Conditional Statement In Visualforce

conditionalif statementsalesforcevisualforce

I'm trying to display records on a page (not a form) via VisualForce based on a checkbox value.

For example, if checkbox "Active_c" is checked, I would like to display five subsequent fields. If checkbox "Active_c" is not checked, I would like to display nothing.

The only example I can find are display text in the output, however, they don't support displaying multiple field output. For example:

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

Anyone have experience with a conditional?

Best Answer

Apex Controller:

public YourObject__c YourObject { get; set; }

public YourClass(){
    YourObject = [ Select Active__c, Field1__c, Field2__c From YourObject__c Limit 1 ];
}

Visualforce Page:

<apex:actionFunction name="showHideFields" reRender="myFields" />

<apex:inputField value="{!YourObject.Active_c}" onChange="showHideFields()"/>

<apex:outputPanel id="myFields">
    <apex:outputPanel rendered="{!YourObject.Active_c}">
        <apex:outputField value="YourObject.Field1__c" />
        <apex:outputField value="YourObject.Field2__c" />
    </apex:outputPanel>
</apex:outputPanel>

Another example. Without reRendering, just checking the value of the checkbox on the runtime:

<apex:outputPanel>
    <apex:outputField value="YourObject.Field1__c" rendered="{!YourObject.Active_c}" />
    <apex:outputField value="YourObject.Field2__c" rendered="{!YourObject.Active_c}" />
</apex:outputPanel>

1. Ternary operator:

As suggested by @Kirk in the comments, the cleanest way of doing this would be to use a ternary operator as follows:

<span>{{isLarge ? 'video.large' : 'video.small'}}</span>

2. `ng-switch` directive:

can be used something like the following.

<div ng-switch on="video">
    <div ng-switch-when="video.large">
        <!-- code to render a large video block-->
    </div>
    <div ng-switch-default>
        <!-- code to render the regular video block -->
    </div>
</div>

3. `ng-hide` / `ng-show` directives

Alternatively, you might also use ng-show/ng-hide but using this will actually render both a large video and a small video element and then hide the one that meets the ng-hide condition and shows the one that meets ng-show condition. So on each page you'll actually be rendering two different elements.

4. Another option to consider is `ng-class` directive.

This can be used as follows.

<div ng-class="{large-video: video.large}">
    <!-- video block goes here -->
</div>

The above basically will add a large-video css class to the div element if video.large is truthy.

UPDATE: Angular 1.1.5 introduced the `ngIf directive`

5. `ng-if` directive:

In the versions above 1.1.5 you can use the ng-if directive. This would remove the element if the expression provided returns false and re-inserts the element in the DOM if the expression returns true. Can be used as follows.

<div ng-if="video == video.large">
    <!-- code to render a large video block-->
</div>
<div ng-if="video != video.large">
    <!-- code to render the regular video block -->
</div>

Best Answer

Related Solutions

Python’s equivalent of && (logical-and) in an if-statement

Angularjs – if else statement in AngularJS templates

1. Ternary operator:

2. ng-switch directive:

3. ng-hide / ng-show directives

4. Another option to consider is ng-class directive.

UPDATE: Angular 1.1.5 introduced the ngIf directive

5. ng-if directive:

Related Topic

2. `ng-switch` directive:

3. `ng-hide` / `ng-show` directives

4. Another option to consider is `ng-class` directive.

UPDATE: Angular 1.1.5 introduced the `ngIf directive`

5. `ng-if` directive: