ParseChildrenAsPropertiesAttribute.cs source code in C# .NET

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                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / ParseChildrenAsPropertiesAttribute.cs / 1305376 / ParseChildrenAsPropertiesAttribute.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Security.Permissions;
    using System.Web.Util;
 
    /// 
    /// Define the metadata attribute that controls use to mark the fact 
    /// that their children are in fact properties. 
    /// Furthermore, if a string is passed in the constructor, it specifies
    /// the name of the defaultproperty. 
    /// 
    [AttributeUsage(AttributeTargets.Class)]
    public sealed class ParseChildrenAttribute : Attribute {
 

        public static readonly ParseChildrenAttribute ParseAsChildren = new ParseChildrenAttribute(false, false); 
 

        public static readonly ParseChildrenAttribute ParseAsProperties = new ParseChildrenAttribute(true, false); 


        public static readonly ParseChildrenAttribute Default = ParseAsChildren;
 
        private bool _childrenAsProps;
        private string _defaultProperty; 
        private Type _childControlType; 

        private bool _allowChanges = true; 


        /// 
        /// Needed to use named parameters (ASURT 78869) 
        /// 
        public ParseChildrenAttribute() : this(false, null) { 
        } 

 
        /// 
        /// 
        public ParseChildrenAttribute(bool childrenAsProperties) : this(childrenAsProperties, null) {
        } 

        public ParseChildrenAttribute(Type childControlType) : this(false, null) { 
            if (childControlType == null) { 
                throw new ArgumentNullException("childControlType");
            } 

            _childControlType = childControlType;
        }
 
        /// 
        /// Needed to create immutable static readonly instances of this attribute 
        ///  
        private ParseChildrenAttribute(bool childrenAsProperties, bool allowChanges) : this(childrenAsProperties, null) {
            _allowChanges  = allowChanges; 
        }


        ///  
        /// 
        public ParseChildrenAttribute(bool childrenAsProperties, string defaultProperty) { 
            _childrenAsProps = childrenAsProperties; 
            if (_childrenAsProps == true) {
                _defaultProperty = defaultProperty; 
            }
        }

 
        /// 
        ///    Indicates the allowed child control type. 
        ///       This property is read-only. 
        /// 
        public Type ChildControlType { 
            get {
                if (_childControlType == null) {
                    return typeof(System.Web.UI.Control);
                } 

                return _childControlType; 
            } 
        }
 

        /// 
        /// 
        public bool ChildrenAsProperties { 
            get {
                return _childrenAsProps; 
            } 
            set {
                if (_allowChanges == false) { 
                    throw new NotSupportedException();
                }
                _childrenAsProps = value;
            } 
        }
 
 
        /// 
        ///  
        public string DefaultProperty {
            get {
                if (_defaultProperty == null) {
                    return String.Empty; 
                }
                return _defaultProperty; 
            } 
            set {
                if (_allowChanges == false) { 
                    throw new NotSupportedException();
                }
                _defaultProperty = value;
            } 
        }
 
 
        /// 
        ///  
        /// 
        public override int GetHashCode() {
            if (_childrenAsProps == false) {
                return HashCodeCombiner.CombineHashCodes(_childrenAsProps.GetHashCode(), _childControlType.GetHashCode()); 
            }
            else { 
                return HashCodeCombiner.CombineHashCodes(_childrenAsProps.GetHashCode(), DefaultProperty.GetHashCode()); 
            }
        } 


        /// 
        ///  
        /// 
        public override bool Equals(object obj) { 
            if (obj == this) { 
                return true;
            } 

            ParseChildrenAttribute pca = obj as ParseChildrenAttribute;
            if (pca != null) {
                if (_childrenAsProps == false) { 
                    return pca.ChildrenAsProperties == false &&
                        pca._childControlType == _childControlType; 
                } 
                else {
                    return pca.ChildrenAsProperties && (DefaultProperty.Equals(pca.DefaultProperty)); 
                }
            }
            return false;
        } 

 
        ///  
        /// 
        ///  
        public override bool IsDefaultAttribute() {
            return this.Equals(Default);
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ParseChildrenAsPropertiesAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

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