public static GenericSetter CreateGenericSetter(Type type, MemberInfo memberInfo)
{
if (memberInfo == null)
{
throw new ArgumentNullException("propertyInfo");
}
// if has no write
if (memberInfo is PropertyInfo && (memberInfo as PropertyInfo).CanWrite == false)
{
return(null);
}
#if NET35
// do not use Expression in Structs (there is no Expression.Unbox in NET3.5)
if (type.IsValueType)
{
// if member is property, use GetSetMethod
if (memberInfo is PropertyInfo)
{
var setMethod = (memberInfo as PropertyInfo).GetSetMethod();
return((t, v) => setMethod.Invoke(t, new[] { v }));
}
else
{
return(null); // no field on Structs
}
}
#endif
var dataType = memberInfo is PropertyInfo ?
(memberInfo as PropertyInfo).PropertyType :
(memberInfo as FieldInfo).FieldType;
var target = Expression.Parameter(typeof(object), "obj");
var value = Expression.Parameter(typeof(object), "val");
#if NET35
var castTarget = Expression.Convert(target, type);
#else
var castTarget = type.GetTypeInfo().IsValueType ?
Expression.Unbox(target, type) :
Expression.Convert(target, type);
#endif
var castValue = Expression.ConvertChecked(value, dataType);
var accessor =
memberInfo is PropertyInfo?Expression.Property(castTarget, memberInfo as PropertyInfo) :
memberInfo is FieldInfo?Expression.Field(castTarget, memberInfo as FieldInfo) : null;
#if NET35
var assign = ExpressionExtensions.Assign(accessor, castValue);
#else
var assign = Expression.Assign(accessor, castValue);
#endif
var conv = Expression.Convert(assign, typeof(object));
return(Expression.Lambda <GenericSetter>(conv, target, value).Compile());
}
public static GenericSetter CreateGenericSetter(Type type, MemberInfo memberInfo)
{
if (memberInfo == null)
{
throw new ArgumentNullException("propertyInfo");
}
var fieldInfo = memberInfo as FieldInfo;
var propertyInfo = memberInfo as PropertyInfo;
// if is property and has no write
if (memberInfo is PropertyInfo && propertyInfo.CanWrite == false)
{
return(null);
}
// if *Structs*, use direct reflection - net35 has no Expression.Unbox to cast target
if (type.GetTypeInfo().IsValueType)
{
return(memberInfo is FieldInfo ?
(GenericSetter)fieldInfo.SetValue :
((t, v) => propertyInfo.SetValue(t, v, null)));
}
var dataType = memberInfo is PropertyInfo ?
propertyInfo.PropertyType :
fieldInfo.FieldType;
var target = Expression.Parameter(typeof(object), "obj");
var value = Expression.Parameter(typeof(object), "val");
var castTarget = Expression.Convert(target, type);
var castValue = Expression.ConvertChecked(value, dataType);
var accessor = memberInfo is PropertyInfo?
Expression.Property(castTarget, propertyInfo) :
Expression.Field(castTarget, fieldInfo);
var assign = ExpressionExtensions.Assign(accessor, castValue);
var conv = Expression.Convert(assign, typeof(object));
return(Expression.Lambda <GenericSetter>(conv, target, value).Compile());
}
public static GenericSetter CreateGenericSetter(Type type, MemberInfo memberInfo)
{
if (memberInfo == null)
{
throw new ArgumentNullException("propertyInfo");
}
var fieldInfo = memberInfo as FieldInfo;
var propertyInfo = memberInfo as PropertyInfo;
// // if is property and has no write
// hh: private setters
if (memberInfo is PropertyInfo && propertyInfo.CanWrite == false)
{
PropertyInfo pi = null;
var bt = type;
do
{
bt = bt.GetTypeInfo().BaseType;
if (bt == null)
{
break;
}
pi = bt.GetProperties(BindingFlags.Instance | BindingFlags.FlattenHierarchy | BindingFlags.NonPublic | BindingFlags.Public).FirstOrDefault(x => x.Name == propertyInfo.Name);
} while (bt != null && (pi == null || !pi.CanWrite));
if (pi == null)
{
return(null);
}
return((t, v) => pi.SetValue(t, v, null));
}
// if *Structs*, use direct reflection - net35 has no Expression.Unbox to cast target
if (type.GetTypeInfo().IsValueType)
{
return(memberInfo is FieldInfo ?
(GenericSetter)fieldInfo.SetValue :
((t, v) => propertyInfo.SetValue(t, v, null)));
}
var dataType = memberInfo is PropertyInfo ?
propertyInfo.PropertyType :
fieldInfo.FieldType;
var target = Expression.Parameter(typeof(object), "obj");
var value = Expression.Parameter(typeof(object), "val");
var castTarget = Expression.Convert(target, type);
var castValue = Expression.ConvertChecked(value, dataType);
var accessor = memberInfo is PropertyInfo?
Expression.Property(castTarget, propertyInfo) :
Expression.Field(castTarget, fieldInfo);
var assign = ExpressionExtensions.Assign(accessor, castValue);
var conv = Expression.Convert(assign, typeof(object));
return(Expression.Lambda <GenericSetter>(conv, target, value).Compile());
}
