81 lines
2.5 KiB
C#
81 lines
2.5 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="DataObjectFieldAttribute.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.ComponentModel {
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using System;
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using System.Security.Permissions;
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/// <devdoc>
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/// Represents a field of a DataObject. Use this attribute on a field to indicate
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/// properties such as primary key, identity, nullability, and length.
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/// </devdoc>
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[AttributeUsage(AttributeTargets.Property)]
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public sealed class DataObjectFieldAttribute : Attribute {
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private bool _primaryKey;
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private bool _isIdentity;
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private bool _isNullable;
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private int _length;
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public DataObjectFieldAttribute(bool primaryKey) : this(primaryKey, false, false, -1) {
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}
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public DataObjectFieldAttribute(bool primaryKey, bool isIdentity) : this(primaryKey, isIdentity, false, -1) {
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}
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public DataObjectFieldAttribute(bool primaryKey, bool isIdentity, bool isNullable) : this(primaryKey, isIdentity, isNullable, -1){
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}
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public DataObjectFieldAttribute(bool primaryKey, bool isIdentity, bool isNullable, int length) {
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_primaryKey = primaryKey;
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_isIdentity = isIdentity;
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_isNullable = isNullable;
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_length = length;
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}
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public bool IsIdentity {
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get {
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return _isIdentity;
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}
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}
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public bool IsNullable {
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get {
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return _isNullable;
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}
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}
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public int Length {
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get {
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return _length;
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}
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}
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public bool PrimaryKey {
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get {
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return _primaryKey;
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}
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}
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public override bool Equals(object obj) {
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if (obj == this) {
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return true;
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}
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DataObjectFieldAttribute other = obj as DataObjectFieldAttribute;
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return (other != null) &&
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(other.IsIdentity == IsIdentity) &&
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(other.IsNullable == IsNullable) &&
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(other.Length == Length) &&
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(other.PrimaryKey == PrimaryKey);
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}
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public override int GetHashCode() {
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return base.GetHashCode();
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}
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}
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}
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