Insert,Edit,Delete,Clone Records for an object from Vfpage

Hi Friends,
  
I hope below post is very helpful for the learners and help them to understand the basic CRUD operations from VF page.

In the below example, I explained Insert / Edit/Delete /Clone operations on Account object.

Here are the code snippets for VF Page and Controllers.

Vfpage:-
Name :- DML Vfpage
<apex:page Controller="editdeleteCOn" >
<apex:form >
 <apex:sectionHeader title="Edit/Delete" subtitle="Auditing Accounts"/>
 <div align='right'>
 <apex:commandButton value="Insert New" action="{!insertNew}" style="width:150px"/>
  </div>
  <br/>
  <apex:pageBlock >
   <apex:pageBlockTable value="{!lstacc}" var="acc">
     <apex:column >
     {!acc.name}
     <apex:param name="aid" value="{!acc.id}" />
     </apex:column>
     <apex:column value="{!acc.Website}" />
     <apex:column value="{!acc.phone}" />
     <apex:column headerValue="Action" >
      <apex:commandLink value="Edit" action="{!editCon}">
      <apex:param name="cid" value="{!acc.id}" assignTo="{!ecid}"/>
      </apex:commandlink>
      &nbsp;&nbsp;/&nbsp;&nbsp;
      <apex:commandLink value="Delete" action="{!deleteCon}">
      <apex:param name="cid" value="{!acc.id}" assignTo="{!dcid}"/>
      </apex:commandLink>
      &nbsp;&nbsp;/&nbsp;&nbsp;
      <apex:commandLink value="Clone" action="{!cloneCon}">
      <apex:param name="cid" value="{!acc.id}" assignTo="{!ccid}"/>
      </apex:commandLink>
     </apex:column>
   </apex:pageBlockTable>
   <apex:detail subject="{!$CurrentPage.parameters.aid}"/>
  </apex:pageBlock>
  </apex:form>
</apex:page>
Controller:-
public class editdeleteCOn {
 //global declarations
   public String ecid{get;set;} // commandlink edit property
   public String dcid{get;set;} // commandlink delete property
   public String ccid{get;set;} // commandlink clone property
   list<Account> lstacc = new list<Account>();
   list<Account> lstacc1 = new list<Account>();
   // Displaying accounts on vfpage
    public list<Account> getlstacc () {
      lstacc =[select Name,phone,website from Account];
      return lstacc;
    }
    // To redirect to editpage.
     public PageReference editCon() {
       pagereference ref = new pagereference('/apex/dataedit?id='+ecid);
       ref.setRedirect(False);
       return ref;  
    }
    // to delete the selected record
       public pagereference deleteCon() {
        lstacc1 =[Select id,Name from Account where id=:dcid];
        delete lstacc1;
        pagereference ref = new pagereference('/apex/editdelete');
        ref.setredirect(True);
        return ref;  
    }
     // to redirect to insert page.
    public PageReference insertNew() {
    pagereference ref = new pagereference('/apex/accountinsert');
    ref.setRedirect(True);
    return ref;
    }
    // for cloning the records.
    public PageReference cloneCon() {
    account c =  [Select id,Name From account where id =:ccid];
    account cloneaccount = c.clone(false);
    insert cloneaccount;
    pagereference ref = new pagereference('/apex/editdelete');
    ref.setRedirect(True);
    return ref;
    }
}

When you click on Edit link i am redirecting to another vfpage.
Vfpage : dataedit
<apex:page standardController="Account" extensions="savecon">
<apex:form >
  <apex:sectionHeader title="Editing Demo" subtitle="Edit"/>
   <apex:pageBlock tabStyle="Account" >
   <apex:pageBlockButtons location="Bottom">
   <apex:commandButton action="{!save}" value="Save"/>
   </apex:pageBlockButtons>
        <apex:pageBlockSection >
          <apex:inputField value="{!account.Name}"/>
          <apex:inputField value="{!account.Website}"/>
          <apex:inputField value="{!account.phone}"/>
        </apex:pageBlockSection>
   </apex:pageBlock>
</apex:form>
</apex:page>
Controller:savecon
public with sharing class savecon {
    ApexPages.StandardController con;
    public savecon(ApexPages.StandardController controller)
       con=controller;
    }
    public pagereference save()
    {
        con.save();
        return new pagereference(page.editdelete.getUrl());
    }
}
When you click on insert ,i am displaying another page to insert records from there,
Vfpage: accountinsert
<apex:page standardController="Account"  extensions="accountinsertcon">
<apex:form >
  <apex:sectionHeader title="Inserting New" subtitle="Account"/>
   <apex:pageBlock >
      <apex:pageBlockButtons >
      <apex:commandButton value="Save" action="{!save}"/>
      </apex:pageBlockButtons>
      <apex:pageBlockSection >
     <apex:inputField value="{!account.Name}"/>
     <apex:inputField value="{!account.Phone}"/>
     <apex:inputField value="{!account.Website}"/>
     <apex:inputField value="{!account.AnnualRevenue}"/>
     </apex:pageBlockSection>
   </apex:pageBlock>
</apex:form>
</apex:page>
Controller :accountinsertCon
public class accountInsertCOn {
    ApexPages.StandardController con;
    public accountInsertCOn(ApexPages.StandardController controller) {
    con=controller;
    }
    public pagereference save()
    {
       con.save();
       pagereference ref = new pagereference('/apex/editdelete');
       ref.setRedirect(TRUE);
       return ref;
    }
}
Thank You! I hope This will be useful for one our friends.