예제 #1
0
        /// <summary>
        /// Called when the user accesses a property dynamically (e.g. "xn.Countries")
        /// </summary>
        /// <returns>Depending on the data, this may return a collection of nodes
        /// or a single node or a string value.</returns>
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            result = null;

            // First search for nested elements
            var elems = container.Elements(nameResolver(binder.Name));

            if (elems.Count() == 1)
            {
                // Single element - wrap it inside DynamicXml
                result = new DynamicXml(elems.First(), ns, camelCase);
            }
            else if (elems.Count() != 0)
            {
                // Multiple elements - wrapp all inside DynamicXml & return sequecne
                result = elems.Select(e => new DynamicXml(e, ns, camelCase));
            }
            else
            {
                // No sub-element found. If the current node is Element, try attributes
                var element = container as XElement;
                if (element != null)
                {
                    result = element.Attributes(nameResolver(binder.Name)).FirstOrDefault();
                }

                // Special name 'Value' can be used to get the inner text.
                if (binder.Name == "Value")
                {
                    result = element.Value;
                }
            }
            return(result != null);
        }
예제 #2
0
    /// <summary>
    /// Called when the user accesses a property dynamically (e.g. "xn.Countries")
    /// </summary>
    /// <returns>Depending on the data, this may return a collection of nodes
    /// or a single node or a string value.</returns>
    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
      result = null;
      
      // First search for nested elements
      var elems = container.Elements(nameResolver(binder.Name));
      if (elems.Count() == 1)
        // Single element - wrap it inside DynamicXml
        result = new DynamicXml(elems.First(), ns, camelCase);
      else if (elems.Count() != 0)
      {
        // Multiple elements - wrapp all inside DynamicXml & return sequecne
        result = elems.Select(e => new DynamicXml(e, ns,  camelCase));
      }
      else
      {
        // No sub-element found. If the current node is Element, try attributes
        var element = container as XElement;
        if (element != null)
          result = element.Attributes(nameResolver(binder.Name)).FirstOrDefault();

        // Special name 'Value' can be used to get the inner text.
        if (binder.Name == "Value") result = element.Value;
      }
      return result != null;
    }
예제 #3
0
 /// <summary>
 /// Called when the C# code using 'dynamic' uses "wb.Foo(...)". The method
 /// treats this as a call to the "foo" service provided by WorldBank. The
 /// method takes an anonymous type as an argument, so it is possible to 
 /// specify any additional parameters dynamically. 
 /// </summary>
 /// <example><code>
 /// dynamic wb = new DynamicWorldBank();
 /// dynamic regions = wb.Region(new { PerPage = 100 });
 /// </code></example>
 /// <returns>
 /// Returns an instance of 'DynamicXml' type that can be used for easy
 /// access to XML documents using C# 4 'dynamic' keyword.
 /// </returns>
 public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
 {
   // Create URL for the request
   string url = "http://api.worldbank.org/" + new String(NormalizeName(binder.Name).ToArray());
   if (args.Length == 1) 
   {
     // If there is some anonymous type as argument, get its properties
     // and append them as arguments to the URL
     var separator = "?";
     foreach (var prop in args[0].GetType().GetProperties())
     {
       url = url + separator + 
         new String(NormalizeName(prop.Name).ToArray()) + "=" + 
         prop.GetValue(args[0], new object[] {}).ToString();
       separator = "&";
     }
   }
   // Perform HTTP request & return result as DynamicXml
   result = new DynamicXml(url, CamelCase: true, Namespace: "http://www.worldbank.org");
   return true;
 }