ControlValuePropertyAttribute.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 / Web / UI / ControlValuePropertyAttribute.cs / 1305376 / ControlValuePropertyAttribute.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI { 
    using System; 
    using System.ComponentModel;
    using System.Diagnostics; 
    using System.Security.Permissions;
    using System.Web.Util;

    ///  
    /// Specifies the default value property for a control.
    ///  
    [AttributeUsage(AttributeTargets.Class)] 
    public sealed class ControlValuePropertyAttribute : Attribute {
        private readonly string _name; 
        private readonly object _defaultValue;


        ///  
        /// Initializes a new instance of the  class.
        ///  
        public ControlValuePropertyAttribute(string name) { 
            _name = name;
        } 

        /// 
        /// Initializes a new instance of the class, using the specified value as the default value.
        ///  
        public ControlValuePropertyAttribute(string name, object defaultValue) {
            _name = name; 
            _defaultValue = defaultValue; 
        }
 
        /// 
        /// Initializes a new instance of the class, converting the specified value to the
        /// specified type.
        ///  
        public ControlValuePropertyAttribute(string name, Type type, string defaultValue) {
            _name = name; 
            // The try/catch here is because attributes should never throw exceptions.  We would fail to 
            // load an otherwise normal class.
            try { 
                _defaultValue = TypeDescriptor.GetConverter(type).ConvertFromInvariantString(defaultValue);
            }
            catch {
                System.Diagnostics.Debug.Fail("ControlValuePropertyAttribute: Default value of type " + type.FullName + " threw converting from the string '" + defaultValue + "'."); 
            }
        } 
 

        ///  
        /// Gets the name of the default value property for the control this attribute is bound to.
        /// 
        public string Name {
            get { 
                return _name;
            } 
        } 

        ///  
        /// Gets the value of the default value property for the control this attribute is bound to.
        /// 
        public object DefaultValue {
            get { 
                return _defaultValue;
            } 
        } 

 

        public override bool Equals(object obj) {
            ControlValuePropertyAttribute other = obj as ControlValuePropertyAttribute;
 
            if (other != null) {
                if (String.Equals(_name, other.Name, StringComparison.Ordinal)) { 
                    if (_defaultValue != null) { 
                        return _defaultValue.Equals(other.DefaultValue);
                    } 
                    else {
                        return (other.DefaultValue == null);
                    }
                } 
            }
            return false; 
        } 

 
        public override int GetHashCode() {
            return System.Web.Util.HashCodeCombiner.CombineHashCodes(
                ((Name != null) ? Name.GetHashCode() : 0),
                ((DefaultValue != null) ? DefaultValue.GetHashCode() : 0)); 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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