DataObjectFieldAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / DataObjectFieldAttribute.cs / 1 / DataObjectFieldAttribute.cs
                        

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

namespace System.ComponentModel { 
 
    using System;
    using System.Security.Permissions; 

    /// 
    /// Represents a field of a DataObject. Use this attribute on a field to indicate
    /// properties such as primary key, identity, nullability, and length. 
    /// 
    [AttributeUsage(AttributeTargets.Property)] 
    public sealed class DataObjectFieldAttribute : Attribute { 
        private bool _primaryKey;
        private bool _isIdentity; 
        private bool _isNullable;
        private int _length;

        public DataObjectFieldAttribute(bool primaryKey) : this(primaryKey, false, false, -1) { 
        }
 
        public DataObjectFieldAttribute(bool primaryKey, bool isIdentity) : this(primaryKey, isIdentity, false, -1) { 
        }
 
        public DataObjectFieldAttribute(bool primaryKey, bool isIdentity, bool isNullable) : this(primaryKey, isIdentity, isNullable, -1){
        }

        public DataObjectFieldAttribute(bool primaryKey, bool isIdentity, bool isNullable, int length) { 
            _primaryKey = primaryKey;
            _isIdentity = isIdentity; 
            _isNullable = isNullable; 
            _length = length;
        } 

        public bool IsIdentity {
            get {
                return _isIdentity; 
            }
        } 
 
        public bool IsNullable {
            get { 
                return _isNullable;
            }
        }
 
        public int Length {
            get { 
                return _length; 
            }
        } 

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

            DataObjectFieldAttribute other = obj as DataObjectFieldAttribute; 
            return (other != null) &&
                (other.IsIdentity == IsIdentity) && 
                (other.IsNullable == IsNullable) && 
                (other.Length == Length) &&
                (other.PrimaryKey == PrimaryKey); 
        }

        public override int GetHashCode() {
            return base.GetHashCode(); 
        }
    } 
}

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