CSharp: Facade Pattern in donet 6

 

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/// <summary>   ///  外观模式 Facade Pattern   ///  银行   /// </summary>   public class Bank   {       public bool IsUntrustworthy(Customer customer, decimal loanAmount)       {           Console.WriteLine($"检查客户的信用状况: {customer.Name}");             return false;       }   }     /// <summary>   ///  外观模式 Facade Pattern   ///  信用卡   /// </summary>   public class Credit   {       public bool HasBadCredit(Customer customer)       {           Console.WriteLine($"为客户检查信用: {customer.Name}");             return false;       }   }     /// <summary>   ///  外观模式 Facade Pattern   ///  客户   /// </summary>   public class Customer   {         /// <summary>       ///       /// </summary>       public string Name { get; set; } = string.Empty;   }     /// <summary>   ///  外观模式 Facade Pattern   ///  客户服务   /// </summary>   public class CustomerService   {         /// <summary>       /// 查找客户       /// </summary>       /// <param name="name"></param>       /// <returns></returns>       public Customer Find(string name) =>           new() { Name = name };   }     /// <summary>   ///  外观模式 Facade Pattern   ///  贷款   /// </summary>   public class Loan   {         /// <summary>       ///       /// </summary>       /// <param name="customer"></param>       /// <returns></returns>       public bool HasBadLoans(Customer customer)       {           Console.WriteLine($"为客户检查贷款: {customer.Name}");             return false;       }   }   /// <summary>   ///  外观模式 Facade Pattern   /// </summary>   public class Mortgage   {         /// <summary>       /// 银行       /// </summary>       private readonly Bank _bank;       /// <summary>       /// 贷款       /// </summary>               private readonly Loan _loan;       /// <summary>       /// 信用卡       /// </summary>       private readonly Credit _credit;       /// <summary>       /// 客户服务       /// </summary>       private readonly CustomerService _customerService;       /// <summary>       ///       /// </summary>       public Mortgage()       {           _bank = new Bank();           _loan = new Loan();           _credit = new Credit();           _customerService = new CustomerService();       }       /// <summary>       ///       /// </summary>       /// <param name="customerName"></param>       /// <param name="loanAmount"></param>       /// <returns></returns>       public bool IsEligible(string customerName, decimal loanAmount)       {           Console.WriteLine($"客户 {customerName} 想申请贷款 {loanAmount:C} .\n");             var customer = _customerService.Find(customerName);             if (_bank.IsUntrustworthy(customer, loanAmount))           {               return false;           }             if (_loan.HasBadLoans(customer))           {               return false;           }             if (_credit.HasBadCredit(customer))           {               return false;           }             return true;       }   }   /// <summary>   /// 外观模式 Facade Pattern   /// 抵押贷款   /// </summary>   public static class MortgageExecutor   {         /// <summary>       ///       /// </summary>       public static void Execute()       {           ConsoleExtension.WriteSeparator("外观模式 Facade Pattern--Mortgage demo");             var mortgage = new Mortgage();           const string customerName = "Geovin Du";             // Evaluate mortgage eligibility for the customer.           var isEligible = mortgage.IsEligible(customerName, 125000);             var status = isEligible ? "批准" : "拒绝";           Console.WriteLine($"抵押贷款给 {customerName} 已经 {status}.");       }   }

　　

调用：

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1	Geovin.Du.DuFacade.DuMortgage.MortgageExecutor.Execute();

　　

输出：

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Hello, Geovin Du! 学习 .net 6   外观模式 Facade Pattern--Mortgage demo -------------------------------------------------- 客户 Geovin Du 想申请贷款 ￥125,000.00 .   检查客户的信用状况: Geovin Du 为客户检查贷款: Geovin Du 为客户检查信用: Geovin Du 抵押贷款给 Geovin Du 已经 批准.