List<Dev_Request__c> lstDevRequests;
public String selectedStatus{get;set;}


public tableDevRequests() {

}


public List<SelectOption> getStatus() {
    List<SelectOption> statOptions= new List<SelectOption>();
    statOptions.add( new SelectOption('','--All Status--'));
    for( Dev_Request__c dev : [select Id,Status__c from Dev_Request__c ] ) {
        statOptions.add( new SelectOption(dev.Id,dev.Status__c)); /*SelectOption list takes two parameters one is value and other one is label .In this case account name as a label and Id is the value .*/
    }
    return statOptions;
}



public List<Dev_Request__c> getlstDevRequests() {
    if(lstDevRequests == null)
        lstDevRequests = [Select Id, Name, Assignee__c, Assignee__r.Name, Start_Date__c, Due_Date_QA__c, Estimated_Hours__c, Estimated_Completion_Date__c, Status__c, Overview__c, Parent_Dev_Request__c, (SELECT Id, WhatId, ActivityDAte, Owner.Name, Description, Status, Subject from Tasks) from Dev_Request__c];
    return lstDevRequests;
}