In This Chapter
Simple sets of data can be expressed in a simple table, much like a traditional spreadsheet. But sometimes you don't wish to display complete details on a given table. For example, suppose you wish to display a master list of employees. However, you only wish for the full address and department details to be displayed for an employee when that record is selected. Dreamweaver enables you to do this by setting up what is known as a master-detail relationship.
You can use Dreamweaver to build master and detail Web pages, which are a popular way to display information on your Web site. A master page displays a list of records and corresponding links for each record. A user can click a link to see further information about a record on its associated detail page.
Depending on your programming language, you can either build the set of master and detail pages all in one operation, or you can separately build the master pages and then the detail pages. You can find out more about both methods in this chapter.
The examples in this chapter use a simple Employee table, which you can see in Table 1-1. The first value, the empid, is a special field called a key. It always has a unique value. Therefore, if you query for a record in a table by using the key, you always get only the row that you're looking for because no two rows have the same key.
Building Master and Detail Pages in One Operation (PHP, ASP, JSP, ColdFusion)
For PHP, ASP, JSP, and ColdFusion, you can build sets of master and detail pages all in one operation. You can use the same method for all these languages. Creating both the master and detail pages at the same time is generally easier, but Dreamweaver gives you the flexibility of creating them separately, too.
To create a master and detail page set for PHP, ASP, JSP, or ColdFusion, follow these steps:
1. Create a new or open an existing dynamic page.
A blank page opens in Dreamweaver; this page becomes your master page in the language that you selected.
2. Define a recordset for the page.
For the lowdown on creating a recordset, check out Book VIII, Chapter 1.
The recordset provides the data that's displayed on both the master and detail pages. Make sure that you include all the table columns that you need to create your master page, including the unique key (the record ID column) for each record and all the table columns that you need to create your detail page. Typically, you show more columns on the detail page than on the master page.
For the example in this chapter, we created an employee_records recordset and included all the columns in the employee table (see Table 1-1).
3. Save your changes to the master page.
The new recordset appears in the Bindings panel, and connection code is automatically added to the dynamic page, as shown in Figure 1-1. This page allows a listing of employees to display on the master page.
4. Choose Insert->Data Objects->Master Detail Page Set to insert the master and detail pages all in one operation.
The Insert Master-Detail Page Set dialog box appears (see Figure 1-2). You specify the properties for the master page in the top half of this dialog box and the properties for the detail page in the lower half.
5. From the Recordset drop-down list, select the recordset that you want to use for the master page.
For this example, I selected employee_records.
After you select a recordset, Dreamweaver fills in the rest of the fields with the columns from the recordset.
6. In the Master Page Fields area, select which records you want to appear on the master page.
Click the plus (+) button to add a field and click the minus (-) button to remove a field. In Figure 1-2, we selected the first_name and last_ name fields. These fields appear on the master page in a table format.
Typically, fewer fields appear on the master page than the detail page.
7. From the Link to Detail From drop-down list, select the field in the recordset that you want to serve as the link to the detail page.
This field is the one that a user clicks on to display details for a given employee.
For example, I selected the last_name field to serve as the link to the detail page for each record.
8. From the Pass Unique Key drop-down list, select which field contains the values that you want to pass on to the detail page so it can identify the records.
Typically, you select the key field of the table. This key field tells the detail page which record to display for the user. For our example, we selected the empid field.
9. Specify the number of records that you want to show at one time on the master page.
In the example, we chose to show 10 records at a time.
10. In the Detail Page Name text box, enter a name for the detail page or click the Browse button to select an existing file.
For the example, we specify detail.php. Dreamweaver automatically uses this name when it creates the detail page.
11. In the Detail Page Fields area, select which records you want to appear on the master page.
Click the plus (+) button and minus (-) button to change the fields that appear on the detail page.
Typically, more fields appear on the detail page than the master page. For the example, we selected all the fields in the table.
As you can see, Figure 1-2 shows the configuration of the Insert Master-Detail Page Set dialog box based on the example values.
12. Click OK.
Dreamweaver creates the master and detail pages and includes dynamic content and server behaviors in both.
The Document window contains the automatically generated objects (a repeated region, navigation objects, record, counter, and link to the detail page), as shown in Figure 1-3.
The detail.php is created automatically for you. You can click the detail.php tab in the Document window to see the layout (see Figure 1-4).
13. Modify the design of the master and detail pages.
You can modify your dynamic fields just as you'd edit any other object.
When you finish designing the pages, you're ready to preview your work in a browser. See the section "Testing Your Master and Detail Pages," later in this chapter for details.
For ASP.NET, you need to build the master and detail pages separately (as described in the section "Developing Master and Detail Pages for ASP.NET," later in this chapter). You can't build these pages at the same time in one operation for ASP.NET.
Developing Master and Detail Pages Block by Block
You can develop a master page block by block for PHP, ASP, JSP, and ColdFusion. Although you usually create the master and detail pages at the same time, you can create them block by block to have complete control over the placement of the blocks.
Creating the master page
To create a dynamic master page, follow these steps:
1. Create a page and define a recordset.
Turn to Book VIII, Chapter 1 to find out how to define a recordset.
2. In the Document window, place the insertion point where you want the records to appear on the page.
3. Choose Insert->Data Objects->Dynamic Data->Dynamic Table.
The Dynamic Table dialog box opens, as shown in Figure 1-5.
4. From the Recordset drop-down list, select the name of the recordset that you want to appear on the master page.
5. Specify the number of records that you want to show at one time on the master page.
In the example, we wanted to show 10 records at a time.
6. Optionally, specify border, cell padding, and cell spacing.
7. Click OK to close the dialog box.
The master table is created and added to your document.
If you don't want users to see some of the columns on the master page, delete the column from the table by following these steps:
1. In Design view, click anywhere on the master page.
2. Put the pointer near the top of the column so that the column's entries are outlined in red. Then click to select the column.
3. Click the Delete button to delete the column from the table.
Setting up links to open a detail page
After you create the master page (as the preceding section describes), you need to create links that open the detail page and communicate which record the user selected so that only the detail for that record displays.
To set up links to open a detail page, follow these steps:
1. Open the master page in the Document window.
2. In the table, select the placeholder for the dynamic content on which you want to create a link.
3. In the Properties inspector, click the folder button next to the Link field.
The Select File dialog box appears (see Figure 1-6).
4. Browse to and select the detail page.
5. Click the Parameters button to the right of the URL field.
The Parameters dialog box opens.
Figure 1-7 shows the dialog box.
6. Click the plus (+) button to add a parameter.
This parameter tells the detail page which row to display. Select the key value column as this parameter.
7. In the Name column, enter the column name.
You can also click the Dynamic lightning bolt button and select it from the dialog box.
8. Click in the Value column and then click the Dynamic (lightning bolt) button.
The Dynamic Data dialog box displays. This is where you select the column from the recordset.
9. Expand the recordset, click the key field, and then click OK. In this case, the key field is empid.
After you click OK, the Parameters dialog box displays the new parameter and the code that places it into the page dynamically, as shown in Figure 1-7.
10. Click OK to close the Parameters dialog box.
The URL field in the Select File dialog box is pre-populated with the new parameter.
Each dynamic page type has different code that appears because each programming language uses a slightly different syntax to display a URL variable dynamically. Fortunately, because Dreamweaver is generating the code for you, you don't need to know the syntax differences.
11. Click Choose to close the Select File dialog box.
You return to the Document window. The name of the detail page appears in the Link field in the Properties inspector. The placeholder for the dynamic content is now a link.
12. Save your changes to the master page.
You now have a complete master page.
Read on to find out how to make the detail page.
Building detail pages
To create a detail page for PHP, ASP, JSP, and ColdFusion page types, follow these steps:
1. Create a new or open an existing PHP, ASP, JSP, or ColdFusion page.
2. In the Bindings panel, click the plus (+) button and select Recordset (Query) from the menu that appears.
The simple Recordset dialog box appears.
If you want to write your own SQL statements, click the Advanced button to display the advanced Recordset dialog box.
3. In the Name text box, enter a name for your recordset.
You can use only letters, numbers, and underscores in the name.
4. Select a database connection for obtaining the data that you want to display.
5. Select a table name for obtaining the data that you want to display.
After you select a table name, the database columns appear in the Columns list.
6. Select which columns should provide the record data to display.
Typically, your detail page uses more columns than your master page. You want the recordset for your detail page to contain at least one column (generally the id field) that matches the column that you use for the master page.
7. Complete the Filter sections as follows:
The first Filter field: Select the database column name that contains values to match against the URL parameter (specified in the "Setting up links to open a detail page" section earlier in this chapter). You use the filter to find and display the record specified by the URL parameter passed from the master page.
The second Filter field: Select the equals (=) symbol, if it's not already selected. This requires the fields to be equal, which they must be to display only the record that is detailed.
The third Filter field: Select the URL parameter.
The fourth Filter field: Enter the name of the URL parameter that you want the master page to pass to the detail page.
The recordset (see Figure 1-8) now returns only the data for the employee who's been selected on the master page.
8. Click the Test button.
The Test Value dialog box appears.
9. Enter a value in the Test Value field and click OK.
This value represents which detail record displays. This test helps you check that the detail page brings back the data you expect. A table displaying data from the recordset appears.
10. Click OK.
The Test SQL Statement window closes.
11. In the Recordset dialog box, click OK.
12. To bind the columns in the recordset to the detail page, select the columns in the Bindings panel and drag those columns onto the detail page.
Your detail page can now process requests from the master page. Figure 1-9 shows the Document window after adding fields from the recordset.
See the section "Testing Your Master and Detail Pages," later in this chapter, to find out how to preview your master and detail pages in a browser.
Developing Master and Detail Pages for ASP.NET
For ASP.NET, you can use the DataSet Web control to specify table columns and the DataGrid Web control to list the database records to display on the master page. The Web controls provide an easy way to display database data with controls for paging between multiple pages of records.
You need to define a database connection for the site before you create the master page. See Book VII for details.
Creating a master page
To create an ASP.NET master page, follow these steps:
1. Create a new or open an existing ASP.NET page in Dreamweaver.
2. In the Bindings panel, click the plus (+) button and select DataSet (Query) from the menu that appears.
The DataSet dialog box appears.
3. Complete the DataSet dialog box and then click OK.
Make sure to include all table columns that you need to create your master page, including the unique key (Record ID column) for each record.
A dataset is essentially the same thing as a recordset; see Book VIII, Chapter 1 for more information on recordsets. The new dataset appears in the Binding panel.
4. In the Server Behaviors panel, click the plus (+) button and select DataGrid from the menu that appears.
The DataGrid dialog box opens.
5. Select the dataset source from the DataSet drop-down list and click OK.
You can leave the default column type as Simple Data Field.
Excerpted from Dreamweaver CS4 All-in-One For Dummies by Sue Jenkins Richard Wagner Copyright © 2009 by John Wiley & Sons, Ltd. Excerpted by permission.
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