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public enum QuestionType {     Text=0,    MultipleChoice=1 }

第1:请定义一个接口IQuestion,有【标题】和【问题种类】两个属性,其中【问题种类】是只读的枚举类型QuestionType,另外还有一个方法获取该问题的答案(无参,返回字符串)。

 

interface IQuestion    {        string QuestionTitle { get; set; }        QuestionType QuestionType { get; set; }        string GetAnswer();           }

第2:请定义一个抽象类QuestionBase,实现第一题中的IQuestion接口,其中【问题种类】属性不在该抽象类中实现,而留在该抽象类的子类中实现;获取答案的方法有默认实现,返回字符串“默认答案”。

abstract class QuestionBase : IQuestion    {        string IQuestion.QuestionTitle { get; set; }        public abstract QuestionType QuestionType { get; set; }        public virtual string GetAnswer()        {            return "Default answer";        }    }

子类

class OneQuestion : QuestionBase    {        public QuestionType QuestionOneType;        public override QuestionType QuestionType        {            get { return QuestionOneType; }            set { QuestionOneType = value; }        }    }

第3:请定义一个TextQuestion类,继承自第2题中的QuestionBase;获取答案的方法返回字符串”文本答案”。再定义一个MultipleChoiceQuestion类,继承自第2题中的QuestionBase;获取答案的方法返回字符串”单选答案”。

class TextQuestion : QuestionBase {        public QuestionType QuestionOneType;        public override QuestionType QuestionType        {            get { return QuestionOneType; }            set { QuestionOneType = value; }        }        public override string GetAnswer()        {            return "Text Answer";        }    }    class MultipleChoiceQuestion : QuestionBase {        public QuestionType QuestionOneType;        public override QuestionType QuestionType        {            get { return QuestionOneType; }            set { QuestionOneType = value; }        }        public override string GetAnswer()        {            return "Sigle choice Answer";        }    }

第4:假设有实体类Product定义如下:

public  class Product    {      public string Name { get; set; }      public string IsDeleted { get; set; }    }

现在有一个方法从IQueryable<Product>中获取没有删除的Product列表,该方法实现如下:

public List<Product> GetActiveProducts(IQueryable<Product> query) {            return query.WhereNotDeleted().ToList();        }

 

请完成扩展方法:WhereNotDeleted

static class Extener    {        public static IQueryable<Product> WhereNotDeleted(this IQueryable<Product> query)        {            query = query.Where(t => t.IsDeleted == "NO");            return query;        }    }

第5:假设数据库中有User和Income两张表如下,请仔细分析下方的示例数据,然后写出SQL得到右方的查询结果。

SELECTb.`Name`,a.`Year`,a.`Month`,SUM(a.Amount) as "Income"FROMincome  a LEFT JOIN`user` bon a.UserId=b.IdGROUP BYa.`Month`,b.`Name`

第6题:根据第5题的数据结构,有如下两个实体类和查询结果类的定义:

public class User{    public int Id { get; set; }    public string Name { get; set; }}public class Income{    public int Id { get; set; }    public int UserId { get; set; }    public decimal Amount { get; set; }    public int Year { get; set; }    public int Month { get; set; }}public class UserIncomeDto{    public string Name { get; set; }    public int Year { get; set; }    public int Month { get; set; }    public decimal Income { get; set; }}

现有一个方法用LINQ的方式得到第5题的查询结果,该方法定义如下:

public List<UserIncomeDto> GetUserIncomeDtos(IQueryable<User> users, IQueryable<Income> incomes) {     throw new NotImplementedException(); }

请完成该方法的实现。

待定。。。。。。。。。

 

 

第7:在ASP.NET MVC应用程序中,假设有如下HTML表单:

<form action="/admin/mobile/user/login">     <input type="text" placeholder="username"/>    <input type="password" placeholder="password"/>     <input type="submit" value="login"/></form>
当该表单同步提交的时候,如何修改以上HTML和路由配置以使该请求进入下方的action中:
public class UserController : Controller{    [HttpPost]    public ActionResult Login(string username, string password)    {        throw new NotImplementedException();    }}

待定。。。。

第8题:请看如下代码:

public class Product{    public string Name { get; set; }    public string Description { get; set; }    public void Validate1()    {        if (string.IsNullOrEmpty(this.Name))        {            throw new Exception("please enter a name for the product");        }        if (string.IsNullOrEmpty(this.Description))        {            throw new Exception("product description is required");        }    }    public void Validate2()    {        this.Require(x => x.Name, "please enter a name for the product");        this.Require(x => x.Description, "product description is required");    }}

请完成Validate2方法中Require方法的定义和实现,从而使得Validate2与Validate1方法实现同样的效果。

class Products    {        public string Name { get; set; }        public string Description { get; set; }        public void Validate1()        {            if (string.IsNullOrEmpty(this.Name))            {                throw new Exception("please enter a name for the product");            }            if (string.IsNullOrEmpty(this.Description))            {                throw new Exception("product description is required");            }        }        public void Validate2()        {            this.Require(x => x.Name, "please enter a name for the product");            this.Require(x => x.Description, "product description is required");                    }        public void Require(Func<Products,string> func, string s2) {         
if (string.IsNullOrEmpty(func(this))) { throw new Exception(s2); } } }

原题的地址。。。http://www.cnblogs.com/leotsai/p/aspnet-tests-for-juniors.html#!comments

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