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Use Case Diagram

Posted By: Rahul     Posted Date: December 06, 2009    Points: 2   Category :Others
The use case diagram shows the functionality of the system from an outside-in viewpoint.

Actors (stick men) are anything outside the system that interacts with the system.

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An Entity Relationship Diagram Example

An Entity Relationship Diagram conveys a lot of information with a very concise notation. The important part to keep in mind is to limit what you're reading using the following technique:

Choose two entities (e.g. Company and Employee)
Pick one that you're interested in (e.g. how a single Company relates to employees)
Read the notation on the second entity (e.g. the crow's feet with the O above it next to the Employee entity).

Visual Case Tool - UML Tutorial

The Class Diagram

The class diagram is core to object-oriented design. It describes the types of objects in the system and the static relationships between them.

UML Diagram Types

UML provides a number of diagram types as a mechanism for entering model elements into the model and showing overlapping sets of models elements and their relationships. UML does not specify what diagrams should be created or what they should contain, only what they can contain and the rules for connecting the elements. The diagram types include:

UML Diagram Types - 2

Further diagram types include:

Activity Diagrams - a generic flow chart used much in business modelling and sometimes in use case modelling to indicate the overall flow of the use case. This diagram type replaces the need for dataflow diagrams but is not a main diagram type for the purposes of analysis and design.

Sequential Diagram

Gives Total Exposure On Sequential Diagrma

I want Er Diagram for Fees System of small institution ,can u plz guide me what fields are necessary


I want Er Diagram for Fees System of small institution ,can u plz guide me what fields are necessary to store Fees information ...




Hello, i need help changing the following code into a switch...case statementUndecided

<script runat="server">
void Page_Load()
    if (Page.IsPostBack)
    public String toSring()
    int intcomputerChoice=1;
       if (Page.IsPostBack)

Editor's Note: In Case You Hadn't Noticed .


Find out what's new for MSDN Magazine, including a print redesign and the introduction of virtual labs on our web site so you can experiment with our code.

Howard Dierking

MSDN Magazine June 2008

.NET Migration Case Study: Using ASP.NET to Build the beta.visualstudio.net Web Site


When the Web site used to collect customer feedback about the Visual Studio .NET beta needed an update, the Visual Studio team saw a good opportunity to implement, deploy, and showcase a real-world site using .NET technologies. This article covers the migration of the Web site, beta.visualstudio.net, from components written in Visual Basic 6.0 and ASP hosted on Microsoft Internet Information Services (IIS) 5.0 to ASP.NET and the .NET Framework. The choices of technologies to be incorporated, along with issues such as validation, security, and authentication, are all discussed. Both existing components and the new components written in JScript and ASP.NET that were used to migrate the site are also explained.

Jay Schmelzer

MSDN Magazine September 2001

Case statement is never executing


Can some please advise as to why the case statement is never running


Imports Microsoft.VisualBasic
Imports AjaxControlToolkit

Public Class MultilevelAccordion
    Inherits System.Web.UI.UserControl
    Implements System.Web.UI.ITemplate

    Dim templateType As AccordionItemType

    Sub New(ByVal type As AccordionItemType)
        templateType = type

    End Sub

    Sub New()

    End Sub

    Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) _
          Implements System.Web.UI.ITemplate.InstantiateIn

        Dim ph As New PlaceHolder()

        Select Case (templateType)
            Case AccordionItemType.Header
                Dim myLabel As Label = New Label()
                myLabel.ID = "HeaderLabel"

                AddHandler ph.DataBinding, New EventHandler(AddressOf Item_DataBinding)
            Case AccordionItemType.Content
                AddHandler ph.DataBinding, New EventHandler(AddressOf Item_DataBinding)
        End Select
    End Sub

    Shared Sub Item_DataBinding(ByVal sender As Object, ByVal e As AccordionItemEventArgs)

        Dim ph As PlaceHolder = CType(sender, PlaceHolder)
        Dim headerValue As String = _

How to setup db diagram to automatically insert username into table?

 I have a table setup in the database for users who are basically going to create a classified listing.  How can I setup a diagram that would easily create a table relationship with the Users table, so that it automatically inserts the users username when they submit a new ad?  If so, how?  I've tried adding a UserName row to my table and creating a relationship with the Users table "UserName" row, but it wasn't accepting the relationship when I tried to save the diagram...apparently because the UserName row in the Users table isn't a primary key?Also, one this is setup, what's the best way to provide the user a way to see a list of their ads and have the ability to edit them?

LINQ to SQL and Case statement

Working with LINQ I realized that I had to use the simple case statement in my SQL query. There is no special keyword for this. To create a case statement like structure you will have to do it in the select section of the query. Below is an example of the usage of the case statement in LINQ. var t = from n in idc.categories            select new             {                        catName =                         (n.id==1 ? "Cat1" :                        n.id==2 ? "Cat2" :                        n.id==3 ? "Cat3" : "Unknown Category"                        )             }; Here in the above code we are using multiple cases for value 1, 2 and 3

Change case using Find & Replace dialog box

Hi, I want to change case of link URLs using Find & Replace dialog box . Is it possible? eg changing http://www.abc.com/S pecial-E dition.aspx, http://www.abc.com/O ther-N ews.aspx to http://www.abc.com/s pecial-e dition.aspx, http://www.abc.com/o ther-n ews.aspx

Database diagram support objects cannot be installed...

I can't make a diagram on our server(Win2003 x64,SQL 2005 Enterprise x64 sp2 3054). I have tried to login as an admin and create a new db, but get the same message - 'Database diagram support objects cannot be installed because this database does not have a valid owner. To..' Also tried to make a diagram from the ReportServer db.   Any suggestions?
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