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Creating list page links to edit and update data

From: Dreamweaver with PHP and MySQL

Video: Creating list page links to edit and update data

Once you've created a list page and data entry forms for inserting and updating data, you can then tie the whole thing together by adding hyperlinks to the list page. The user will be able to click the links to navigate to the forms. I'll start this demonstation in the file explorerlist.php, in the explorers folder of the site. Looking at the file in Design View, I'll click on the Live View button and show that the page is successfully retrieving and displaying data from MySQL. I'll exit Live View and then click to the right of the HTML table, and I'll press Enter or Return to create a new paragraph.

Creating list page links to edit and update data

Once you've created a list page and data entry forms for inserting and updating data, you can then tie the whole thing together by adding hyperlinks to the list page. The user will be able to click the links to navigate to the forms. I'll start this demonstation in the file explorerlist.php, in the explorers folder of the site. Looking at the file in Design View, I'll click on the Live View button and show that the page is successfully retrieving and displaying data from MySQL. I'll exit Live View and then click to the right of the HTML table, and I'll press Enter or Return to create a new paragraph.

Then I'll type some text that the user will be able to click on to navigate to the insert form. I'll type the text Insert New Explorer. Then I'll select that new text and go to the Properties panel. I'll make sure that the HTML category is selected and then I'll create the hyperlink using either the Point to File or the Browse for File tools. For this demonstration, I'll use Point to File. Make sure that the file you want to link to is visible in the Files panel. I'll be linking to the prebuilt form, explorerinsert2.php.

Click and drag the Point to File tool and drop it onto the target file. That creates the hyperlink. Then I'll save and run the page in an external browser. If you followed these steps and you're prompted to copy the file to the testing server, say Yes. In the page in the browser, here's my new link. I'll click that link and that takes me to the insert form. And then I'll type some values. I'll set the first name to New and the last name to Explorer.

I'll set the date of birth to 12/23/1996. I'll set the e-mail address of new@ explorer.com, I'll leave the address and city blank and I'll set the state to California. I'll click Submit, and that causes the form to navigate back to the list page and I'll see that my new data has been inserted into the database successfully. So an insert hyperlink is very simple. You're just navigating to the form that's going to do the insertion, and then in the form's insert logic, you're navigating back to the list page after the data's been added to the database.

Editing data is a little bit more complex. You'll need to add a hyperlink to each row of the dynamic HTML table. You can either create a new column and create hyperlinks on a particular word like Edit, or you can create hyperlinks on existing data, such as the first name. That's what I'll do. I'll go back to Dreamweaver and then I'll click on the first name column of the rsExplorers record set. You only need to click on this value; you don't need to double- click and you don't need to drag.

Then with the value selected, I'll go down to the Properties panel, just like I did for the insert link and this time I'll use the Browse tool. I'll click Browse for File, in the correct site root. In this case it should be 07_managingdata. Then drill down to the explorers folder and choose the prebuilt version of the update form, explorerupdate2.php. So that added a simple hyperlink to the selected text. But you can actually add logic to pass a variable very easily from the Browse dialog.

I'll click the Browse button again and then down toward the bottom of the dialog I'll click the P arameters button. In the Parameters button you add an name and a value for each value that you want to pass to the update form. You must pass the primary key value to the update form so that it knows which record to display. I'll set the name of the parameter to explorerid, all lowercase. Then I'll click in the Value column and click the lightning bolt and then if it's not already open I'll open up the record set tree, and I'll choose the primary key column explorerId.

I'll click OK, click OK again, and click OK a third time. Then I'll go to Code View and show you the resulting generated code. The HREF attribute starts with the name of the file I'm navigating to and then after a question mark passes the variable named explorerid and sets its value to the column explorerId. Now one very important thing that you have to check is that because PHP variables are case-sensitive, you must make sure that the variable that you pass from this page matches the spelling of the variable you're expecting in the target page.

So now I'll go to the Diles panel and open explorerupdate2.php, and make sure you're looking at it in Code View. Then scroll down in the file to lines 69 through 71. This code was generated by Dreamweaver. Notice that in Dreamweaver it matches the name of the variable to the name of the database column. And if your database column has any uppercase characters, it uses those. I usually like to set all my variables with all lowercase. So to make sure that the two match, in the isset function I'll set explored to all lowercase there.

And then I'll do the same thing on the next line. So now the spelling of the variable in the target file exactly matches the stone of the variable in the sending file. I'll save my changes in both files and then just to be sure that they've both been copied to the server, I'll go to explorerupdate2.php and look at it in Live View. It'll open up to default record, that is, the record with a primary key value of one. Then I'll exit Live View and I'll go to explorerlists.php and I'll open this file in the browser.

Now I should be able to click on any link, and I should see this selected record. I'll click on New for New Explorer. And when the form opens it shows me that record. I'll set the first name value from New to Revised and I'll click Submit. And when the form's logic is completed I'm sent back to the list. And I'll see that the data has been revised. I'll also use this opportunity to fix the first row of my data, which I had a problem with in a previous exercise.

I'll click on Joey in Joey Adams and I'll set the date of birth to 4/15/1993. I'll click Submit, and when I return to the list page, I see the data correctly display. So that's a look at how to tie the components of the data management system together. From the list page you put in a simple hyperlink that takes you to the insert form and you also add in a dynamic URL for each record that passes a query string or a GET variable to the update form.

The update form then displays the existing data, the user can make whatever changes are required, and then when they submit the changes they're saved to the database.

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This video is part of

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Dreamweaver with PHP and MySQL

61 video lessons · 36504 viewers

David Gassner
Author

 
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  1. 8m 48s
    1. Welcome
      1m 25s
    2. What you should know before watching this course
      2m 17s
    3. Using the exercise files
      1m 40s
    4. Understanding the differences between Dreamweaver CS5.5 and CS6
      3m 26s
  2. 19m 31s
    1. Understanding static vs. dynamic web pages
      4m 32s
    2. Selecting application and database servers
      6m 10s
    3. Introducing Apache, MySQL, and PHP
      6m 36s
    4. Installing Apache, MySQL, and PHP
      2m 13s
  3. 39m 34s
    1. Defining a Dreamweaver site
      3m 22s
    2. Configuring a PHP testing server
      7m 48s
    3. Creating and testing a PHP-based web page
      8m 25s
    4. Adding PHP commands with the Insert panel
      3m 14s
    5. Setting and outputting simple variables
      3m 56s
    6. Testing pages with Live view and Live Code view
      2m 9s
    7. Using server-side includes
      7m 50s
    8. Navigating included pages with the Code Navigator
      2m 50s
  4. 36m 37s
    1. Using code hinting with PHP variables
      5m 31s
    2. Understanding PHP custom classes
      6m 38s
    3. Adding Zend Framework to PHP on Windows
      5m 18s
    4. Adding Zend Framework to PHP on Mac
      4m 2s
    5. Using the Site-Specific Code Hints feature
      3m 43s
    6. Using Zend Framework classes with code hints
      7m 26s
    7. Managing reusable code with the Snippets panel
      3m 59s
  5. 18m 27s
    1. Understanding relational databases
      5m 26s
    2. Creating a MySQL database in phpMyAdmin
      4m 41s
    3. Adding data in phpMyAdmin
      2m 46s
    4. Importing a completed database from a script
      5m 34s
  6. 39m 35s
    1. Defining a Dreamweaver database connection
      5m 27s
    2. Building a simple recordset
      4m 31s
    3. Building an advanced recordset
      5m 1s
    4. Displaying data with repeating regions
      6m 4s
    5. Displaying data in a dynamic table
      4m 15s
    6. Formatting dynamic data
      4m 54s
    7. Displaying the total number of records
      2m 4s
    8. Limiting records with paging controls
      4m 5s
    9. Creating conditional regions
      3m 14s
  7. 43m 12s
    1. Building a simple data entry form
      5m 27s
    2. Handling form submissions with PHP
      5m 12s
    3. Creating a customer email form
      3m 9s
    4. Validating form controls with Spry
      7m 54s
    5. Populating a list control with dynamic data
      4m 50s
    6. Working with multiple checkbox controls
      8m 5s
    7. Sending email with Zend_Mail
      8m 35s
  8. 50m 51s
    1. Using data wizards
      6m 20s
    2. Formatting dates for SQL
      5m 27s
    3. Creating a custom data entry form
      4m 50s
    4. Preparing a database table for server behaviors
      3m 3s
    5. Using the Insert Record server behavior
      5m 42s
    6. Preparing an update form
      7m 6s
    7. Using the Update Form behavior
      5m 46s
    8. Creating list page links to edit and update data
      7m 3s
    9. Using the Delete Record server behavior
      5m 34s
  9. 14m 45s
    1. Creating a login form with a PHP server behavior
      6m 29s
    2. Protecting page access with PHP server behaviors
      4m 17s
    3. Logging out with a PHP server behavior
      3m 59s
  10. 22m 50s
    1. Configuring a remote server with FTP credentials
      4m 42s
    2. Synchronizing site assets with the remote server
      5m 27s
    3. Exporting the MySQL database to a script
      3m 8s
    4. Importing the MySQL database on a remote server
      2m 24s
    5. Configuring the site for the remote database
      7m 9s
  11. 52s
    1. Final thoughts
      52s

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