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srikanthpallasrikanthpalla 

what is dynamic picklist

how we will create dynamic picklist in vfpage
Amit Chaudhary 8Amit Chaudhary 8
Example 1:-
Using Dynamic Apex to retrieve Picklist Values
https://developer.salesforce.com/blogs/developer-relations/2008/12/using-the-metadata-api-to-retrieve-picklist-values.html

The only thing left for us to do is map the picklist values into an <apex:selectOptions> tag can use for display. Here is the entire method from our controller to do this:
public List<SelectOption> getCountries()
{
  List<SelectOption> options = new List<SelectOption>();
        
   Schema.DescribeFieldResult fieldResult =
 OfficeLocation__c.Country__c.getDescribe();
   List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();
        
   for( Schema.PicklistEntry f : ple)
   {
      options.add(new SelectOption(f.getLabel(), f.getValue()));
   }       
   return options;
}

With our controller logic all complete, we can call the getCountries() method from our Visualforce page,  and populate the <apex:selectList> tag:
<apex:selectList id="countries" value="{!Office_Location__c.Country__c}"
         size="1" required="true">
  <apex:selectOptions value="{!countries}"/>
</apex:selectList>

Example 2:-
http://www.forcetree.com/2009/06/dynamically-add-values-to-picklist.html
https://www.minddigital.com/how-to-create-dynamic-dependent-picklist-of-objects-within-salesforce/

Let us know if this will help you

Thanks
Amit Chaudhary