I am trying to hide Stage field of opportunity from visualforce page but I am not able to achieve the task.
If I am using style="display:none" nothing is happening and if I am using rendered="false” I am getting error as “The inline edit-enabled dependent picklist 'Lost Reasons' requires its controlling field 'Stage' to be present on the page.” Please help me regarding this ASAP.

I have used the below code. Please let me know if I am missing out something.


<apex:page standardController="Opportunity" docType="html-5.0" id="TheOppPage" tabStyle="Opportunity" showChat="false">
    <apex:form >
        <apex:pageBlock mode="maindetail"  id="thePageBlockDetail1" rendered="{!opportunity.StageName = 'Closed Won' || opportunity.StageName = 'Closed Lost'}">
          
            <!-- All Buttons are defined here-->
            <apex:pageBlockButtons >
                <apex:commandButton action="{!edit}" id="editButton" value="Edit" style="display:none"/>
                <apex:commandButton action="{!save}" id="saveButton" value="Save" style="display:none"/>
                <apex:commandButton action="{!delete}" id="deleteButton" value="Delete" style="display:none"/>
                <apex:commandButton action="{!cancel}" id="cancelButton" value="Cancel" style="display:none" />
            </apex:pageBlockButtons>
          
            <!--Main details of this opportunity are defined here. -->
          
            <apex:pageBlockSection id="thePageBlockSectionDetail1">
                <apex:inlineEditSupport showOnEdit="saveButton, cancelButton" hideOnEdit="editButton, deleteButton" event="ondblclick"
                    changedStyleClass="myBoldClass" resetFunction="resetInlineEdit" />
                  
                <apex:outputField value="{!opportunity.StageName}" style="display:none"/>
                <apex:outputField value="{!opportunity.Won_Reasons__c}" rendered="{!opportunity.StageName = 'Closed Won'}"/>
                <apex:outputField value="{!opportunity.Lost_Reasons__c}" rendered="{!opportunity.StageName = 'Closed Lost'}"/>
                <apex:outputField value="{!opportunity.customfield1__c}" rendered="{!opportunity.StageName = 'Closed Lost'}"/><br/>
                <apex:outputField value="{!opportunity.customfield2__c}" rendered="{!opportunity.StageName = 'Closed Lost'}"/>    
            </apex:pageBlockSection>
        </apex:pageBlock>
    </apex:form>
</apex:page>


Thanks in advance!
:)

Regards,
R_Shri