43 lines
861 B
C#
43 lines
861 B
C#
using System;
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using System.Reflection;
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namespace WxOrder.Framework;
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/// <summary>
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/// 单例，需要在当前类中定义
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class SingleInstance<T> where T : class
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{
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private static readonly object lockObj = new();
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private static T mySelf;//= default(T);
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public static T Instance
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{
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get
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{
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lock (lockObj)
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{
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mySelf ??= InstanceCreator.CreateInstance<T>();
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}
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return mySelf;
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}
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}
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}
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public static class InstanceCreator
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{
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public static T CreateInstance<T>()
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{
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Type type = typeof(T);
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try
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{
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return (T)type.Assembly.CreateInstance(type.FullName, true, BindingFlags.NonPublic | BindingFlags.Instance, null, null, null, null);
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}
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catch (MissingMethodException ex)
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{
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throw new Exception($"{ex.Message}\n(单例模式下，构造函数必须为 private)");
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}
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}
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}
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