How to HIDE selective values in a multipick list field at visualforce page according to logged in user

Question

I have a multi-select picklist field 'PermissionsAllowed' at object 'AssignPermissions' with 4 values 'Country A User' , 'Country A Processor', 'Country B User'and 'Country B Processor'.

Now according to the user's country, he should see only relevant picklist value options and hide other two values.For Example, If the user is from Country A , he/she should see only 'Country A User' and 'Country A Processor' as values in multi-select picklist option.

How can we do this?

PS - here the focus is on 'how to hide selective values from multi select picklist ' thus you can ignore on filter part (based on country).

Answer 1

Using DescribeFieldResult you can get all the values and based on the logic you can filter the necessary values : -

public List<SelectOption> getCountryUser(){

    List<SelectOption> countryUser = new List<SelectOption>();
    Schema.DescribeFieldResult countryUserPkVal = Schema.ObjectName.FieldName.getDescribe();
    List<Schema.PicklistEntry> ple = countryUserPkVal.getPicklistValues();
    countryUser.add(new SelectOption('--None--', '--None--'));
    for(Schema.PicklistEntry f : ple){
        //Your Logic to check Logged in User Country and what you want show in the VF page      
        countryUser.add(new SelectOption(f.getLabel(), f.getValue()));
    } 
    return countryUser;           
}

Answer 2

Answer - It doesn't seems possible to use the standard multi select pick list and hide values at UI.

Turnaround - You can create multi-select picklist using 2 selectLists one for Values Available and another for Selected Values to show only desired values from custom field at object ; Use two buttons in between those to select or deselect.

How do you do this ?

Following below Steps -

1. take all the values from the picklist using DescribeFieldResult() and filter necessary values. See below code to do this.

   public List<SelectOption> getToSelectValues(){ List<SelectOption> countryUser = new List<SelectOption>(); Schema.DescribeFieldResult countryUserPkVal = Schema.ObjectName.FieldName.getDescribe(); List<Schema.PicklistEntry> ple = countryUserPkVal.getPicklistValues(); for(Schema.PicklistEntry f : ple){ //Your Logic to filter picklist values
if(!rightvalues.contains(f.getLabel()) ) countryUser.add(new SelectOption(f.getLabel(), f.getValue())); } return countryUser;
}

   2. For select button write below code

public PageReference selectclick(){ rightselected.clear(); for(String s : leftselected){ leftvalues.remove(s); rightvalues.add(s); } return null; }

3. To get selected values use below function

   public List getSelectedValues(){ List options1 = new List(); List tempList = new List(); tempList.addAll(rightvalues); tempList.sort();
   for(String s : tempList) options1.add(new SelectOption(s,s)); return options1; }

4. for deSelect/unselect use below code

   public PageReference unselectclick(){ leftselected.clear(); for(String s : rightselected){ rightvalues.remove(s); leftvalues.add(s); } return null; }

5. Finally to the VisualForce page, paste below code

<apex:panelGrid columns="3" id="panelGridId"> <apex:selectList id="sel1" value="{!leftselected}" multiselect="true" style="width:223px" size="4"> <apex:selectOptions value="{!ToSelectValues}" id="firstOptions" /> </apex:selectList> <apex:panelGroup > <br/> <apex:image url="{!$Resource.selectImage}" height="20px" style="cursor:pointer;"> <apex:actionSupport event="onclick" action="{!selectclick}" reRender="panelGridId"/> </apex:image> <br/><br/> <apex:image url="{!$Resource.unSelectImage}" height="20px"> <apex:actionSupport event="onclick" action="{!unselectclick}" reRender="panelGridId"/> </apex:image> </apex:panelGroup> <apex:selectList id="sel2" value="{!rightselected}" multiselect="true" style="width:223px" size="4"> <apex:selectOptions value="{!SelectedValues}" /> </apex:selectList>

PS- do not forget to define the variables and initialize them before using

Public List<string> leftselected{get;set;}
Public List<string> rightselected{get;set;}
Set<string> leftvalues = new Set<string>();
Set<string> rightvalues = new Set<string>();