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WebForm版demo,模拟手机Usb接口充电

作者:佚名      ASP.NET网站开发编辑:admin      更新时间:2022-07-23
WebForm版demo,模拟手机Usb接口充电

材料清单:Mobile(手机),MiniCharger(迷你充电器),IUsb(USB接口),

设计思路:

1.声明IUsb约定对象之间的交互方式,其中包含一个事件;

2.Mobile实现IUsb接口,这是关键点,是调用者实现接口,需求通过事件委托给充电设备自行处理;

3.Mobile反射充电设备,通过构造函数注入IUsb;

代码清单:

1 public interface IUsb {2     decimal Voltage { get; set; }3     event System.EventHandler Connecting;4     }
IUsb.cs
 1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Mobile.aspx.cs" Inherits="Mobile" %> 2  3 <!DOCTYPE html> 4  5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8     <title></title> 9 </head>10 <body>11     <form id="form1" runat="server">12     <div>13         <label>电压:</label><asp:Label ID="lblVoltage" runat="server" Text="0" ></asp:Label>14         <asp:Label ID="lblMessage" runat="server" Text="没电了" ></asp:Label>15         <asp:DropDownList ID="drpSelect" runat="server">16             <asp:ListItem Text="迷你充电器" Value="MiniCharger"></asp:ListItem>17             </asp:DropDownList>18         <asp:Button ID="btnConnect" runat="server" Text="连接充电设备" OnClick="btnConnect_Click" />19     </div>20     </form>21 </body>22 </html>
Mobile.aspx
 1 using System; 2 public partial class Mobile : System.Web.UI.Page, IUsb { 3     public decimal Voltage { get; set; } 4     public event EventHandler Connecting; 5     PRotected const decimal Increment = 0.5m; 6     protected const decimal Max = 5.0m; 7  8     protected object LoadCharger(string pType) { 9         string _fileName = "Z:\\" + pType + ".dll";10         object[] _args = new object[] { this };11         return System.Activator.CreateInstanceFrom(12             _fileName, pType, true, 0, null, _args, null, null);13         }14 15     protected void btnConnect_Click(object sender, EventArgs e) {16         this.LoadCharger(this.drpSelect.SelectedItem.Value);17         this.ShowMessage();18         }19 20     protected void ShowMessage() {21         if (this.Connecting == null) this.lblMessage.Text = "设备无响应";22         else {23             this.Connecting(null, EventArgs.Empty);24             this.lblVoltage.Text = this.Voltage.ToString();25             this.lblMessage.Text = (this.Voltage==0)?"设备无充电功能"26                 : (this.Voltage == Max) ? "瞬间充满" 27                 :"充电中";28             }29         }30 31     }
Mobile.aspx.cs
 1 using System; 2 [Serializable] 3 public class MiniCharger { 4     protected IUsb Usb { get; set; } 5     protected const decimal Voltage = 5.0m; 6     public MiniCharger(IUsb pElement) { 7         this.Usb = pElement; 8         this.Usb.Connecting += Element_Connecting; 9         }10 11     void Element_Connecting(object sender, EventArgs e) {12         this.Usb.Voltage = Voltage;13         }14     }
MiniCharger.cs

我只是写个骨架,有兴趣的朋友可以多实现几个不同类型的Usb设备,并且可以尝试扩展Usb接口的功能,比如说为手机增加拷贝数据的功能,

看看连接笔记本电脑和充电器的不同效果