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Thursday, May 28, 2015
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How to design online examination project in asp.net c#

9:45 AMThursday, May 28, 2015
Before design the system, must to prepare the database. If you want to design the database then must to know about the system requirements so I have a system requirements:
Hardware System: Core i3 processor for better performance.
Software System:  Visual studio 2013 or higher like visual studio 2015 CTP.
Application Requirements: Design a software application through which we can conduct exam online, in which we have two module, one for students and one for administrator. In the student module, first to authorized student login in the system after that choose subject by the pop up menu. After some time exam panel will appear on the screen, students can select one option at a time. After complete the exam student can see the own result. Also provide the help system to the student, in which an authorized person can put the query to the administrator. An administrator module provide some following function:
  • 1.       Add new student
  • 2.       Change password module
  • 3.       Add new Subject
  • 4.       Update question size
  • 5.       Respond to the user query
  • 6.       See the result of the students

So, after finishing the requirements should go for database design part. First of all I would like to discussed about register and login table and many more tables , to design the table in visual studio please follow the following path
Right click on your table nameà Add new table à After add column in the table please click “update” button.
 Register table:
 In the register table , according to visual studio snap which is mentioned below. We have six columns. Which name are , mid, lname, pwd, full name, email, and dlv. Mid means member id , which is unique and primary key of the table. Through this table we will perform registration in the system. Mid column contain only integer type value and all remaining columns contain variable types characters with their character range.
Login table:

Register table is used for member login, so it’s not a separate table in the server explorer.

Register table:


Questions table:
Through this table we will put questions in the examination panel. This table also contain answer and subject id column. Through this we can access the specific subject in the panel.  In this table we have 8 columns which is given below in the snap. qid column Is the primary key column of the table, so we can easily identify the uniqueness of the record. In the Question column we will put some question along with their answers in the answers column. “cans” means correct answers, I mean to say put the correct answer number in the column, such as if your first answer is correct then put 1 in the column. “sid” means subject id. The next table define the subject which is mentioned in the project.

Questions table:


  Subject Table :
In this table we have only two columns, these are “sid” and “sname”. Sid means subject id and sname means subject name.  Please carefully insert the data in this table because all other remaining table are related to this table via foreign key.  Question table is also mapped with this table
  Subject Table :

Exam table:
In this table we will store the result of the examination. A student who give the exam by the exam panel.
In it we will store the examid, member_id, sid, no of question, no of correct answer and date.
Now , finish the database design and come to the design part of the project. First to design the master page in the project. Now, learn how to add a master page in the project. Please follow the following path:
Right click on your project nameà Select add new itemà select masterpage , which extension is .master.  A small description of master page.
Master page
One of the cool new things introduced in ASP.NET 2.0 is Master Pages. Master Pages give you the ability to define a master page layout and look that is used throughout a site to give a consistent look & feel to all pages. Any updates or changes to the look & feel of the site is done in only one place - the Master Page.

A master page is similar to an ordinary ASP.NET page except for the top @Master directive and the presence of one or more ContentPlaceHolder server controls. A ContentPlaceHolder

control defines a region in the master page that can be customized in a derived page. ContentPlaceHolder acts as container which holds controls/items defined in the derived pages. <asp:contentplaceholder runat="server" ID="PageBody" />

In the derived pages, server control <asp:Content> is used to provide actual content to ContentPlaceHolders of Master Page. The link between placeholders and content is established through the Content place holder ID.

<asp:Content runat="server" contentplaceholderID="PageBody">
...
</asp:Content>
In the master page we have a style sheet , through it we can change the graphics of the web project or you can say layout or design of the project.In this project style is exist in the style folder. Now take a look of the style sheet , which extension is .css.
.page{
    width:900px;
    margin: 0px auto 0px auto;


}
In this we have we have a class which is start from dot. In the class we have some property , through this we can set the layout of the project. In the above mentioned snap , I set the width of the project is 900px and margin of the project.
Now come to the next part that is navigation part, through this we can move the next page of the project like
Home-à aboutàContactàuseràadminàUser help
Learn, how to design navigation bar in the project. Add a menu control from the toolbox , add some items like home, about, contact etc in the menu by the help of collection property. Also set the oriention property of the menu is horizontal. Lets take a look of menu bar.

Now come to the next phase is user login module , but user is logged in when he/she is authorized.
So first to discussed about admin panel. Now, create a new folder name admin. In it add new master page for administrator interface.

In the above mentioned snap we have a master page whose name is mianadmin.aspx. This master page is also inherit from previous master page which is exist in the root folder. Add a html table from the tool box and also add new content place holder from the toolbox. In the left panel, add a menu control for navigation purpose. Add some items in the menu control like

BY the Add User hyperlink we can navigate to the register page , where admin add new students in the database. So lets to talk about how to register a new student in the database. Create a student register form with the help of tool box in the .ascx file. In this project we add a new .ascx file in the web user control folder.  Lets to learn how to perform registration in the asp.net.
Registration:
  • 1.       First to create a object of SqlConnection class, that object invoke the method and property of the SqlConnection class.
  • 2.       By the help of coneection string property we have to create the connection between the front to back end.
  • 3.       Create a sqlCommand class , through which we can communicate with the database table.
  • 4.       By the help of ExecuteNonQuery ( ) method , we will insert the item in the databse.

If user is successfully registered by the admin then user logged in the  examination panel with the help of login page.
Login page:
1.       First to create a object of SqlConnection class, that object invoke the method and property of the SqlConnection class.
2.       By the help of coneection string property we have to create the connection between the front to back end.
3.       Create a sqlCommand class , through which we can communicate with the database table.
4.       By the help of executeReader() method , we can read rows one by one. So we can easily find the data in the table.
After successfully login , student move the exam panel where who give the answers of the question , So lets to talk about design of the examination page.
  • 1.       Add some label control for student name, date , question name etc.
  • 2.       Add four radio button for answers option.
  • 3.       Add a sql DataSource control to connect the Question table.

When student give the answer by the radio button then he/she store the result in the tempary variable, I mean to say in this project we have two temporary variable first is used for wrong answer and second one is used for correct answer.
Now calculate the correct answer and wrong answer , after that it will store in the exam table. This table see by the student immediately after the end of examination. Also this table see by the administrator.
User Help:
By the user help form, user request put some request to the admin. So for this type of query we will add a form view control in the page from the tool box control. Bind this form view with the sql data source control. 


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