基于.NET的在线订餐系统设计与开发

基于.NET的在线订餐系统设计与开发,基于,NET,在线,系统,设计,开发 编号 无锡太湖学院 毕业设计（论文） 相关资料 题目：基于.net的在线订餐系统设计与开发 信机 系 计算机科学与技术 专业 学 号： 　　　0921125 　　　　 学生姓名： 包培培 指导教师： 　李朝锋 （职称：副教授） （职称： ） 2013年05月25日 目 录 一、毕业设计（论文）开题报告 二、毕业设计（论文）外文资料翻译及原文 三、学生“毕业论文（论文）计划、进度、检查及落实表” 四、实习鉴定表 无锡太湖学院 毕业设计（论文） 开题报告 题目：基于.net的在线订餐系统设计与开发 信机 系 计算机科学与技术 专业 学 号： 0921125 学生姓名： 陆　 莹 指导教师： 李朝锋 （职称：副教授 ） （职称： ） 2012年12月06日 课题来源 自拟题目 科学依据（包括课题的科学意义；国内外研究概况、水平和发展趋势；应用前景等） 随着人们生活水平的提高，对饮食的要求也越来越高。餐饮业是一种个性化、多样化的服务产业。通过网上订餐,顾客不需到现场,便可以为自己、家人、朋友聚会等购买美食。网上订餐图文并茂，更能及时更新信息和在线查看，有效地解决了餐过程中排队，拥挤，餐单信息不能及时更新的问题。网上订餐既节省时间，更为广大客户提供更多选择。 据悉国外的许多知名餐饮企业在多年前就已经开始了出现网上订餐服务，并且受到了许多人士的欢迎。最近几年这些企业的网上订餐服务也在中国陆续推出、逐渐普及中。现在我国多数餐厅使用的订餐方式仍是电话订餐，这种订餐方式效率低，需人工记录，容易遗漏和出错。当然也有商家发现了新的市场开发网上业务。但是总体来说，我国的网上订餐业务还处于形成期，有很大的成长空间。 人们通过网络，可对菜品进行预订，这样不仅能够节约了时间，也能提高餐饮企业的订餐管理效率。最重要的是，这样的订餐方式不易出错，对每位客户的订餐处理及时，实现了高度智能化管理。因此网上订餐有望发展成一种潮流的订餐方式，成为餐饮业销售增长的新模式。 研究内容 本系统将实现在线网上订餐业务的自动化管理。整个系统由以下几个基本模块组成。 商品管理：主要实现对商品实时查询，及时增加、修改、删除相关信息的能。订单管理：用户可以查看已经预定的商品，预订的时间，付款情况。用户管理：新客户可申请账号进行菜品的预订，已经申请的用户可根据申请的账号登陆系统。商家可以对录入的会员信息进行管理。 系统管理：系统管理人员可对对软件的维护和权限进行管理。包括系统维护向导，权限管理。 数据库的需求： 因为无法连接到大型数据库，只能在本机上安装SQL Server 2000数据库软件。在此数据库中建立需要的表来保存数据。 拟采取的研究方法、技术路线、实验方案及可行性分析 在Windows系统下基于.NET环境使用Microsoft Visual Studio 2005开发软件进行系统开发，并采用SQL Server 2000作为数据库服务器进行数据处理。 首先熟悉所运用到的开发软件，收集整理相关的资料信息。然后了解整个订餐系统流程，设计系统总体框架，完成主体模块功能；对系统进行排版，界面的美化；实现系统与数据库的连接。最终对系统进行测试，查找漏洞，并逐步完善系统。 网上订餐可以方便人们的生活、提高效率。使人们可以足不出户就可完成订餐，网上订餐系统不仅可以实现客户在线订餐的功能，黑可以在此基础上完善配套的服务。让人们在生活中享受到科技进步所带来的便利。如今经济的发展推动了互联网技术的飞速发展，在订餐系统也显示这越来越强大的优势。 研究计划及预期成果 研究计划： 2012年12月12日以前： 收集相关资料，撰写《开题报告》，并按开题报告条款进入毕业设计阶段。 2012年12月~2013年1月：初步完成毕业设计系统框架.。 2013年2月：完成各功能模块编码 。 2013年3月~2013年4月：测试、验收，完善，撰写毕业论文。 2013年5月： 上交论文、系统代码、根据导师意见修改毕业论文并完善论文。 2013年6月2日~4日：进行毕业答辩。 预期成果：根据计划及时的完成每阶段的任务。 特色或创新之处 本课题是基于.NET架构下的ASP.NET和SQL Server 2000技术联合开发完成。 订餐信息简洁明了，配有图片文字说明，信息一目了然。 宣传效果明显，面向客户群体广泛。 无需安装第三方软件，甚至能过通过手机上网订餐。 操作简变，订餐信息准确，更能及时反应最新的菜品情况。 可实现预定功能，节省时间。 已具备的条件和尚需解决的问题 已具备的条件： 1、 一台计算机。 2、 客户的基本需求，订餐的总体流程。 3、 Microsoft Visual Studio 2005和SQL Server 2000软件。 尚需解决的问题： 1、 详细的需求分析 2、 具体模块功能的实现 指导教师意见 此处日期2011年11月14日-2010年11月18日之间 指导教师签名： 年 月 日 教研室（学科组、研究所）意见 教研室主任签名： 年 月 日 系意见 主管领导签名： 年 月 日 ASP.NET Technique 1. Building ASP.NET Pages ASP.NET and the .NET Framework ASP.NET is part of Microsoft's overall .NET framework，which contains a vast set of programming classes designed to satisfy any conceivable programming need. In the following two sections，you learn how ASP.NET fits within the .NET framework，and you learn about the languages you can use in your ASP.NET pages. The .NET Framework Class Library agine that you are Microsoft. Imagine that you have to support multiple programming languages—such as Visual Basic，JScript，and C++. A great deal of the functionality of these programming languages overlaps. For example，for each language，you would have to include methods for accessing the file system，working with databases，and manipulating strings. Furthermore，these languages contain similar programming constructs. Every language，for example，can represent loops and conditionals. Even though the syntax of a conditional written in Visual Basic differs from the syntax of a conditional written in C++，the programming function is the same. Finally，most programming languages have similar variable data types. In most languages，you have some means of representing strings and integers，for example. The maximum and minimum size of an integer might depend on the language，but the basic data type is the same. Maintaining all this functionality for multiple languages requires a lot of work. Why keep reinventing the wheel? Wouldn't it be easier to create all this functionality once and use it for every language? The .NET Framework Class Library does exactly that. It consists of a vast set of classes designed to satisfy any conceivable programming need. For example，the .NET framework contains classes for handling database access，working with the file system，manipulating text，and generating graphics. In addition，it contains more specialized classes for performing tasks such as working with regular expressions and handling network protocols. The .NET framework，furthermore，contains classes that represent all the basic variable data types such as strings，integers，bytes，characters，and arrays. Most importantly，for purposes of this book，the .NET Framework Class Library contains classes for building ASP.NET pages. You need to understand，however，that you can access any of the .NET framework classes when you are building your ASP.NET pages. Understanding Namespaces As you might guess，the .NET framework is huge. It contains thousands of classes (over 3，400). Fortunately，the classes are not simply jumbled together. The classes of the .NET framework are organized into a hierarchy of namespaces. ASP Classic Note In previous versions of Active Server Pages，you had access to only five standard classes (the Response，Request，Session，Application，and Server objects). ASP.NET，in contrast，provides you with access to over 3，400 classes! A namespace is a logical grouping of classes. For example，all the classes that relate to working with the file system are gathered together into the System.IO namespace. The namespaces are organized into a hierarchy (a logical tree). At the root of the tree is the System namespace. This namespace contains all the classes for the base data types，such as strings and arrays. It also contains classes for working with random numbers and dates and times. You can uniquely identify any class in the .NET framework by using the full namespace of the class. For example，to uniquely refer to the class that represents a file system file (the File class)，you would use the following: System.IO.File System.IO refers to the namespace，and File refers to the particular class. NOTE You can view all the namespaces of the standard classes in the .NET Framework Class Library by viewing the Reference Documentation for the .NET Framework. Standard ASP.NET Namespaces The classes contained in a select number of namespaces are available in your ASP.NET pages by default. (You must explicitly import other namespaces.) These default namespaces contain classes that you use most often in your ASP.NET applications: System— Contains all the base data types and other useful classes such as those related to generating random numbers and working with dates and times. System.Collections— Contains classes for working with standard collection types such as hash tables，and array lists. System.Collections.Specialized— Contains classes that represent specialized collections such as linked lists and string collections. System.Configuration— Contains classes for working with configuration files (Web.config files). System.Text— Contains classes for encoding，decoding，and manipulating the contents of strings. System.Text.RegularExpressions— Contains classes for performing regular expression match and replace operations. System.Web— Contains the basic classes for working with the World Wide Web，including classes for representing browser requests and server responses. System.Web.Caching— Contains classes used for caching the content of pages and classes for performing custom caching operations. System.Web.Security— Contains classes for implementing authentication and authorization such as Forms and Passport authentication. System.Web.SessionState— Contains classes for implementing session state. System.Web.UI— Contains the basic classes used in building the user interface of ASP.NET pages. System.Web.UI.HTMLControls— Contains the classes for the HTML controls. System.Web.UI.WebControls— Contains the classes for the Web controls. .NET Framework -Compatible Languages For purposes of this book，you will write the application logic for your ASP.NET pages using Visual Basic as your programming language. It is the default language for ASP.NET pages. Although you stick to Visual Basic in this book，you also need to understand that you can create ASP.NET pages by using any language that supports the .NET Common Language Runtime. Out of the box，this includes C#，JScript.NET，and the Managed Extensions to C++. NOTE Dozens of other languages created by companies other than Microsoft have been developed to work with the .NET framework. Some examples of these other languages include Python，SmallTalk，Eiffel，and COBOL. This means that you could，if you really wanted to，write ASP.NET pages using COBOL. Regardless of the language that you use to develop your ASP.NET pages，you need to understand that ASP.NET pages are compiled before they are executed. This means that ASP.NET pages can execute very quickly. The first time you request an ASP.NET page，the page is compiled into a .NET class，and the resulting class file is saved beneath a special directory on your server named Temporary ASP.NET Files. For each and every ASP.NET page，a corresponding class file appears in the Temporary ASP.NET Files directory. Whenever you request the same ASP.NET page in the future，the corresponding class file is executed. When an ASP.NET page is compiled，it is not compiled directly into machine code. Instead，it is compiled into an intermediate-level language called Microsoft Intermediate Language (MSIL). All .NET-compatible languages are compiled into this intermediate language. An ASP.NET page isn't compiled into native machine code until it is actually requested by a browser. At that point，the class file contained in the Temporary ASP.NET Files directory is compiled with the .NET framework Just in Time (JIT) compiler and executed. The magical aspect of this whole process is that it happens automatically in the background. All you have to do is create a text file with the source code for your ASP.NET page，and the .NET framework handles all the hard work of converting it into compiled code for you. ASP CLASSIC NOTE What about VBScript? Before ASP.NET，VBScript was the most popular language for developing Active Server Pages. ASP.NET does not support VBScript，and this is good news. Visual Basic is a superset of VBScript，which means that Visual Basic has all the functionality of VBScript and more. So，you have a richer set of functions and statements with Visual Basic. Furthermore，unlike VBScript，Visual Basic is a compiled language. This means that if you use Visual Basic to rewrite the same code that you wrote with VBScript，you can get better performance. If you have worked only with VBScript and not Visual Basic in the past，don't worry. Since VBScript is so closely related to Visual Basic，you'll find it easy to make the transition between the two languages. NOTE Microsoft includes an interesting tool named the IL Disassembler (ILDASM) with the .NET framework. You can use this tool to view the disassembled code for any of the ASP.NET classes in the Temporary ASP.NET Files directory. It lists all the methods and properties of the class and enables you to view the intermediate-level code. This tool also works with all the ASP.NET controls discussed in this chapter. For example，you can use the IL Disassembler to view the intermediate-level code for the TextBox control (located in a file named System.Web.dll). Introducing ASP.NET Controls ASP.NET controls provide the dynamic and interactive portions of the user interface for your Web application. The controls render the content that the users of your Web site actually see and interact with. For example，you can use controls to create HTML form elements，interactive calendars，and rotating banner advertisements. ASP.NET controls coexist peacefully with HTML content. Typically，you create the static areas of your Web pages with normal HTML content and create the dynamic or interactive portions with ASP.NET controls. The best way to understand how ASP.NET controls work in an HTML page is to look at a simple Web Forms Page. Adding Application Logic to an ASP.NET Page The second building block of an ASP.NET page is the application logic，which is the actual programming code in the page. You add application logic to a page to handle both control and page events. If a user clicks a Button control within an HTML form，for example，the Button control raises an event (the Click event). Typically，you want to add code to the page that does something in response to this event. For example，when someone clicks the Button control，you might want to save the form data to a file or database. Controls are not the only things that can raise events. An ASP.NET page itself raises several events every time it is requested. For example，whenever you request a page，the page's Load event is triggered. You can add application logic to the page that executes whenever the Load event occurs. 2. Building Forms with Web Server Controls Building Smart Forms You use several of the basic Web controls to represent standard HTML form elements such as radio buttons，text boxes，and list boxes. You can use these controls in your ASP.NET pages to create the user interface for your Web application. The following sections provide detailed overviews and programming samples for each of these Web controls. Controlling Page Navigation In the following sections，you learn how to control how a user moves from one ASP.NET page to another. First，you learn how to submit an HTML form to another page and retrieve form information. Next，you learn how to use the Redirect() method to automatically transfer a user to a new page. Finally，you learn how to link pages together with the HyperLink control. Applying Formatting to Controls In the following sections，you learn how to make more attractive Web forms. First，you look at an overview of the formatting properties common to all Web controls; they are the formatting properties of the base control class. Next，you learn how to apply Cascading Style Sheet styles and classes to Web controls. 3. Performing Form Validation with Validation Controls Using Client-side Validation Traditionally，Web developers have faced a tough choice when adding form validation logic to their pages. You can add form validation routines to your server-side code，or you can add the validation routines to your client-side code. The advantage of writing validation logic in client-side code is that you can provide instant feedback to your users. For example，if a user neglects to enter a value in a required form field，you can instantly display an error message without requiring a roundtrip back to the server. People really like client-side validation. It looks great and creates a better overall user experience. The problem，however，is that it does not work with all browsers. Not all browsers support JavaScript，and different versions of browsers support different versions of JavaScript，so client-side validation is never guaranteed to work. For this reason，in the past，many developers decided to add all their form validation logic exclusively to server-side code. Because server-side code functions correctly with any browser，this course of action was safer. Fortunately，the Validation controls discussed in this chapter do not force you to make this difficult choice. The Validation controls automatically generate both client-side and server-side code. If a browser is capable of supporting JavaScript，client-side validation scripts are automatically sent to the browser. If a browser is incapable of supporting JavaScript，the validation routines are automatically implemented in server-side code. You should be warned，however，that client-side validation works only with Microsoft Internet Explorer version 4.0 and higher. In particular，the client-side scripts discussed in this chapter do not work with any version of Netscape Navigator. Requiring Fields:The RequiredFieldValidator Control You use RequiredFieldValidator in a Web form to check whether a control has a value. Typically，you use this control with a TextBox control. However，nothing is wrong with using RequiredFieldValidator with other input controls such as RadioButtonList. Validating Expression:The RegularExpressionValidator Control You can use RegularExpressionValidator to match the value entered into a form field to a regular expression. You can use this control to check whether a user has entered，for example，a valid e-mail address，telephone number，or username or password. Samples of how to use a regular expression to perform all these validation tasks are provided in the following sections. Comparing Values:The CompareValidator Control The CompareValidator control performs comparisons between the data entered into a form field and another value. The other value can be a fixed value，such as a particular number，or a value entered into another control. Summarizing Errors:The ValidationSummary Control Imagine that you have a form with 50 form fields. If you use only the Validation controls discussed in the previous sections of this chapter to display errors，seeing an error message on the page might be difficult. For example，you might have to scroll down to the 48th form field to find the error message. Fortunately，Microsoft includes a ValidationSummary control with the Validation controls. You can use this control to summarize all the errors at the top of a page，or wherever else you want. 4. Advanced Control Programming Working with View State By default，almost all ASP.NET controls retain the values of their properties between form posts. For example，if you assign text to a Label control and submit the form，when the page is rendered again，the contents of the Label control are preserved. The magic of view state is that it does not depend on any special server or browser properties. In particular，it does not depend on cookies，session variables，or application variables. View state is implemented with a hidden form field called VIEWSTATE that is automatically created in every Web Forms Page. When used wisely，view state can have a dramatic and positive effect on the performance of your Web site. For example，if you display database data in a control that has view state enabled，you do not have to return to the database each time the page is posted back to the server. You can automatically preserve the data within the page's view state between form posts. Displaying and Hiding Content Imagine that you are creating a form with an optional section. For example，imagine that you are creating an online tax form，and you want to display or hide a section that contains questions that apply only to married tax filers. Or，imagine that you want to add an additional help button to the tax form. You might want to hide or display detailed instructions for completing form questions depending on a user's preferences. Finally，imagine that you want to break the tax form into multiple pages so that a person views only one part of the tax form at a time. In the following sections，you learn about the properties that you can use to hide and display controls in a form. You learn how to use the Visible and Enabled properties with individual controls and groups of controls to hide and display page content. Using