Wrapper class for displaying the selected records

Wrapper class for displaying the selected records in Next page

This scenario mainly describes the usage of Wrapper class. Wrapper class is used to display different types of datatypes in a single table. In the following scenario, we are displaying Boolean and list datatypes.

page1:

<apex:page sidebar="false" controller="WrapTestClass">
<apex:form >
<apex:pageblock >
<apex:pageblocksection >
<apex:pageblocktable value="{!testingrecords}" var="tr">
<apex:column headervalue="Action">
<apex:inputcheckbox value="{!tr.ischecked}"/>
</apex:column>
<apex:column headerValue="Name">
{!tr.TName}
</apex:column>
<apex:column headerValue="City">
{!tr.TCity}
</apex:column>
</apex:pageblocktable>
</apex:pageblocksection>
</apex:pageblock>
<apex:commandButton value="SELECT" action="{!selRecDisplay}"/>
</apex:form>
</apex:page>

class1:

public with sharing class WrapTestClass {
	List<string> lstselectedNames = new List<string>();
	public PageReference selRecDisplay() {
		for(wrapper w: lstwrap){
			if(w.ischecked==true){
				lstselectedNames.add(w.Tname);
			}
		}
		List<Testing__c> lstselectedrecords = [select Id,name,city__c from Testing__c where name in : lstselectedNames];
		List<String> lstselectedRecordIds = new List<String>();
		for(Integer i=0;i<lstselectedrecords.size();i++){
			lstselectedRecordIds.add(lstselectedrecords[i].Id);
		}
		string s='';
		for(Integer i=0;i<lstselectedRecordIds.size();i++) {
			if(i<lstselectedRecordIds.size()-1)
			s=s+lstselectedRecordIds[i]+':';
			else
			s=s+lstselectedRecordIds[i];
		}
		pagereference ref = new pagereference('/apex/t123?value='+s);
		ref.setredirect(true);
		return ref;
	}

	List<wrapper> lstwrap = new List<wrapper>();
	List<Testing__c> lsttest = new List<Testing__c>();
	public List<wrapper> getTestingrecords() {
		lsttest = [select Id,name,city__c from Testing__c];
		for(Integer i=0;i<lsttest.size();i++) {
			lstwrap.add(new wrapper(lsttest[i].name,lsttest[i].city__c));
		}
		return lstwrap;
	}
	public class wrapper{
		public String Tname{get;set;}
		public String Tcity{get;set;}
		public boolean ischecked{get;set;}
		public wrapper(String Tname,String Tcity) {
			this.Tname=Tname;
			this.Tcity=Tcity;
			this.ischecked=false;
		}
	}
}

page2:

<apex:page controller="DClass">
<apex:form >
<apex:pageBlock >
<apex:pageBlockSection >
<apex:pageBlockTable value="{!records}" var="r">
<apex:column headerValue="Name">
{!r.Name}
</apex:column>
<apex:column headerValue="City">
{!r.City__c}
</apex:column>
</apex:pageBlockTable>
</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>

class2:

public with sharing class DClass {
	List<Testing__c> lsttest = new List<Testing__c>();
	public List<Testing__c> getRecords() {
		List<String> ids = url.split(':');
		lsttest = [select Id,name,city__c from Testing__c where id in : ids];
		return lsttest;
	}
	String url = apexpages.currentpage().getparameters().get('value');
}