[SalesForce] How to get a components attribute on the page and set it to a page property

I have an apex:Component and I want to get its attributes value in the page

<apex:component id="Job_Applicant_Details" controller="Job_Applicant_DetailsController">
<apex:attribute name="fName" type="String" assignTo="{!FullName}" description="Fullname of the applicant"/>

<apex:outputpanel id="panel" >
    <apex:form id="frmApplicant">
        <apex:outputlabel value="Name"/><br></br>
        <apex:inputtext id="FullName" value="{!fName}"/>
</apex:form>
</apex:outputpanel>

</apex:component>

I have a VF page and I want to set the fname attribute to the page property. I have couple of other common fields on this component and I want to access values and set it to a property on my VF page, so I can save them.

Here is my apex page

  <c:Job_Applicant_Details/>
        <apex:form >
            <apex:outputpanel >
                        <apex:outputlabel value="Skills"/>
                        <br></br>
                       <apex:inputfield id="Skills" value="{!Job_Applicant_Details__c.Skills}"/>
                        <br></br>
                   <apex:commandbutton id="btn_submit" value="Submit"/>
            </apex:outputpanel>
            </apex:form>

Its a page with a component and other input fields on the page. I want to either pass the components attributes as parameters to the page or get its value and set it to the page properties.

Best Answer

Cannot take credit for this :

How do I pass a parameter from component to a Visualforce page?

Since your component lives separated from the page any change on the component never calls the controller thereby the value of the fullname string is never set. To overcome this we use an action support to call the controller on the input field change event,

controller: ( Add your extra code over this)

public class Job_Applicant_DetailsController {
public string FullName{get;set;}
// This method is nothing but a dummy method to support the action support.
public void updateFname(){
}
}

component:

<apex:component id="Job_Applicant_Details" controller="Job_Applicant_DetailsController">
<apex:attribute name="fName" type="String" assignTo="{!FullName}" description="Fullname of the applicant"/>
<apex:outputpanel id="panel" >
    <apex:form id="frmApplicant">
        <apex:outputlabel value="Name"/><br></br>
        <apex:inputtext id="FullName" value="{!fName}">
            <apex:actionsupport event="onchange" action="{!updateFname}"/>
        </apex:inputtext>
</apex:form>
</apex:outputpanel>

Page:

<apex:page controller="Job_Applicant_DetailsController">
<c:comp_Test fName="{!FullName}"/>
Value passed from component :<b style="color:red">{!Fullname}</b> <br/>
        <apex:form >
            <apex:outputpanel >
                        <apex:outputlabel value="Skills"/>
                        <br></br>
                        <br></br>
                   <apex:commandbutton id="btn_submit" value="Submit"/>
            </apex:outputpanel>
            </apex:form>
</apex:page>

enter image description here

Related Solutions

[SalesForce] Can we use a custom Visualforce component twice on the same Visualforce page

Because i don't realy understand your actual problem without any code provided i can only guess. But here are some general minds to this topic.

It works fine until the component don't have "static" elements like css styles or javascript functions whith remain the same (visualforce objects like output panels get unique ids).

For example we have the following component "MyComponent":

<apex:component>
    <apex:attribute name="customColor" type="String" required="false"/>

    <style>
        .myStyle { color:{!customColor}; }
    </style>

    <apex:outputText styleClass="myStyle" value="Please click here" />
</apex:component>

Now we will insert this component twice at our page and give two different values for the "customColor". First one we want to get red color, for the second one - green:

<apex:page>
    Text 1: <c:MyComponent customColor="red" /> <br/>
    Text 2: <c:MyComponent customColor="green" />
</apex:page>

The result looks like this:

enter image description here

This is because the same css style was rendered twice at the main page and the second one won, that is overrides the first style. The same thing happens with javascript functions.

To work around this problem just insert an unique id attribute to the component and provide each static object with this parameter. Our component will look then like this:

<apex:component>
    <apex:attribute name="id" description="The unique id" type="String" required="true"/>
    <apex:attribute name="customColor" description="" type="String" required="false"/>

    <style>
        .myStyle{!id} { color:{!customColor}; }
    </style>

    <apex:outputText styleClass="myStyle{!id}" value="Please click here" />
</apex:component>

At the page we must to enter an id for each instance of component:

<apex:page>
    Text 1: <c:MyComponent id="First" customColor="red" /> <br/>
    Text 2: <c:MyComponent id="Second" customColor="green" />
</apex:page>

And now our main page will be rendered correctly, because each has an unique id:

enter image description here

[SalesForce] Disabled attribute not present for apex:inputfield. Any alternatives

In your VF page, use both components, inputField and outputField with opposite rendering condition. What you have to pay attention to is to update the components everytime an action specified in actionSupport is called. You can do so by wrapping both inputField and outputField components in an outputPanel and specifying the outputPanel's ID as the element to rerender on actionSupport's finish.

<apex:selectList id="birthPlace" value="{!birthPlace}">
    <apex:selectOption itemLabel="--None--" itemValue="none" />
    <apex:selectOption itemLabel="Poland" itemValue="pld" />
    <apex:selectOption itemLabel="Europe" itemValue="erp" />
    <apex:actionSupport event="onchange" action="{!boolChange}" rerender="nameFields" />
</apex:selectList>
<apex:outputPanel id="nameFields">
    <apex:outputField label="Name" value="{!Chopin}" rendered="{!pianoBool}" />
    <apex:inputField label="Name" value="{!Chopin}" rendered="{!NOT(pianoBool)}" />
</apex:outputPanel>

Hope it helps!

Best Answer

Related Solutions

[SalesForce] Can we use a custom Visualforce component twice on the same Visualforce page

[SalesForce] Disabled attribute not present for apex:inputfield. Any alternatives

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