Displaying Visualforce Components from Apex Class using DynamicComponent

Here i am trying to explain to display the visualforce components from apex class by using DynamicComponent Tag.

On every component we have

Dynamic Visualforce Notation in component reference for example

for <apex:inputField> we have Dynamic Visualforce Notation is Component.Apex.InputField

By using this type of notations i build search page for searching Account records by account name.
By using this we can control the visualforce components from Apex Class.

Controller:
=============
public with sharing class DynamicComponentExample11 {
    public DynamicComponentExample11(ApexPages.StandardController con) { }
    public string enterstring{get;set;}
    public List<Account> lstaccount{get;set;}
    public Component.Apex.SectionHeader getHeaderWithDueDateCheck() {
        date dueDate = date.newInstance(2011, 7, 4);
        boolean overdue = date.today().daysBetween(dueDate) < 0;

        Component.Apex.SectionHeader sectionHeader = new Component.Apex.SectionHeader();
        if (overdue) {
            sectionHeader.title = 'This Form Was Due On ' + dueDate.format() + '!';
            return sectionHeader;
        } else {
            sectionHeader.title = 'Form Submission';
            return sectionHeader;
        }
    }
 
    Public List<Account> getAccounts(){
     
        if(enterstring!=null && enterstring!='')
            lstaccount=[select id,name,type,industry from account where name like:enterstring+'%'];
        else
            lstaccount=[select id,name,type,industry from account];
        return lstaccount;
 
    }
    public void search1(){
        getAccounts();
     
    }


 public Component.Apex.PageBlock getpageBlock(){
        Component.Apex.PageBlock pb=new Component.Apex.PageBlock();
        Component.Apex.PageBlockTable  ptable=new Component.Apex.PageBlockTable();
        Component.Apex.OutputLabel optlabel=new Component.Apex.OutputLabel();
        Component.Apex.CommandButton cmdbtn=new Component.Apex.CommandButton();
        cmdbtn.value='Search';
        cmdbtn.expressions.action='{!search1}';
        optlabel.value='Enter Name';
        Component.Apex.Inputtext intext=new Component.Apex.InputText();
        intext.id='searchtext';
        intext.expressions.value='{!enterstring}';
        optlabel.for='intext';
        ptable.expressions.value='{!accounts}';
        ptable.var='a';
        if(enterstring!=null && enterstring!='')
         ptable.rendered=true;
        else
         ptable.rendered=false;
        Component.Apex.Column namecolumn=new Component.Apex.Column();
        namecolumn.expressions.value='{!a.name}';  
        Component.Apex.Column industrycolumn=new Component.Apex.Column();
        industrycolumn.expressions.value='{!a.Industry}';
        Component.Apex.Column typecolumn=new Component.Apex.Column();
        typecolumn.expressions.value='{!a.type}';
        pb.childcomponents.add(optlabel);
        pb.childcomponents.add(intext);
        pb.childcomponents.add(cmdbtn);
        pb.childcomponents.add(ptable);
        ptable.childcomponents.add(namecolumn);
        ptable.childcomponents.add(typecolumn);
        ptable.childcomponents.add(industrycolumn);
        return pb;
    }
}
=====================
Visualforce page
============================

<apex:page standardcontroller="Account" extensions="DynamicComponentExample11">
    <apex:form >
           <apex:dynamicComponent componentValue="{!pageBlock}"/>
    </apex:form>
</apex:page>

=======================
Output:
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