Prototype.js Template to C# 3.0

Sun, 2008-01-20 18:17

Have you ever seen such syntax in JavaScript:

If you worked with great library Prototype.js surely yes. Such functionality implemented in class Template, which has just one method - evaluate. It does replacement in string template using input data object.

Now comes the tasty thing. How do you thing is it possible in C# 3.0? Of course yes! Let’s write the test (I expect you’ve heard about TDD):

Now we should implement Template class. Use a little bit reflection and we got prototype.js Template on C# 3.0.

public class Template
    {
       
        readonly string  _template;
    
        private  Hashtable GetPropertyHash(object properties)
        {

Hashtable values = null;
            if (properties != null)
            {
                values = new Hashtable();
                PropertyDescriptorCollection props = TypeDescriptor.GetProperties(properties);
                foreach (PropertyDescriptor prop in props)
                {
                    values.Add(prop.Name, prop.GetValue(properties));
                }
            }

return values;
        }

public Template(string template)
        {
            _template = template;
        }
        public string Evaluate(object o)
        {
            Hashtable table = GetPropertyHash(o);
            string s = _template;
            foreach (DictionaryEntry v in table)
            {
                s = s.Replace("#{"+v.Key+"}",v.Value.ToString());
            }
            return s;
        }

}

Be happy of using it :)

In russian

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