Data integrity

Data privacy

Data availability

Among all these attributes, authentication is the most important attribute. To provide security to your Web service, you need to have a secure mechanism for authentication. Authentication is defined as the process of verifying the details of the user attempting to access the Web service. This verification is done on the basis of the information stored about the user. This information may include a password, an ID, or a thumbprint. These credentials stored for a user are called principal. However, to avoid a situation in which an unauthorized user tries to access the Web service by using the password assigned to an authorized user, you need to carefully decide the authentication credentials for your Web service.

Summary

In this chapter, you learned how to create the DTWebService Web service. While creating the Web service, you added the required Web methods to the Web service. These Web methods include AcceptDetails(), GenerateOrder(),

SearchALL(), SrchISBN(), SrchTitle(), SrchCategory(), and SrchAuthor(). In this

way, you can also create a Web service for Black and White Publications.

After adding the Web methods to the DTWebService Web service, you tested the Web service in the Internet Explorer window. Finally, you learned to secure a Web service.

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672 Project 5 CREATING A WEB PORTAL FOR A BOOKSTORE

Creating the Results Form

The Results page is generated to display the results of the user’s query. To create the Results form, you need to include a DataGrid, a label, and a hyperlink control. You can name the Results form DispResultForm. After adding the controls, you need to change the properties of the Web form controls as shown in Table 30-2.

Table 30-2 Properties for the Controls Added to the Results Form

After adding the DataGrid control to the form, you need to add button controls to the DataGrid control. To do this, perform the following steps:

1.Select the DataGrid control to view its Properties window.

Below the Properties window, the Property Builder link is displayed.

2.Click on the Property Builder link to display the DataGrid1 Properties dialog box.

3.In the DataGrid1 Properties dialog box, select the Columns tab in the left hand pane.

4.In the Available columns: list box, expand the Button Column node.

5.Select the Select option and click on the right arrow button to add the Select button.

When you add the Select button, the text boxes in the ButtonColumn properties area become enabled.

6.In the Text: text box, type the text as Order.

7.In the Command name: text box, type the value as Ord.

8.In the Button Type: list box, select the value as LinkButton.

9.Click on the OK button to close the DataGrid1 Properties dialog box.

Figure 30-2 shows the DataGrid1 Properties dialog box.

FIGURE 30-2 The DataGrid1 Properties dialog box

When you create the form, the DispResultForm form looks as shown in Figure 30-3.

674 Project 5 CREATING A WEB PORTAL FOR A BOOKSTORE

FIGURE 30-3 The DispResultForm form

Creating the Orders Form

The Orders form stores the details of the book and the customers who order a book at the Web site. To do this, 1 button control, 2 hyperlink controls, 12 label controls, 1 list control, 5 RequiredFieldValidator controls, and 10 text box controls are added to the form. Name this Web form OrdersForm. In the OrdersForm form, change the properties of the controls as shown in Table 30-3.

Table 30-3 Properties for the Controls Added to the Orders Form

Table 30-3 Properties for the Controls Added to the Orders Form (continued)

676 Project 5 CREATING A WEB PORTAL FOR A BOOKSTORE

Table 30-3 Properties for the Controls Added to the Orders Form (continued)

Table 30-3 Properties for the Controls Added to the Orders Form (continued)

In addition to the previously mentioned controls, you need to add an sqlDataAdapter, an sqlConnection, and Dataset objects to the OrdersForm form. I have already explained the steps to include these controls to the form in Chapter 29, “Developing Web Services,” in the section “Creating a Web Service for Deepthoughts Publications.”

Figure 30-4 shows the form after it is created.

FIGURE 30-4 The OrdersForm form

Creating the Search Form

The Search form allows a user to search for records based on criteria. Therefore, the user needs to enter the criteria and a value for the criteria. To create the Search form, add a label control, two button controls, four radio buttons, and four text box controls to the form and then change the properties of the controls added to

FIGURE 30-5 The Search form

Once the form is created, you can rename the form SearchForm.

Creating the Construction Form

To create the construction form, add a hyperlink control and two label controls to the form. Rename the form ConstructionForm. Next, you need to change the properties of the controls, as shown in Table 30-5.

Table 30-5 Properties for the Controls Added to the Construction Form