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When you deploy the page in a production environment, or if you switch off development mode, the editor will no longer be available.

Find All Visualforce Pages

Now that you’ve created a Visualforce page, you’ll need to know where to find it.

1. From Setup, enter Visualforce Pages in the Quick Find box, then select Visualforce Pages.

2. Scroll down to locate the page created in Step 2—hello.

This views your page, and even allows you to edit it. However, this editor is different from the one we’ve seen in the previous steps—it

also doesn’t let you immediately view the changes (unless you have the page open in a separate tab).

Alternative Page Creation

You can also create a new page from this listing, and then edit it just like you did in Step 2 by navigating to the correct URL—taking into

account the name of the page you created. Try it!

1. From Setup, enter Visualforce Pages in the Quick Find box, then select Visualforce Pages, then click New.

2. Create and label the page hello2.

3. Click Save.

4. Navigate to the new page using the URL as you did in Step 2: https://your-salesforce-instance/apex/hello2

The Visualforce editor in Setup is good to know about, and a great way to see all your pages. However, the Development Mode editor

we used in previous steps is more powerful, and lets you view your changes immediately. We’ll use it for the rest of this section of the

workbook.

Summary

You now know how to enable development mode, and list and create Visualforce pages. In the next tutorial, you’ll learn a little about

the page editor, and the basics of Visualforce components, which are the building blocks of any page.

Adding Attributes and Using Auto-Suggest

The page you created in Tutorial #1 shares a characteristic of every Visualforce page—it starts and ends with the <apex:page> tag.

<apex:page> is actually a Visualforce component—and one that must always be present. So all Visualforce pages will look similar

to this:

<apex:page>

Your Stuff Here

</apex:page>

Note the use of angle brackets, as well as how you indicate where a component starts and ends. The start is simply the component name

in angle brackets: <apex:page>. The end is the component name prepended with a ‘/’ character in angle brackets: </apex:page>.

All Visualforce pages follow this same convention—requiring that the pages you create be “well-formed XML” (with a few exceptions).

A few components are self-closing—they have this form: <apex:detail /> (note the position of the /). Think of that as a start

and end tag wrapped up in one!

You can generally modify the behavior and/or appearance of a component by adding attributes. These are name/value pairs that sit

within the start tag. For example, here’s an attribute: sidebar="false".

Find All Visualforce Pages

Introduction to Visualforce

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Add Attributes Using Auto-Suggest

Let’s play some more with our first hello page. It turns out that the sidebar attribute is a valid attribute for the <apex:page> component.

1. Add sidebar="false" within the start tag of the <apex:page> component as follows:

<apex:page sidebar="false">

2. Click Save.

Notice that the left hand area of your page has changed—the sidebar has been removed. In effect, the sidebar attribute modifies

the behavior and appearance of the <apex:page> component.

3. Position your cursor just after the final quotation mark ("), and hit the space bar. A helpful list of attributes pop up that are valid for

the <apex:page> component. Choose the showHeader attribute.

4. The attribute is automatically added to your page, and you now need to supply a value for the attribute. Add false. Your complete

first line should look like this:

<apex:page sidebar="false" showHeader="false">

5. Click Save (remember, you can also press CTRL+S as a shortcut).

This time your page looks completely different. By setting the showHeader attribute to false, you’ve not only removed the top

header, but all the default styling associated with the page.

Let’s put it back the way it was—having the top header is very useful during development.

6. Change the showHeader attribute’s value to true.

7. Click Save.

Add Attributes Using Auto-Suggest

Introduction to Visualforce

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Add Additional Components

You’ve created a page, used the <apex:page> component, and changed its behavior. You’ll typically want to use additional

components that supply a lot more functionality.

Visualforce comes with a several dozen built-in components, and you can install and build your own components to extend this set. In

this lesson you’ll learn how to locate them, and use one.

1. Click the Component Reference link in the Page Editor. A help popup window displays with all available components.

2. Click <apex:pageBlock>. A description of what the component does, and what attributes you can add to change its behavior

displays in the Component Details tab.

3. Click the Usage tab to see an example of how to use the component. You’ll notice that the <apex:pageBlock> component

is often used with the <apex:pageBlockSection> component. Click <apex:pageBlockSection> to learn more

about that component.

In general, you’ll dip into the component reference whenever you need to. You’ll soon learn what the major components do—and

while some of them take a large number of attributes, in practice you will only use a handful.

Now add both components to your page. We’re going to go a little faster here—see if you can do this without looking at the final

code below.

4. Within the <apex:page> component, add an <apex:pageBlock> component with a title attribute set to A Block

Title.

5. Within the <apex:pageBlock> component, add an <apex:pageBlockSection> component, with its title attribute

set to A Section n Title.

6. Within the <apex:pageBlockSection>, add some text, like I'm three components s deep!

7. Click Save. Your final code will look something like this:

<apex:page sidebar="false">

<apex:pageBlock title="A Block Title">

<apex:pageBlockSection title="A Section Title">

I'm three components deep!

</apex:pageBlockSection>

</apex:pageBlock>

</apex:page>

The final page will look something like this:

You can click the tiny disclosure triangle next to A Section Title to minimize that section of the block.

Add Nested Components

Adding additional components is easy.

Add Additional Components

Introduction to Visualforce

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1. Navigate to the end of the <apex:pageBlockSection> component, and add another <apex:pageBlockSection>

component with its own title. Both <apex:pageBlockSection> components must be contained within the same

<apex:pageBlock> component.

2. Click Save and admire your handiwork.

<apex:page sidebar="false">

<apex:pageBlock title="A Block Title">

<apex:pageBlockSection title="A Section Title">

I'm three components deep!

</apex:pageBlockSection>

<apex:pageBlockSection title="A New Section">

This is another section.

</apex:pageBlockSection>

</apex:pageBlock>

</apex:page>

Note the number of “nested” components. The start and the end tag for an <apex:pageBlockSection> are both within the

start and end tag for the <apex:pageBlock> component. And your first <apex:pageBlockSection> ends before the next

one starts (its end tag, </apex:pageBlockSection>, appears before the start of the new one, <apex:pageBlockSection>).

All of the components on a Visualforce page tend to nest in this way—and the editor tells you when you’ve made a mistake (for example,

if you forget an end tag).

Summary

In this tutorial you learned how to change the behavior and appearance of Visualforce components by adding attributes, how to use

the auto-suggest feature of the editor, and how to use the Component Reference to look up additional components. You also learned

that Visualforce components are often nested within each other.

Learning More

Here are additional Visualforce components that let you build pages that match the platform visual style:

• <apex:pageBlockButtons> lets you provide a set of buttons that are styled like standard user interface buttons

•

The optional <apex:pageBlockSectionItem> represents a single piece of data in a <apex:pageBlockSection>

• <apex:tabPanel>, <apex:toolbar>, and <apex:panelGrid> provide other ways of grouping information on a page

Understanding Simple Variables and Formulas

The Visualforce pages you’ve created so far have been static. In general, Visualforce pages are dynamic—they can display data retrieved

from the database, or data that changes depending on who is logged on and viewing the page. They can become dynamic through

the use of variables and formulas.

This tutorial introduces you to variables, formulas and the expression language syntax used in Visualforce. Variables typically contain

information that you have retrieved from objects in the Force.com database, or which the platform has made available to you—for

example, the name of the logged-in user. A number of built-in formulas are available to add functionality to your page—you’ll discover

some basic formulas in this tutorial too.

Summary

Introduction to Visualforce

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Global Variables

Force.com retains information about the logged-in user in a variable called User. You can access fields of this User variable (and any

others) by using a special expression language syntax: {! $<global l variable>.<field name>}

1. Modify your existing page to include the following line: {! $User.FirstName}. Remember that any content must lie within

the <apex:page> component (between its open and closing tags).

2. Click Save.

Your Visualforce page looks something like this:

<apex:page sidebar="false">

{! $User.FirstName}

</apex:page>

In the future we’ll assume that you know to put any Visualforce markup within the <apex:page> tag. We’ll also assume that by now

you’re comfortable enough to “Click Save” and view the result as well!

The {! ... } tells Visualforce that whatever lies within the braces is dynamic and written in the expression language, and its value

must be calculated and substituted at run time when someone views the page. Visualforce is case-insensitive, and spaces within the

{! ... } syntax are also ignored. So this is just as effective: {!$USER.firstname}.

Here’s how to show the first name and last name of the logged-in user: {! $User.FirstName} {! $User.LastName}

Basic Formulas

Visualforce lets you embed more than just variables in the expression language. It also supports formulas that let you manipulate values.

The & character is the formula language operator that concatenates strings.

1. Add this to your Visualforce page: {! $User.firstname e & ' ' ' ' & $User.lastname}

This tells Visualforce to retrieve the firstname and lastname fields from the global User object, and to concatenate them with a space

character. The output will be something like: Joe Bloggs.

In general, formulas are slightly more advanced and have a simple syntax that includes the function name, a set of parentheses, and

an optional set of parameters.

2. Add this to your Visualforce page:

Today's Date is {! TODAY()}

Next week it will be {! TODAY() + 7}

You’ll see something like this in the output:

Today's Date is Wed Feb 08 00:00:00 GMT 2012

Next week it will be Wed Feb 15 00:00:00 GMT 2012

The tags are standard HTML for creating paragraphs. In other words, we wanted both sentences to be in individual paragraphs,

not all on one line. The TODAY() function returns the current date as a date data type. Note how the time values are all set to 0.

Also note the + operator on the date. The expression language assumes you want to add days, so it added 7 days to the date.

3. You can use functions as parameters in other functions, and also have functions that take multiple parameters too. Add this:

The year today is {! YEAR(TODAY())}

Tomorrow will be day number

{! DAY(TODAY() + 1)}

Let's find a maximum: {! MAX(1,2,3,4,5,6,5,4,3,2,1)}

Global Variables

Introduction to Visualforce

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The square root of 49 is {! SQRT(49)}

Is it true? {! CONTAINS('salesforce.com', 'force.com')}

The output will look something like this:

The year today is 2012

Tomorrow will be day number 9

Let's find a maximum: 6

The square root of 49 is 7.0

Is it true? true

The CONTAINS() function returns a boolean value: something that is either true or false. It compares two arguments of text and

returns true if the first argument contains the second argument. If not, it returns false. In this case, the string “force.com” is contained

within the string “salesforce.com”, so it returns true.

Conditionals

Sometimes you want to display something dynamically, based on the value of an expression. For example, if an invoice has no line items,

you might want to display the word “none” instead of an empty list, or if some item has expired, you might want to display “late” instead

of showing the due date.

You can do this in Visualforce by using a conditional formula expression, such as IF(). The IF() expression takes three arguments:

•

The first is a boolean: something that is either true or false. You’ve seen an example of that in the CONTAINS() function.

• The second argument is something that will be returned if the boolean is true.

•

The third argument is something that will be returned if the boolean is false.

Insert the following and try to predict what will be displayed if you save the page:

{! IF ( CONTAINS('salesforce.com','force.com'), 'Yep', 'Nah') }

{! IF ( DAY(TODAY()) > 14, 'After the 14th', 'On or before the 14th') }

You’ll see something like this:

Yep

On or before the 14th

Of course, this all depends on when you run the code. After the 14th in a month, it looks different.

Summary

Visualforce lets you embed operations that evaluate at runtime using a special expression language syntax: {! expression}. Global

variables are accessed using the $VariableName syntax. The expression language lets you manipulate strings, numbers, text, and

dates, as well as conditionally execute operations.

Learning More

• The Formulas Cheat Sheet provides a concise guide to the many formulas you can use.

•

The Visualforce Developer’s Guide has a lot more detail on formulas.

Conditionals

Introduction to Visualforce

Using Standard Controllers

Visualforce’s Model-View-Controller (MVC) design pattern makes it easy to separate the view and its styling from the underlying database

and logic. In MVC, the view (the Visualforce page) interacts with a controller. In our case, the controller is usually an Apex class, which

exposes some functionality to the page. For example, the controller can contain the logic to be executed when a button is clicked. A

controller also typically interacts with the model (the database)—making available data that the view might want to display.

Most Force.com objects have default standard controllers that can be used to interact with the data associated with the object, so in

many cases you don’t need to write the code for the controller yourself. You can extend the standard controllers to add new functionality,

or create custom controllers from scratch. In this tutorial, you’ll learn about the standard controllers.

Find Identifiers of Records

When your Visualforce pages interact with other pages in your application, you can automatically pass in the record’s identifier, and your

Visualforce page can then display that data. Right now your pages are stand-alone, so for your page to display data from a record in the

database, it needs to know the record’s identifier.

Your Developer Edition environment has a number of objects that store data, available out of the box.

1. For example, switch to the Sales application by choosing Sales from the drop down.

2. Now select the Accounts tab. Ensure the pick list shows All Accounts and click Go to view all the account records.

3. Click Burlington Textiles (or any other record) to view the details. Your screen displays all the details for that account:

Using Standard Controllers

Introduction to Visualforce

Notice that your URL has changed—it now looks something like this: https://<your salesforce

instance>.salesforce.com/0018000000MDfn1

The identifier is that series of digits at the end, in this case, 0018000000MDfn1. The identifier, or ID as it’s often written, is unique across

all records in your database. If you know the ID for any record, and have permission, you can often construct a URL to view it by replacing

0018000000MDfn1 with the record’s identifier.

When you visited https://<salesforce instance>.salesforce.com/0018000000MDfn1, Force.com automatically

retrieved the record with identifier 0018000000MDfn1 from the database, and automatically constructed a user interface for it. In the

other lessons in this tutorial, you’re going to take away some of the automation, and create your own user interface.

Display Data from a Record

Create a new Visualforce page, accountDisplay, with the following content:

<apex:page standardController="Account">

Hello {! $User.FirstName}!

You are viewing the {! account.name} account.

</apex:page>

You’ll recognize the {! } expression syntax from the previous tutorial, and that $User.FirstName refers to the First Name field

of the User global variable. There are a few new things though:

1. The standardController="Account" attribute tells Visualforce to use an automatically-generated controller for the

Account object, and to provide access to the controller in the Visualforce page.

2. The {! account.name} expression retrieves the value of the account variable’s name field. The account variable is automatically

made available by the standard controller (it’s named after the standard controller’s name).

Controllers generally have logic that handles button clicks and interacts with the database. By using the standardController

attribute, your Visualforce page has access to a rich controller that is automatically generated for you.

The standard controller for the Account object determines when an identifier is being used in the page, and if it is, queries the database

and retrieves the record associated with that identifier. It then assigns that record to the account variable so that you can do as you

please with the data in your Visualforce page.

Display Data from a Record

Introduction to Visualforce

When you click Save, you will see your first name and an empty account name. This is because you haven’t told the Visualforce page

which account record to display. Go to your URL and modify it so that you include the ID from Step 1. So instead of something like:

https://na3.salesforce.com/apex/accountDisplay

change it to something like:

https://na3.salesforce.com/apex/accountDisplay?id=0018000000MDfn1

In your case, change the identifier 0018000000MDfn1 to whatever you found in Step 1. You might need to change “na3” as well, to

whatever your salesforce instance currently is.

Now when you save your work, the account name displays:

Display Other Fields

Your accountDisplay page only displays the name field of the Account object. To find other fields to display for the object, from

the object management settings for accounts, go to the fields area. Click any field, such as Ticker Symbol. The Field Name field provides

the name that you can use in your own Visualforce pages. For example, for this particular field, the name is TickerSymbol.

Modify accountDisplay to include this field by adding the following paragraph after the existing one:

Here's the Ticker Symbol field: {! account.TickerSymbol}

Display Fields from Related Records

You can also display data from related records. For example, while viewing the object details for Account, you might have noticed that

the Account object has a field called Account Owner, and that its type is Lookup(User). In other words, this field has a relationship to a

User record. By clicking the Account Owner field label link, you’ll discover its Field Name is Owner.

The Owner relationship represents a User. And, if you go to the fields area from the object management settings for users, you’ll find

that User has a Name field. Let’s use this information to display it.

1. Modify accountDisplay to include this field by adding the following paragraph after the existing one:

Here's the owner of this account: {! account.Owner.Name}

The “dot notation” (account.Owner.Name) indicates that you want to traverse the relationship between the records. You know

that account.Owner indicates the Owner field of the account record. The extra name at the end indicates that the owner field isn’t

a simple field representing a String, but a relationship to another record (it’s a Lookup(User)), and that you’d like to get the record

represented by the value of the Owner field (it’s a User record), and display the Name field on that record.

Tip: If you’ve created your own custom objects (instead of using objects like Account) and want to know how to reference a field,

you have to follow a slightly different procedure. Go to the management settings for custom objects. Then select your object, and

then the field. The API Name now indicates the name of the field that you must use in your Visualforce pages. For example, if your

field was called Foo, its API Name is Foo__c, and you’d reference it with that name—something like:

{! myobject__c.foo__c}.

Display Other Fields

Introduction to Visualforce

Summary

Standard controllers provide basic, out-of-the-box, controller functionality, including automatic record retrieval. This tutorial showed

how to locate the identifier for a record and use the standard controller to display the record’s data. The standard controller also contains

functionality to save or update a record, which you’ll see later.

Learning More

Visualforce also supports standard list controllers, which allow you to create Visualforce pages that can display or act on a set of records,

with pagination.

Using Standard User Interface Components

In Adding Attributes and Using Auto-Suggest you learned about the <apex:pageBlockSection> component, and in the

previous tutorial you learned how to show some data from an Account record using the expression language. In this tutorial you’ll

discover additional Visualforce components that produce output that looks and feels like the automatically-generated user interfaces.

Display a Record or Related Lists

Creating a list of records is as easy as typing up a single component.

1. Modify your accountDisplay Visualforce page to look like this:

<apex:page standardController="Account">

<apex:detail/>

</apex:page>

If you access your page with a valid account ID passed in as a parameter, as demonstrated in the previous tutorial (it will look

something like this: https://na3.salesforce.com/apex/AccountDisplay?id=0018000000MDfn1), then

you’ll see a lot of output.

2. The <apex:detail/> component displays the standard view page for a record. It shows related lists as well, such as contacts.

You can switch these off by adding the relatedList="false" attribute. Try adding it, click Save, and spot the difference.

3. You can show only a particular related list; such as the list of case records that are related to the account record you are viewing.

Add the following tag:

<apex:relatedList list="Cases" />

Although these tags are very simple, they’re doing a lot of work for you—and relying on that standard controller to go and retrieve the

data. Sometimes, however, you want more control over page layout.

Summary

Introduction to Visualforce

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