(name, typeBuilder.CreateType());
return(DynamicTypeBuilder.builtTypes[typeKey].Item2);
}
catch
{
throw;
}
finally
{
Monitor.Exit((object)DynamicTypeBuilder.builtTypes);
}
}
