Try our conversational search powered by Generative AI!

Jonas Bergqvist
Feb 25, 2011
(1 votes)

Typed “Find” method in Dynamic data store

On the morning train to work, I played around with the DDS, and made a couple of extension methods to fix something I’ve been irritated about for a while.

The “typed” find method in the DDS takes the name of a property, and the value the property must have to receive the object from the store. This isn’t that nice, and I’m the one to blame. Therefore, I’ve created the following two extensions:

public static IEnumerable<TStore> Find<TStore, TFind>(this DynamicDataStore store, Expression<Func<TStore, TFind>> property, TFind value)
        string propertyName = MultipleFind<TStore>.GetPropertyName<TFind>(property);
        return store.Find<TStore>(propertyName, value);
public static IEnumerable<TStore> Find<TStore>(this DynamicDataStore store, MultipleFind<TStore> find)
    return store.Find<TStore>(find.Dictionary);

Those extension methods uses the following class that I needed to create:

    public class MultipleFind<TStore>
        private Dictionary<string, object> _find;
        public MultipleFind()
            _find = new Dictionary<string, object>();
        public void Add<TFind>(Expression<Func<TStore, TFind>> property, TFind value)
            _find.Add(GetPropertyName<TFind>(property), value);
        public static string GetPropertyName<TFind>(Expression<Func<TStore, TFind>> property)
            MemberExpression member = property.Body as MemberExpression;
            if (member == null)
                throw new NotSupportedException("Find method only works directly against properties at the moment");
            return member.Member.Name;
        public Dictionary<string, object> Dictionary
                return new Dictionary<string, object>(_find);

Those can be used like this:

var result = _personStore.Find<Person, int>(p => p.ShoeSize, 40);
MultipleFind<Person> findings = new MultipleFind<Person>();
findings.Add(p => p.ShoeSize, 40);
findings.Add(p => p.FirstName, "Jonas");
var result2 = _personStore.Find<Person>(findings);

Compared with:

var result = personStore.Find<Person>("ShoeSize", 40);
Dictionary<string, object> search = new Dictionary<string, object>();
search.Add("ShoeSize", 40);
search.Add("FirstName", "Jonas");
var result2 = personStore.Find<Person>(search);
Feb 25, 2011


Please login to comment.
Latest blogs
From Procrastination to Proficiency: Navigating Your Journey to Web Experimentation Certification

Hey there, Optimizely enthusiasts!   Join me in celebrating a milestone – I'm officially a certified web experimentation expert! It's an exhilarati...

Silvio Pacitto | May 17, 2024

GPT-4o Now Available for Optimizely via the AI-Assistant plugin!

I am excited to announce that GPT-4o is now available for Optimizely users through the Epicweb AI-Assistant integration. This means you can leverag...

Luc Gosso (MVP) | May 17, 2024 | Syndicated blog

The downside of being too fast

Today when I was tracking down some changes, I came across this commit comment Who wrote this? Me, almost 5 years ago. I did have a chuckle in my...

Quan Mai | May 17, 2024 | Syndicated blog

Optimizely Forms: Safeguarding Your Data

With the rise of cyber threats and privacy concerns, safeguarding sensitive information has become a top priority for businesses across all...

K Khan | May 16, 2024

The Experimentation Process

This blog is part of the series -   Unlocking the Power of Experimentation: A Marketer's Insight. Welcome back, to another insightful journey into...

Holly Quilter | May 16, 2024

Azure AI Language – Sentiment Analysis in Optimizely CMS

In the following article, I showcase how sentiment analysis, which is part of the Azure AI Language service, can be used to detect the sentiment of...

Anil Patel | May 15, 2024 | Syndicated blog