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PO.NET Reflection: Unable to retrieve Dynamic Properties
 

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  1. PO.NET Reflection: Unable to retrieve Dynamic Properties
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    <p><strong>I am adding dynamic property to a class with the help of Reflection. But unable to find new/dynamic Properties.</strong></p> <p><strong>Process:</strong> I have created a DynamicClass by implementing ICustomTypeDescriptor Interface and implements the function GetPropertiesI, I did my all manipulation here to get updated properties but it is not working..</p> <p>My DynamicClass code is here:</p> <pre><code>public class DynamicClass : ICustomTypeDescriptor { // Collection to code add dynamic properties /* KeyedCollection&lt;string, DynamicProperty&gt; _properties; public KeyedCollection&lt;string, DynamicProperty&gt; Properties { get;// { return _properties; } set;// { _properties = value; } } */ public void AddProperty(DynamicProperty _property) { PropertyInfo[] instanceProps = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); // Fill property collection with founded properties PropertyDescriptorCollection propsCollection = new PropertyDescriptorCollection(instanceProps.Cast&lt;PropertyDescriptor&gt;().ToArray()); propsCollection.Add(new DynamicPropertyDescriptor( _property.ComponentType, _property.PropertyName, _property.PropertyType, _property.Component, _property.Value )); } public void AddProperties(KeyedCollection&lt;string, DynamicProperty&gt; _properties) { PropertyInfo[] instanceProps = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); // Fill property collection with founded properties PropertyDescriptorCollection propsCollection = new PropertyDescriptorCollection(instanceProps.Cast&lt;PropertyDescriptor&gt;().ToArray()); foreach (var p in _properties) { propsCollection.Add(new DynamicPropertyDescriptor( p.ComponentType, p.PropertyName, p.PropertyType, p.Component, p.Value )); } } PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties() { PropertyInfo[] instanceProps = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); PropertyDescriptorCollection propsCollection = new PropertyDescriptorCollection(instanceProps.Cast&lt;PropertyDescriptor&gt;().ToArray()); return propsCollection; } // ICustomTypeDescriptor implementation PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties() { // Properties founded within instance PropertyInfo[] instanceProps = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); // Fill property collection with founded properties PropertyDescriptorCollection propsCollection = new PropertyDescriptorCollection(instanceProps.Cast&lt;PropertyDescriptor&gt;().ToArray()); //propsCollection.Cast.&lt;CustomPropertyDescriptor&gt;().Concat(Properties).ToArray(); // Fill property collection with dynamic properties (Properties) //List&lt;DynamicPropertyDescriptor&gt; _dynamicPropertyDescriptors = new List&lt;DynamicPropertyDescriptor&gt;(); //instanceProps.Cast&lt;DynamicPropertyDescriptor&gt;().Concat().ToArray(); return propsCollection; } #region ICustomTypeDescriptor Members public System.ComponentModel.AttributeCollection GetAttributes() { throw new NotImplementedException(); } public string GetClassName() { throw new NotImplementedException(); } public string GetComponentName() { throw new NotImplementedException(); } public TypeConverter GetConverter() { throw new NotImplementedException(); } public EventDescriptor GetDefaultEvent() { throw new NotImplementedException(); } public PropertyDescriptor GetDefaultProperty() { throw new NotImplementedException(); } public object GetEditor(Type editorBaseType) { throw new NotImplementedException(); } public EventDescriptorCollection GetEvents(Attribute[] attributes) { throw new NotImplementedException(); } public EventDescriptorCollection GetEvents() { throw new NotImplementedException(); } public PropertyDescriptorCollection GetProperties(Attribute[] attributes) { PropertyInfo[] instanceProps = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance); PropertyDescriptorCollection propsCollection = new PropertyDescriptorCollection(instanceProps.Cast&lt;PropertyDescriptor&gt;().ToArray()); return propsCollection; /* if (!this.DesignMode) { PropertyDescriptorCollection collection = TypeDescriptor.GetProperties(this, attributes, true); PropertyDescriptorCollection newList = new PropertyDescriptorCollection(new PropertyDescriptor[0]); foreach (PropertyDescriptor prop in collection) { Attribute a = prop.Attributes[typeof(CategoryAttribute)]; if (a != null &amp;&amp; ((CategoryAttribute)a).Category == "SixDisciplines") newList.Add(prop); } return newList; } else //The control must be passed to the method. return TypeDescriptor.GetProperties(this, attributes, true); */ } public object GetPropertyOwner(PropertyDescriptor pd) { throw new NotImplementedException(); } #endregion </code></pre> <p>}</p>
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    1. USAnkit Agrawal
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    1. CO`GetProperties()` reflects over the compile-time `type`, not the instance. That's why you're not seeing the new properties.
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      1. USRobert Harvey
    2. COSo tell me what to do?
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      1. USAnkit Agrawal
    3. COSee my answer below.
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      1. PO.NET Reflection: Unable to retrieve Dynamic Properties
      1. USRobert Harvey
 

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