C#在ASP.NET4.5框架下的首次网页应用

2023-08-18 10:35:40

运行效果预览:

先看实践应用要求:

1．编写一个函数，用于计算1！+2！+3！+4！+5！，在控制台或页面输出运行结果。

2．在控制台或页面输出九九乘法表。

3．输入10个以内的整数，输出该组整数的降序排列，要求采用数组实现。

4．计算两个数的商，在控制台或页面输出结果，要求包含异常处理。

5．定义一个汽车类，该类具有重量和速度属性；再定义一个跑车类，该类继承汽车类的属性，并拥有自己的颜色属性；然后声明一个汽车类的对象和一个跑车类的对象，并把它们的属性输出到控制台上。

6．假设某动物园管理员每天需要给他所负责饲养的狮子、猴子和鸽子喂食。请用一个程序来模拟他喂食的过程。

要求：

（1）饲养员喂食时，不同动物执行不同的吃的功能，例如狮子吃肉、猴子吃香蕉、鸽子吃大米等。

（2）饲养员喂动物时，不能使用判断语句判断动物类型。

（3）使用虚方法或抽象方法实现喂养不同动物的多态，不能使用方法重载。

提示：需要建一个动物类，动物类有一个虚的或抽象的吃方法，动物类下面有几个子类，不同的子类重写父类的吃方法。饲养员类提供喂食方法。然后，在Main方法中一一调用吃的方法。

前端practice.aspx源码:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="practice.aspx.cs" Inherits="practice" enableEventValidation="false"%>

<!DOCTYPE html>

<title>实验二 C#程序设计练习</title>

button{

width:120px;

height:30px;

background:#9933FA;

color:#fff;

}

button:hover{

background:#9A32CD;

}

div{

text-align:center;

}

h2{

text-align:center;

color:red;

}

span{

color:gray;

}

textarea{

width:900px;

height:400px;

font-size:20px;

}

</style>

</head>

<button id="Button1" onserverclick="factorial" runat="server">factorial</button>

<button id="Button2" onserverclick="multiplication" runat="server">multiplication</button>

<button id="Button3" onserverclick="bubbleSort" runat="server">bubbleSort</button>

<button id="Button4" onserverclick="division" runat="server">division</button>

</div>

<br />

输入参数：<asp:TextBox id="TextNumber" runat="server" OnTextChanged="bubbleBtnClick" AutoPostBack ="true"></asp:TextBox>   <asp:Label ID="eMesg_bubble" runat="server">10个以内整数,空格分隔,Enter/Tap键执行排序</asp:Label><br /><br />

</div>

输入被除数：<asp:TextBox id="textA" runat="server"></asp:TextBox>  

输入除数：<asp:TextBox id="textB" runat="server" OnTextChanged="divisionBtnClick" AutoPostBack ="true"></asp:TextBox> 

<asp:Label ID="eMesg_division" runat="server">Enter/Tap键执行计算</asp:Label><br /><br />

</div>

</div>

<div>

<textarea id="displayArea" runat="server" rows="1" cols="1">输出结果将在此处显示.......</textarea>

</div>

</form>

</body>

</html>

后端practice.aspx.cs源码:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class practice : System.Web.UI.Page {

protected void Page_Load(object sender, EventArgs e)

{

Response.Write("<h2>单击按钮分别显示各个练习题代码运行结果</h2>");

div_division.Visible = false;

div_bubble.Visible = false;

}

protected void factorial(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

div_view.InnerHtml = "Follow will calculate the union of \"1!+2!+3!+4!+5!\":";

}

factorial calculate = new factorial();

displayArea.InnerHtml = "1!+2!+3!+4!+5!=" + calculate.add().ToString();

}

protected void multiplication(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false; div_division.Visible = false;

}

int i, j;

displayArea.InnerHtml = ""; //擦除前一次对textarea的写入记录

for (i = 1; i < 10; i++)

{

for (j = 1; j <= i; j++)

{

displayArea.InnerHtml+=j+"*"+i+"="+(i * j)+"\t";

}

displayArea.InnerHtml += "\n";

}

protected void bubbleSort(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

div_bubble.Visible = true;

displayArea.InnerHtml = "bubbleSort";

}

protected void bubbleBtnClick(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

div_bubble.Visible = true;

String str=TextNumber.Text;

//String[] a=str.Split();//稍候再写,未完

/* int i = 0, j=1; int[] number = new int[12]; while (i < str.Length) { if (str[i].Equals(' ')) { i++; } else { number[j] = int.Parse (str[i].ToString ()); } } */

displayArea.InnerHtml = ""; //擦除前一次textarea输出记录

displayArea.InnerHtml =str;

}

protected void division(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

div_division.Visible = true;

displayArea.InnerHtml = "两数求商,输入被除数与除数后,按 Enter / Tap 键执行运算";

}

protected void divisionBtnClick(object sender,EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

float a = float.Parse(textA.Text);

float b = float.Parse(textB.Text);

float result;

div_division.Visible = true;

try

{

if (b == 0)

throw new Exception("Error:DivideByZeroException[除数为零]");

result = a / b;

displayArea.InnerHtml = a + "/" + b + "=";

displayArea.InnerHtml += a / b;

}

catch (Exception error)

{

eMesg_division.Text = error.Message;

}

protected void car(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

car cardemo = new car();

supercar supercardemo = new supercar();

cardemo.set(2500, 180);

displayArea.InnerHtml = "汽车类的质量：" + cardemo.weight + "Kg，汽车类的速度：" + cardemo.speed + "Km/h\n";

supercardemo.color = "red";

cardemo.set(2500, 180);

supercardemo.set(2000, 250);

displayArea.InnerHtml +="超跑类的重量:"+supercardemo.weight+"Kg,超跑类的速度:"+supercardemo.speed+"Km/h,超跑的颜色:"+supercardemo.color; }

protected void zoo(object sender, EventArgs e)

{

if (IsPostBack)

{

div_bubble.Visible = false;

div_division.Visible = false;

}

feeder feederdemo = new feeder();

animals animalsdemo = new animals();

String food = "null";

String foodmeat,foodbanana,foodrice,meat,banana,rice;

food = "meat";

foodmeat=feederdemo.feed(food);

animalsdemo = new lion();

meat=animalsdemo.eat();

displayArea.InnerHtml = foodmeat + "\n" + meat + "\n";

food = "banana";

foodbanana=feederdemo.feed(food);

animalsdemo = new monkey();

banana=animalsdemo.eat();

displayArea.InnerHtml += foodbanana + "\n" + banana + "\n";

food = "rice";

foodrice=feederdemo.feed(food);

animalsdemo = new pigeon();

rice=animalsdemo.eat();

displayArea.InnerHtml += foodrice + "\n" + rice + "\n";

//displayArea.InnerHtml = foodmeat + "\n" + meat + "\n" + foodbanana + "\n" + banana + "\n" + foodrice + "\n" + rice;

}

//1!+2!+3!+4!+5!

class factorial {

public int add()

{

int i = 1, temp = 1, sum = 0;

for (; i < 6; i++)

{

temp = i * temp;

sum = sum + temp;

}

return sum;

}

//bubbleSort

/* class bubbleSort {

public void sort(int n)

{

int i, j;

for (i = 1; i < n; i++)

{

for (j = i; j < n; j++)

{

if (a[i] > a[j])

{

a[0] = a[i]; a[i] = a[j]; a[j] = a[0];

}

} */

//car class

class car

{

public float weight;

public float speed;

public void set(float weight, float speed)

{

this.weight = weight;

this.speed = speed;

}

class supercar : car {

public String color;

}

//zoo

class feeder

{

public String feed(String food)

{

return (food);

}

class animals

{

public virtual String eat()

{

return "feed animals with food!";

}

class lion : animals

{

public override String eat()

{

return "\'狮子\'吃的是 meat ......";

}

class monkey : animals

{

public override String eat()

{

return "啾~,俺老孙来也,\'猴子\'就爱吃 banana ......";

}

class pigeon : animals

{

public override String eat()

{

return "听~,是\'鸽子\'在啄食 rice ......";

}

网页初次打开运行效果如图:

单击按钮分别显示各个练习题代码运行结果

factorial
multiplication
bubbleSort
division
car
zoo

输出结果将在此处显示.......

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