DictionaryCustomTypeDescriptor.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / Util / DictionaryCustomTypeDescriptor.cs / 1305376 / DictionaryCustomTypeDescriptor.cs
                        

                        
                            namespace System.Web.DynamicData.Util { 
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Linq; 

    internal class DictionaryCustomTypeDescriptor : CustomTypeDescriptor { 
        private IDictionary _values; 
        private PropertyDescriptorCollection _properties;
 
        public DictionaryCustomTypeDescriptor(IDictionary values) {
            if (values == null) {
                throw new ArgumentNullException("values");
            } 
            _values = values;
        } 
 
        public object GetValue(string name) {
            object value; 
            if (_values.TryGetValue(name, out value)) {
                return value;
            }
            return null; 
        }
 
        public override PropertyDescriptorCollection GetProperties() { 
            if (_properties == null) {
                var dictionaryProps = _values.Keys.Select(propName => new DictionaryPropertyDescriptor(propName)); 
                _properties = new PropertyDescriptorCollection(dictionaryProps.ToArray());
            }
            return _properties;
        } 
    }
 
    internal class DictionaryPropertyDescriptor : PropertyDescriptor { 
        public DictionaryPropertyDescriptor(string name)
            : base(name, null /* attrs */) { 
        }

        public override bool CanResetValue(object component) {
            throw new NotSupportedException(); 
        }
 
        public override Type ComponentType { 
            get {
                throw new NotSupportedException(); 
            }
        }

        public override object GetValue(object component) { 
            // Try to cast the component to a DictionaryCustomTypeDescriptor and get the value in the dictonary
            //  that corresponds to this property 
            DictionaryCustomTypeDescriptor typeDescriptor = component as DictionaryCustomTypeDescriptor; 
            if (typeDescriptor == null) {
                return null; 
            }

            return typeDescriptor.GetValue(Name);
        } 

        public override bool IsReadOnly { 
            get { 
                throw new NotSupportedException();
            } 
        }

        public override Type PropertyType {
            get { 
                throw new NotSupportedException();
            } 
        } 

        public override void ResetValue(object component) { 
            throw new NotSupportedException();
        }

        public override void SetValue(object component, object value) { 
            throw new NotSupportedException();
        } 
 
        public override bool ShouldSerializeValue(object component) {
            throw new NotSupportedException(); 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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