Case Study

TreeView Control

A TreeView control is a Windows Forms control that you can use to display a hierarchy of nodes. These nodes are called root or parent nodes. Each root node in the hierarchy can contain one or more nodes, called child nodes.The root and parent nodes can be collapsed or expanded.

To add a TreeView control in Visual Studio .NET, you can drag the TreeView control from the Windows Forms toolbox to the EmployeeRecordsForm form. Figure 13-3 shows the TreeView control in the Windows Forms toolbox.

FIGURE 13-3 A TreeView control in the Windows Forms toolbox

You can create a TreeView control by dragging a TreeView control from the Windows Forms toolbox to the form.The appearance of the TreeView control can be changed from the properties window. Table 13-1 lists and explains some of the important TreeView control properties.

You will now create a TreeView control for the application. To create a TreeView control, perform the following steps:

1.Drag a TreeView control from the Windows Forms toolbox to the form. A blank TreeView control is added to the form.

2.Press the F4 key to display the properties of the TreeView control.

3.In the Properties window, change the following properties:

Name: treeView1

ShowLines: True

ShowPlusMinus: True

ShowRootLines: True

Size: 240, 352

The control does not contain any nodes. You can add both parent and child nodes to the TreeView control by using the Nodes property. You can also add nodes programmatically, which will be discussed in the next chapter.

ListView Control

A ListView control is a Windows Form control that displays a collection of items by using one of the four different possible views. A ListView control enables you to display a list of items with text and images to identify the type of item. You can display the items in a ListView control as large icons, small icons, or a vertical list. The items can also be displayed with column headers identifying the information being displayed in a subitem.

You can create a ListView control by dragging a ListView control from the Windows Forms toolbox to the form.The appearance of the ListView control can be changed from the Properties window. Table 13-2 lists and explains some of the important ListView control properties.

You will now create a ListView control for the application. To create a ListView control, perform the following steps:

1.Drag a ListView control from the Windows Forms toolbox to the form.

A blank ListView control is added to the form. Similar to the TreeView control, the appearance of the ListView control can be modified by changing its properties.

2.Press the F4 key to display the properties of the ListView control.

3.In the Properties window, change the following properties:

Name: listView1

Activation: TwoClick

MultiSelect: False

View: Details

StatusBar Control

A StatusBar control is a Windows Forms control that typically appears at the bottom of the form and is used to display different types of status information. A StatusBar control can have status bar panels on them that display text or icons to indicate the state. The StatusBar panels can be used to display information about page numbers, spelling and grammar status, and editing modes on the status bar.

Perform the following steps to create a status bar for the application:

1.Drag a StatusBar control from the Windows Forms toolbox to the form.

2.Press F4 and change the following properties:

Name: statusBar1

ShowPanels: True

Panels can be added to a StatusBar control either at design time through

StatusBarPanel Collection Editor or at run time through the Status-

BarPanelCollection class.

3.In the Properties window, click on the Panels property, and then click on the ellipsis (…) button to open StatusBarPanel Collection Editor.

4.Add a panel by clicking the Add button.

306 Project 2 CREATING THE EMPLOYEE RECORDS SYSTEM PROJECT

5. Change the following values:

Name: statusBarPanel1

Text: Click the employee code to view details

Width: 240

The StatusBarPanel Collection Editor is shown in Figure 13-4.

FIGURE 13-4 The StatusBarPanel Collection Editor

The XML File Schema

The development team decides to store the records of the employees in an XML file.This would facilitate accessing the data store from any system.The schema of this XML file is as follows:

<?xml version=”1.0”?>

<EmpRecordsData>

<Ecode Id=”E0001” EmployeeName=”Michael Perry”>

<EmpDetails DateofJoin=”02-02-1999” Grade=”A” salary=”1750”/>

</Ecode>

<Ecode Id=”E0002” EmployeeName=”Jenifer Carell”>

<EmpDetails DateofJoin=”03-22-1999” Grade=”B” salary=”2500”/> </Ecode>

<Ecode Id=”E0003” EmployeeName=”George Rice”>

<EmpDetails DateofJoin=”04-18-1999” Grade=”A” salary=”1800”/> </Ecode>

<Ecode Id=”E0004” EmployeeName=”Pamela Griffin”>

<EmpDetails DateofJoin=”04-27-1999” Grade=”E” salary=”7000”/> </Ecode>

<Ecode Id=”E0005” EmployeeName=”Simon Watson”>

<EmpDetails DateofJoin=”05-03-1999” Grade=”A” salary=”1650”/> </Ecode>

<Ecode Id=”E0006” EmployeeName=”Daniel Allison”>

<EmpDetails DateofJoin=”05-13-1999” Grade=”D” salary=”5700”/> </Ecode>

<Ecode Id=”E0007” EmployeeName=”Laura Hansen”>

<EmpDetails DateofJoin=”06-02-1999” Grade=”C” salary=”4150”/> </Ecode>

<Ecode Id=”E0008” EmployeeName=”Sarah Judd”>

<EmpDetails DateofJoin=”09-11-1999” Grade=”B” salary=”2600”/> </Ecode>

<Ecode Id=”E0009” EmployeeName=”Joshua Johnson”>

<EmpDetails DateofJoin=”09-23-1999” Grade=”E” salary=”7725”/> </Ecode>

<Ecode Id=”E0010” EmployeeName=”Larry Gates”>

<EmpDetails DateofJoin=”10-20-1999” Grade=”C” salary=”4350”/> </Ecode>

<Ecode Id=”E0011” EmployeeName=”Nicholas Harvey”>

<EmpDetails DateofJoin=”10-20-1999” Grade=”B” salary=”2720”/> </Ecode>

<Ecode Id=”E0012” EmployeeName=”Michael Brown”>

<EmpDetails DateofJoin=”11-11-1999” Grade=”A” salary=”1665”/> </Ecode>

<Ecode Id=”E0013” EmployeeName=”George Lewis”>

<EmpDetails DateofJoin=”12-07-1999” Grade=”B” salary=”3150”/> </Ecode>