当位掩码（标志）枚举变得太大时该怎么办

Question

我的应用程序中有一组非常大的权限，我用 Flags 枚举来表示。 它正在快速接近长数据类型的实际上限。 我被迫想出一个策略，尽快过渡到不同的结构。 现在，我可以将此列表分解为更小的部分，但是，根据我们的应用程序布局，这已经只是我们应用程序总体权限的子集。 在管理权限时，我们广泛使用这种区别来显示目的，如果可以避免的话，我宁愿此时不必重新访问该代码。

还有其他人遇到过这个问题吗？ 你是怎么熬过去的？ 一般示例很好，但我最感兴趣的是 c# 特定示例，如果我可以使用任何特定于语言的技巧来完成工作。

可能不是必需的，但这里是当前为我正在处理的应用程序部分定义的权限列表。

//Subgroup WebAgent
[Flags]
public enum WebAgentPermission : long
{
    [DescriptionAttribute("View Rule Group")]
    ViewRuleGroup = 1,
    [DescriptionAttribute("Add Rule Group")]
    AddRuleGroup = 2,
    [DescriptionAttribute("Edit Rule Group")]
    EditRuleGroup = 4,
    [DescriptionAttribute("Delete Rule Group")]
    DeleteRuleGroup = 8,
    [DescriptionAttribute("View Rule")]
    ViewRule = 16,
    [DescriptionAttribute("Add Rule")]
    AddRule = 32,
    [DescriptionAttribute("Edit Rule")]
    EditRule = 64,
    [DescriptionAttribute("Delete Rule")]
    DeleteRule = 128,
    [DescriptionAttribute("View Location")]
    ViewLocation = 256,
    [DescriptionAttribute("Add Location")]
    AddLocation = 512,
    [DescriptionAttribute("Edit Location")]
    EditLocation = 1024,
    [DescriptionAttribute("Delete Location")]
    DeleteLocation = 2048,
    [DescriptionAttribute("View Volume Statistics")]
    ViewVolumeStatistics = 4096,
    [DescriptionAttribute("Edit Volume Statistics")]
    EditVolumeStatistics = 8192,
    [DescriptionAttribute("Upload Volume Statistics")]
    UploadVolumeStatistics = 16384,
    [DescriptionAttribute("View Role")]
    ViewRole = 32768,
    [DescriptionAttribute("Add Role")]
    AddRole = 65536,
    [DescriptionAttribute("Edit Role")]
    EditRole = 131072,
    [DescriptionAttribute("Delete Role")]
    DeleteRole = 262144,
    [DescriptionAttribute("View User")]
    ViewUser = 524288,
    [DescriptionAttribute("Add User")]
    AddUser = 1048576,
    [DescriptionAttribute("Edit User")]
    EditUser = 2097152,
    [DescriptionAttribute("Delete User")]
    DeleteUser = 4194304,
    [DescriptionAttribute("Assign Permissions To User")]
    AssignPermissionsToUser = 8388608,
    [DescriptionAttribute("Change User Password")]
    ChangeUserPassword = 16777216,
    [DescriptionAttribute("View Audit Logs")]
    ViewAuditLogs = 33554432,
    [DescriptionAttribute("View Team")]
    ViewTeam = 67108864,
    [DescriptionAttribute("Add Team")]
    AddTeam = 134217728,
    [DescriptionAttribute("Edit Team")]
    EditTeam = 268435456,
    [DescriptionAttribute("Delete Team")]
    DeleteTeam = 536870912,
    [DescriptionAttribute("View Web Agent Reports")]
    ViewWebAgentReports = 1073741824,
    [DescriptionAttribute("View All Locations")]
    ViewAllLocations = 2147483648,
    [DescriptionAttribute("Access to My Search")]
    AccessToMySearch = 4294967296,
    [DescriptionAttribute("Access to Pespective Search")]
    AccessToPespectiveSearch = 8589934592,
    [DescriptionAttribute("Add Pespective Search")]
    AddPespectiveSearch = 17179869184,
    [DescriptionAttribute("Edit Pespective Search")]
    EditPespectiveSearch = 34359738368,
    [DescriptionAttribute("Delete Pespective Search")]
    DeletePespectiveSearch = 68719476736,
    [DescriptionAttribute("Access to Search")]
    AccessToSearch = 137438953472,
    [DescriptionAttribute("View Form Roles")]
    ViewFormRole = 274877906944,
    [DescriptionAttribute("Add / Edit Form Roles")]
    AddFormRole = 549755813888,
    [DescriptionAttribute("Delete UserFormRolesDifferenceMasks")]
    DeleteFormRole = 1099511627776,
    [DescriptionAttribute("Export Locations")]
    ExportLocations = 2199023255552,
    [DescriptionAttribute("Import Locations")]
    ImportLocations = 4398046511104,
    [DescriptionAttribute("Manage Location Levels")]
    ManageLocationLevels = 8796093022208,
    [DescriptionAttribute("View Job Title")]
    ViewJobTitle = 17592186044416,
    [DescriptionAttribute("Add Job Title")]
    AddJobTitle = 35184372088832,
    [DescriptionAttribute("Edit Job Title")]
    EditJobTitle = 70368744177664,
    [DescriptionAttribute("Delete Job Title")]
    DeleteJobTitle = 140737488355328,
    [DescriptionAttribute("View Dictionary Manager")]
    ViewDictionaryManager = 281474976710656,
    [DescriptionAttribute("Add Dictionary Manager")]
    AddDictionaryManager = 562949953421312,
    [DescriptionAttribute("Edit Dictionary Manager")]
    EditDictionaryManager = 1125899906842624,
    [DescriptionAttribute("Delete Dictionary Manager")]
    DeleteDictionaryManager = 2251799813685248,
    [DescriptionAttribute("View Choice Manager")]
    ViewChoiceManager = 4503599627370496,
    [DescriptionAttribute("Add Choice Manager")]
    AddChoiceManager = 9007199254740992,
    [DescriptionAttribute("Edit Chioce Manager")]
    EditChoiceManager = 18014398509481984,
    [DescriptionAttribute("Delete Choice Manager")]
    DeleteChoiceManager = 36028797018963968,
    [DescriptionAttribute("Import Export Choices")] //57
    ImportExportChoices = 72057594037927936
}

Answer 1

我在那里看到了至少几个不同枚举的值...

我的第一个想法是通过将权限拆分为逻辑组来解决问题（RuleGroupPermissions、RulePermissions 、LocationPermissions、...），然后使用一个类 (WebAgentPermissions) 公开每个权限枚举类型的属性。

由于权限值看起来是重复的，因此您最终可能会使用单个枚举：

[Flags]
public enum Permissions
{
    View = 1,
    Add = 2,
    Edit = 4,
    Delete = 8
}

然后让 WebAgentPermissions 类为要设置权限的每个区域公开一个属性；

class WebAgentPermissions
{
    public Permissions RuleGroup { get; set; }
    public Permissions Rule { get; set; }
    public Permissions Location { get; set; }
    // and so on...
}

Answer 2

语言文档说：

http://msdn.microsoft.com/en-us /library/system.flagsattribute.aspx

“底层类型是 Int32，因此最大单位标志是 1073741824，显然每个枚举总共有 32 个标志。”

然而...更新：

评论者是正确的。 看看这个：

http://msdn.microsoft.com/ en-us/library/ms182147(VS.80).aspx

Int32 只是默认数据类型！ 事实上你可以指定Int64。

public enum MyEnumType : Int64

...最多允许 64 个值。 但这似乎是最大的，之后你将考虑重新设计。 由于不太了解您的解决方案的其余部分，我无法确切地说出什么可能适合。 但特权标识符数组（或哈希映射）可能是最自然的方法。

Answer 3

不是对您问题的答案，而是相关的建议：我们使用位移来指定数值，如下所示：

[Flags]
public enum MyEnumFlags : Int64
{
    None = 0,
    A = 1 << 0,
    B = 1 << 1,
    C = 1 << 2,
    D = 1 << 3,
    E = 1 << 4,
    F = 1 << 5,
    ...etc...

对于前十个不太重要，但之后它变得非常方便。

Answer 4

事实证明，这是一个比我想象的更常见的问题，我将 CSS 类表示为标志类型，并且存在超过 64 种可能性。 我从这个过程中学到了所有东西，并将其转变为可重用的模式，尽管因为它是一个结构，但它是一个复制粘贴类型的模式。

这是 BigFlags“枚举类型”。 它使用 System.Numerics 中的 BigInteger，或者如果您无法引用该程序集，则可以使用 BitArray 进行回退只需关闭 NUMERICS 预处理器指令即可。

它的行为非常像 Flags 枚举，甚至定义诸如 HasFlag(...)、GetNames()、GetValues( )、TryParse(...)、TypeConverter、IConvertible 等。因为它确实定义了 TypeConverter 和 IConvertible，它也适合存储在数据存储中，尽管始终作为字符串或文本数据类型。

您将“enum”值公开为public static readonly 成员。 组合枚举值作为仅获取属性公开。

要使用它，请复制并粘贴代码，然后进行搜索并将 BigFlags 替换为您的结构名称，然后删除 TODO 部分中的枚举并添加您的值。

希望有人觉得它有用。

#define NUMERICS

using System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
#if NUMERICS
using System.Numerics;
#endif
using System.Reflection;
using System.Text;
using System.Threading.Tasks;


namespace Aim
{
    /// <summary>
    /// The BigFlags struct behaves like a Flags enumerated type.
    /// <para>
    /// Note that if this struct will be stored in some type of data
    /// store, it should be stored as a string type. There are two
    /// reasons for this:
    /// </para>
    /// <para>
    /// 1. Presumably, this pattern is being used because the number
    /// of values will exceed 64 (max positions in a long flags enum).
    /// Since this is so, there is in any case no numeric type which
    /// can store all the possible combinations of flags.
    /// </para>
    /// <para>
    /// 2. The "enum" values are assigned based on the order that the
    /// static public fields are defined. It is much safer to store
    /// these fields by name in case the fields are rearranged. This
    /// is particularly important if this represents a permission set!
    /// </para>
    /// </summary>
    [
    TypeConverter( typeof( BigFlagsConverter ) )
    ]
    public struct BigFlags : IEquatable<BigFlags>,
        IComparable<BigFlags>, IComparable, IConvertible
    {
        #region State...

        private static readonly List<FieldInfo> Fields;
        private static readonly List<BigFlags> FieldValues;
#if NUMERICS
        private static readonly bool ZeroInit = true;
        private BigInteger Value;

        /// <summary>
        /// Creates a value taking ZeroInit into consideration.
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        private static BigInteger CreateValue( int index )
        {
            if( ZeroInit && index == 0 )
            {
                return 0;
            }
            int idx = ZeroInit ? index - 1 : index;

            return new BigInteger( 1 ) << idx;
        }
#else
        private BitArray Array;

        /// <summary>
        /// Lazy-initialized BitArray.
        /// </summary>
        private BitArray Bits
        {
            get
            {
                if( null == Array )
                {
                    Array = new BitArray( Fields.Count );
                }
                return Array;
            }
        }
#endif
        #endregion ...State

        #region Construction...

        /// <summary>
        /// Static constructor. Sets the static public fields.
        /// </summary>
        static BigFlags()
        {
            Fields = typeof( BigFlags ).GetFields(
                BindingFlags.Public | BindingFlags.Static ).ToList();
            FieldValues = new List<BigFlags>();
            for( int i = 0; i < Fields.Count; i++ )
            {
                var field = Fields[i];
                var fieldVal = new BigFlags();
#if NUMERICS
                fieldVal.Value = CreateValue( i );
#else
                fieldVal.Bits.Set( i, true );
#endif
                field.SetValue( null, fieldVal );
                FieldValues.Add( fieldVal );
            }
        }
        #endregion ...Construction

        #region Operators...

        /// <summary>
        /// OR operator. Or together BigFlags instances.
        /// </summary>
        /// <param name="lhs"></param>
        /// <param name="rhs"></param>
        /// <returns></returns>
        public static BigFlags operator |( BigFlags lhs, BigFlags rhs )
        {
            var result = new BigFlags();
#if NUMERICS
            result.Value = lhs.Value | rhs.Value;
#else
            // BitArray is modified in place - always copy!
            result.Array = new BitArray( lhs.Bits ).Or( rhs.Bits );
#endif

            return result;
        }

        /// <summary>
        /// AND operator. And together BigFlags instances.
        /// </summary>
        /// <param name="lhs"></param>
        /// <param name="rhs"></param>
        /// <returns></returns>
        public static BigFlags operator &( BigFlags lhs, BigFlags rhs )
        {
            var result = new BigFlags();
#if NUMERICS
            result.Value = lhs.Value & rhs.Value;
#else
            // BitArray is modified in place - always copy!
            result.Array = new BitArray( lhs.Bits ).And( rhs.Bits );
#endif

            return result;
        }

        /// <summary>
        /// XOR operator. Xor together BigFlags instances.
        /// </summary>
        /// <param name="lhs"></param>
        /// <param name="rhs"></param>
        /// <returns></returns>
        public static BigFlags operator ^( BigFlags lhs, BigFlags rhs )
        {
            var result = new BigFlags();
#if NUMERICS
            result.Value = lhs.Value ^ rhs.Value;
#else
            // BitArray is modified in place - always copy!
            result.Array = new BitArray( lhs.Bits ).Xor( rhs.Bits );
#endif

            return result;
        }

        /// <summary>
        /// Equality operator.
        /// </summary>
        /// <param name="lhs"></param>
        /// <param name="rhs"></param>
        /// <returns></returns>
        public static bool operator ==( BigFlags lhs, BigFlags rhs )
        {
            return lhs.Equals( rhs );
        }

        /// <summary>
        /// Inequality operator.
        /// </summary>
        /// <param name="lhs"></param>
        /// <param name="rhs"></param>
        /// <returns></returns>
        public static bool operator !=( BigFlags lhs, BigFlags rhs )
        {
            return !( lhs == rhs );
        }
        #endregion ...Operators

        #region System.Object Overrides...

        /// <summary>
        /// Overridden. Returns a comma-separated string.
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
#if NUMERICS
            if( ZeroInit && Value == 0 )
            {
                return Fields[0].Name;
            }
#endif
            var names = new List<string>();
            for( int i = 0; i < Fields.Count; i++ )
            {
#if NUMERICS
                if( ZeroInit && i == 0 )
                    continue;

                var bi = CreateValue( i );
                if( ( Value & bi ) ==  bi )
                    names.Add( Fields[i].Name );
#else
                if( Bits[i] )
                    names.Add( Fields[i].Name );
#endif
            }

            return String.Join( ", ", names );
        }

        /// <summary>
        /// Overridden. Compares equality with another object.
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public override bool Equals( object obj )
        {
            if( obj is BigFlags )
            {
                return Equals( (BigFlags)obj );
            }

            return false;
        }

        /// <summary>
        /// Overridden. Gets the hash code of the internal BitArray.
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
#if NUMERICS
            return Value.GetHashCode();
#else
            int hash = 17;
            for( int i = 0; i < Bits.Length; i++ )
            {
                if( Bits[i] )
                    hash ^= i;
            }

            return hash;
#endif
        }
        #endregion ...System.Object Overrides

        #region IEquatable<BigFlags> Members...

        /// <summary>
        /// Strongly-typed equality method.
        /// </summary>
        /// <param name="other"></param>
        /// <returns></returns>
        public bool Equals( BigFlags other )
        {
#if NUMERICS
            return Value == other.Value;
#else
            for( int i = 0; i < Bits.Length; i++ )
            {
                if( Bits[i] != other.Bits[i] )
                    return false;
            }

            return true;
#endif
        }
        #endregion ...IEquatable<BigFlags> Members

        #region IComparable<BigFlags> Members...

        /// <summary>
        /// Compares based on highest bit set. Instance with higher
        /// bit set is bigger.
        /// </summary>
        /// <param name="other"></param>
        /// <returns></returns>
        public int CompareTo( BigFlags other )
        {
#if NUMERICS
            return Value.CompareTo( other.Value );
#else
            for( int i = Bits.Length - 1; i >= 0; i-- )
            {
                bool thisVal = Bits[i];
                bool otherVal = other.Bits[i];
                if( thisVal && !otherVal )
                    return 1;
                else if( !thisVal && otherVal )
                    return -1;
            }

            return 0;
#endif
        }
        #endregion ...IComparable<BigFlags> Members

        #region IComparable Members...

        int IComparable.CompareTo( object obj )
        {
            if( obj is BigFlags )
            {
                return CompareTo( (BigFlags)obj );
            }

            return -1;
        }
        #endregion ...IComparable Members

        #region IConvertible Members...

        /// <summary>
        /// Returns TypeCode.Object.
        /// </summary>
        /// <returns></returns>
        public TypeCode GetTypeCode()
        {
            return TypeCode.Object;
        }

        bool IConvertible.ToBoolean( IFormatProvider provider )
        {
            throw new NotSupportedException();
        }

        byte IConvertible.ToByte( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToByte( Value );
#else
            throw new NotSupportedException();
#endif
        }

        char IConvertible.ToChar( IFormatProvider provider )
        {
            throw new NotSupportedException();
        }

        DateTime IConvertible.ToDateTime( IFormatProvider provider )
        {
            throw new NotSupportedException();
        }

        decimal IConvertible.ToDecimal( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToDecimal( Value );
#else
            throw new NotSupportedException();
#endif
        }

        double IConvertible.ToDouble( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToDouble( Value );
#else
            throw new NotSupportedException();
#endif
        }

        short IConvertible.ToInt16( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToInt16( Value );
#else
            throw new NotSupportedException();
#endif
        }

        int IConvertible.ToInt32( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToInt32( Value );
#else
            throw new NotSupportedException();
#endif
        }

        long IConvertible.ToInt64( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToInt64( Value );
#else
            throw new NotSupportedException();
#endif
        }

        sbyte IConvertible.ToSByte( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToSByte( Value );
#else
            throw new NotSupportedException();
#endif
        }

        float IConvertible.ToSingle( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToSingle( Value );
#else
            throw new NotSupportedException();
#endif
        }

        string IConvertible.ToString( IFormatProvider provider )
        {
            return ToString();
        }

        object IConvertible.ToType( Type conversionType, IFormatProvider provider )
        {
            var tc = TypeDescriptor.GetConverter( this );

            return tc.ConvertTo( this, conversionType );
        }

        ushort IConvertible.ToUInt16( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToUInt16( Value );
#else
            throw new NotSupportedException();
#endif
        }

        uint IConvertible.ToUInt32( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToUInt32( Value );
#else
            throw new NotSupportedException();
#endif
        }

        ulong IConvertible.ToUInt64( IFormatProvider provider )
        {
#if NUMERICS
            return Convert.ToUInt64( Value );
#else
            throw new NotSupportedException();
#endif
        }
        #endregion ...IConvertible Members

        #region Public Interface...

        /// <summary>
        /// Checks <paramref name="flags"/> to see if all the bits set in
        /// that flags are also set in this flags.
        /// </summary>
        /// <param name="flags"></param>
        /// <returns></returns>
        public bool HasFlag( BigFlags flags )
        {
            return ( this & flags ) == flags;
        }

        /// <summary>
        /// Gets the names of this BigFlags enumerated type.
        /// </summary>
        /// <returns></returns>
        public static string[] GetNames()
        {
            return Fields.Select( x => x.Name ).ToArray();
        }

        /// <summary>
        /// Gets all the values of this BigFlags enumerated type.
        /// </summary>
        /// <returns></returns>
        public static BigFlags[] GetValues()
        {
            return FieldValues.ToArray();
        }

        /// <summary>
        /// Standard TryParse pattern. Parses a BigFlags result from a string.
        /// </summary>
        /// <param name="s"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public static bool TryParse( string s, out BigFlags result )
        {
            result = new BigFlags();
            if( String.IsNullOrEmpty( s ) )
                return true;

            var fieldNames = s.Split( ',' );
            foreach( var f in fieldNames )
            {
                var field = Fields.FirstOrDefault( x =>
                    String.Equals( x.Name, f.Trim(),
                    StringComparison.OrdinalIgnoreCase ) );
                if( null == field )
                {
                    result = new BigFlags();
                    return false;
                }
#if NUMERICS
                int i = Fields.IndexOf( field );
                result.Value |= CreateValue( i );
#else
                result.Bits.Set( Fields.IndexOf( field ), true );
#endif
            }

            return true;
        }

        //
        // Expose "enums" as public static readonly fields.
        // TODO: Replace this section with your "enum" values.
        //
        public static readonly BigFlags None;
        public static readonly BigFlags FirstValue;
        public static readonly BigFlags ValueTwo;
        public static readonly BigFlags ValueThree;
        public static readonly BigFlags ValueFour;
        public static readonly BigFlags ValueFive;
        public static readonly BigFlags ValueSix;
        public static readonly BigFlags LastValue;

        /// <summary>
        /// Expose flagged combinations as get-only properties.
        /// </summary>
        public static BigFlags FirstLast
        {
            get
            {
                return BigFlags.FirstValue | BigFlags.LastValue;
            }
        }
        #endregion ...Public Interface
    }

    /// <summary>
    /// Converts objects to and from BigFlags instances.
    /// </summary>
    public class BigFlagsConverter : TypeConverter
    {
        /// <summary>
        /// Can convert to string only.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="destinationType"></param>
        /// <returns></returns>
        public override bool CanConvertTo( ITypeDescriptorContext context,
            Type destinationType )
        {
            return destinationType == typeof( String );
        }

        /// <summary>
        /// Can convert from any object.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="sourceType"></param>
        /// <returns></returns>
        public override bool CanConvertFrom( ITypeDescriptorContext context,
            Type sourceType )
        {
            return true;
        }

        /// <summary>
        /// Converts BigFlags to a string.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="culture"></param>
        /// <param name="value"></param>
        /// <param name="destinationType"></param>
        /// <returns></returns>
        public override object ConvertTo( ITypeDescriptorContext context,
            CultureInfo culture, object value, Type destinationType )
        {
            if( value is BigFlags && CanConvertTo( destinationType ) )
                return value.ToString();

            return null;
        }

        /// <summary>
        /// Attempts to parse <paramref name="value"/> and create and
        /// return a new BigFlags instance.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="culture"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public override object ConvertFrom( ITypeDescriptorContext context,
            CultureInfo culture, object value )
        {
            var s = Convert.ToString( value );
            BigFlags result;
            BigFlags.TryParse( s, out result );

            return result;
        }
    }
}

Answer 5

您可以检查 BitArray 类。 也许你将来会用到它。

Answer 6

在 C# 中，表示类似于枚举但更灵活的值的一种灵活方法是将其表示为具有可用预定义值的静态类，如下所示

public sealed class WebAgentPermission
{
    private long ID;

    public static readonly WebAgentPermission
        ViewRuleGroup = new WebAgentPermission { ID = 1 };
    public static readonly WebAgentPermission
        AddRuleGroup  = new WebAgentPermission { ID = 2 };

    private WebAgentPermission() { } 

    // considerations: override equals/gethashcode, probably override tostring,
    // maybe implicit cast to/from long, maybe other stuff
}

： 看起来你可以，如果你真的尝试过的话。

Answer 7

如果我控制这个应用程序，我可能会想出一组通用的权限（查看、添加、编辑、删除、上传/导入）和一组资源（用户、角色、规则等）。 在网页上找到与该页面关联的资源类型，然后检查权限。 也许是这样的：

Permissions perms = agent.GetPermissions(ResourceType.User);
if((perms & Permissions.View) == Permissions.View) { /* do work */ }

或者

Permissions perms = agent.Permissions[ResourceType.User];
if((perms & Permissions.View) == Permissions.View) { /* do work */ }

甚至

if(agent.IsAuthorized(ResourceType.User, Permissions.View)) { /* do work */ }

您有一些与其他所有内容都没有意义的权限（仅举一个例子，将权限分配给用户）。 由于我对这个问题知之甚少，我不确定如何处理这个问题。

Answer 8

我没有遇到过这种情况。

这就是我的想法，为每个类别和类别创建单独的枚举。 接受这些作为参数。

RuleGroupPermission
    None = 0
    ViewRuleGroup = 1,
    AddRuleGroup = 2,
    EditRuleGroup = 4,
    DeleteRuleGroup = 8,

LocationOperations
    None = 0
    Add = 1
    View = 2
    Delete = 4

void setPermission(RuleGroupPermission ruleGroupOpsAllowed, LocationOperations locationOptions)
{
   ...
}

编辑：看看 messagebox.show 是如何做到的。 OK、OKCancel 与问题、信息、感叹分开。

Answer 9

对于面临类似问题的其他人，我建议 InfiniteEnumFlags 库，
它具有所有 dotnet 枚举标志功能以及更多功能。

Answer 10

怎么样...在列表中拥有权限？

它们可以在程序启动时从数据库加载，并且无需重新部署系统即可进行修改！

public class Permission
{
    public string Description;
    public string Code;
    public bool IsSet;
}

List<Permission> permissions;