How i can delete selected list value on button click in Salesforce?

hello Shaharyar

Please Try below Code,Its for Contact you may use for other Object

*****Controller****

public class deleteContactController
{
public List<wrapContact> listWrapContact {get; set;}
public class wrapContact
{
public Contact con {get; set;}
public Boolean selected {get; set;}
public wrapContact(Contact c)
{
con = c;
selected = false;
}
}

public deleteContactController()
{
listWrapContact = new List<wrapContact>();

list<Contact> con = [select id,lastname, (select id from cases) from Contact];

for(Contact c : con)
{
if(c.cases.size() == 0){
listWrapContact.add(new wrapContact(c));
}

}
}

public void processSelected() {

List<Contact> lstconToDelete = new List<Contact>();
for(wrapContact wcon: listWrapContact)
{
if(wcon.selected == true)
{
lstconToDelete.add(wcon.con);
}
}

if(lstconToDelete.size() > 0 )
{
Delete lstconToDelete;
}

}
}

****Vf Page****

<apex:page Controller = "deleteContactController">
<apex:form >
<apex:pageBlock Title="Contacts">
<apex:commandButton value="Delete Selected" action="{!processSelected}"/>
<apex:pageBlockSection >
<apex:pageBlockTable value="{!listWrapContact}" var="a">
<apex:column >
<apex:inputCheckbox value="{!a.selected}"/>
</apex:column>
<apex:column value="{!a.con.id}"/>
<apex:column value="{!a.con.lastname}"/>
</apex:pageBlockTable>
</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>

We can delete record in two ways

1.     By using custom button

2.     Visualforce page

By using custom button:

Go to account setup->Account -> Buttons, Links, and Actions->New Button or link

Choose display type list view

Behavior type execute java script

Content Source onclick Java script

{!REQUIRESCRIPT("/soap/ajax/10.0/connection.js")}

var isdelete = {!GETRECORDIDS( $ObjectType.Account)};

var deleteRecord= 'Are you sure to delete ' +isdelete.length+ ' Records?';

if(isdelete.length&& (window.confirm(deleteRecord)))

{

sforce.connection.deleteIds(isdelete,function()

{navigateToUrl(window.location.href);

});

}

else if (isdelete.length == 0)

{

alert("Please select Account record to delete");

}

Then go to search layout add button to list view

3.     Visualforce page

To fulfill this requirement you need a wrapper class, main class and visualforce page

Class

public class AccountDelete {

public list<Account> Acclist{get;set;}

public ID currentPageID;

public list<DeleteExample> accWrap {get;set;}

public AccountDelete(ApexPages.StandardController controller) {

accWrap = new list<DeleteExample>();

//Querying the Student records

Acclist = [select id,name,industry from account];

//Iterating through all the records of the student object

for(integer i =0;i<Acclist.size();i++){

//Creating a new Object of InnerClass

DeleteExample conObj = new DeleteExample(false,Acclist[i]);

accWrap.add(conObj);

}

}

//Method to delete the selected records

public pagereference  deletecheckedRecs (){

//Iterating through the list

for(integer i=0;i<accWrap.size();i++){

//Fetching data of the selected records

if(accWrap[i].checkbox == true){

//deleting student records based on lists index

delete accWrap[i].accObj;

}

}

// create visualforce page with name  deleteWrapperExample

pagereference ref = new pagereference('/apex/deleteWrapperExample');

ref.setredirect(true);

return ref;

}

//Inner  Class

public class DeleteExample{

public boolean checkbox{get;set;}

public account accObj{get;set;}

public DeleteExample(boolean checkbox,account acc)

{

checkbox = checkbox;

accObj   = acc;

}

}

}

Visualforce page

<apex:page standardController="Account" extensions="AccountDelete">

<apex:form >

<apex:pageBlock >

<apex:pageBlockTable value="{!accWrap}" var="acc">

<apex:column headerValue="select">

<apex:inputCheckbox value="{!acc.checkbox}"/>

</apex:column>

<apex:column headerValue="id">

<apex:outputField value="{!acc.accObj.id}"/>

</apex:column>

<apex:column headerValue="Name">

<apex:outputField value="{!acc.accObj.name}"/>

</apex:column>

<apex:column headerValue="Industry">

<apex:outputField value="{!acc.accObj.Industry}"/>

</apex:column>

</apex:pageBlockTable>

<apex:pageBlockButtons >

<apex:commandButton value="delete" action="{! deletecheckedRecs}"/>

</apex:pageBlockButtons>

</apex:pageBlock>

</apex:form>

</apex:page>