Hi Eveyone,

I am currently working on an addition requirements and I could not get it to work. Can anyone give me any idea how to achieve below requirement?

Object1 = SMS_Data__c
Object2 = SMS_Data_Template__c

I created a VF page for SMS Data, it has a field called Text_Message__c. Now I added a drop down list on that VF page of all active SMS_Data_Template__c records but for some reason it does not rerender the field.

Here is the suppossedly end result.

SMS_Data__c.Text_Message__c = SMS_Data_Template__c.Text_Message__c;

Please see my codes below:

<!-- Class -->
public SMS_Data_Template__c sdl{get;set;}
public String selectedtemplateId{get;set;}

public List<SelectOption> getListOftemplates(){
           List<SMS_Data_Template__c> TemplateList = [select id,Name,Text_Message__c from SMS_Data_Template__c WHERE Active__c=True] ;
           System.debug('Templates'+TemplateList.size());
           List<SelectOption> TemplateOptionList = new List<SelectOption>();
           TemplateOptionList .add(new SelectOption( ' ' ,'--Select--'));
           for(SMS_Data_Template__c sdl: TemplateList )
           {
                      TemplateOptionList .add(new SelectOption(sdl.id , sdl.Name));
           }
          return TemplateOptionList ;
    }
    public pagereference gettemplate(){
          sdl = [select id,Text_Message__c from SMS_Data_Template__c where id=:selectedtemplateId];
          return null;

<!-- Visualforce Page -->
<apex:pageBlockSectionItem >
<apex:outputlabel value="Select a Template" for="SelectTemplate"/>
<apex:actionRegion >
<apex:selectList value="{!selectedtemplateId}" size="1" multiselect="false" id="SelectTemplate">
<apex:selectOptions value="{!ListOfTemplates}"/>
<apex:actionSupport event="onchange" rerender="Template1" />
 </apex:selectList>
</apex:actionRegion>
</apex:pageBlockSectionItem>

<apex:pageBlockSection columns="1"  collapsible="true" id="Template1" rendered="true">
<apex:inputtextarea rendered="{!sdl<>null}" value="{!sd.Text_Message__c==sdl.Text_Message__c}" style="width: 600px;"/>
<apex:inputtextarea rendered="{!sdl<>null}" value="{!sdl.Text_Message__c}" style="width: 600px;"/>
 </apex:pageBlockSection>

Both of the inputtextarea returns null even i have already selected a SMS Data Template record.

Thank you in advance to anyone who can point me to the right direction.