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在C#中,元數(shù)據(jù)主要通過(guò)特性(Attribute)來(lái)實(shí)現(xiàn)
System.Attribute
基類(lèi),并根據(jù)需要添加屬性和方法。例如,可以創(chuàng)建一個(gè)名為DescriptionAttribute
的特性類(lèi),用于存儲(chǔ)描述信息:using System;
[AttributeUsage(AttributeTargets.All)]
public class DescriptionAttribute : Attribute
{
public string Description { get; private set; }
public DescriptionAttribute(string description)
{
Description = description;
}
}
DescriptionAttribute
應(yīng)用到一個(gè)類(lèi)或方法上:[Description("This is a sample class")]
public class SampleClass
{
[Description("This is a sample method")]
public void SampleMethod()
{
// ...
}
}
DescriptionAttribute
:using System;
using System.Reflection;
public static string GetDescription(MemberInfo memberInfo)
{
var attribute = memberInfo.GetCustomAttribute<DescriptionAttribute>();
return attribute?.Description;
}
using System;
using System.Reflection;
public static void ListDescriptions(Assembly assembly)
{
foreach (var type in assembly.GetTypes())
{
var typeDescription = GetDescription(type);
if (typeDescription != null)
{
Console.WriteLine($"Type: {type.FullName}, Description: {typeDescription}");
}
foreach (var member in type.GetMembers())
{
var memberDescription = GetDescription(member);
if (memberDescription != null)
{
Console.WriteLine($"Member: {member.Name}, Description: {memberDescription}");
}
}
}
}
這樣,就可以在C#代碼庫(kù)中維護(hù)元數(shù)據(jù)了。請(qǐng)注意,這里的示例僅用于演示目的,實(shí)際項(xiàng)目中可能需要根據(jù)需求進(jìn)行調(diào)整。
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