Query a collection using PropertyInfo object in LINQ
I have a method with a signature like this
void RefreshMethod<T>(IEnumerable<T> lst, string propertyName) where T:class
{
Type type = typeof(T);
PropertyInfo property = type.GetProperties().Single(u => u.Name == primaryKeyProperty);
//query goes here
}
Now i want to query that collection for getting all the values whose
propertyName < 0
In a simple scenario it would be as easy as this
lst.where(u=>u.ID<0)
But here i don't have that ID property but have corresponding "PropertyInfo" object.
How should i acheive this.
kindly guide
You can lookup the property-value using property.GetValue(anObjectOfTypeT, null) .
So something like:
var refreshedList = lst.Where(l => ((int)(property.GetValue(l, null)) < 0).ToList();
This assumes the property will always be of type int though.
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