how to get a picklist values in apex controller?

Apex:

public class PicklistController{

    public Lead lead{get;set;}

    public List<SelectOption> statusOptions {get;set;}

   

    // Constructor called when page is accessed.

    public PicklistController() {   

        lead = new Lead();       

        statusOptions = new List<SelectOption>();

        // Use DescribeFieldResult object to retrieve status field.

        Schema.DescribeFieldResult statusFieldDescription =  Lead. Status.getDescribe();

        // For each picklist value, create a new select option

        for (Schema.Picklistentry  picklistEntry: statusFieldDescription.getPicklistValues())

{

            statusOptions.add(new SelectOption( pickListEntry.getValue(),pickListEntry.getLabel()));

            // obtain and assign default value

         

        }    

    }

}

VF Page:

<apex:page controller="PicklistController">

    Please selectValue:

    <apex:form >

        <apex:selectList size="1" value="{!led.Status}">

            <apex:selectOptions value="{!statusOptions}"/>

        </apex:selectList>

    </apex:form>  

</apex:page>

Screen Shot:

Difference between SOAP and Restful Webservice?

* REST and SOAP are the two web service frameworks available on the Force.com platform. 

* The SOAP API uses authentication with username and password, and communicates using XML messages. There are different API's to work with the Enterprise, Partner, Bulk, Metadata etc. 

*The REST API uses HTTP to authenticate, it uses a token authentication and can use OATH to authenticate, it communicates using JSON messages. 

*REST API is generally lighter weight than the SOAP API, works well with mobile applications especially.

how to lock a record?

To lock a set of sObject records in Apex, embed the keywords FOR UPDATE after any inline SOQL statement

To display all the fields of sObject using Apex & VF?

<apex:page showHeader="false" Controller="FieldsClass">
        <apex:DataTable value="{!data}" var="d">
             <apex:column headerValue="Field Name">
                 {!d}
             </apex:column>         
         </apex:DataTable>
</apex:page>
*******************************
public class  FieldsClass {

     public map<string,Schema.SObjectField> data {get;set;}
  
     public  FieldsClass (){
         data = Schema.SObjectType.Book__c.fields.getMap();
        }
    }

We have three country buttons, if we click any button that country information should only display?

Apex:

public class coun {

    public Boolean hide = false;

    public Boolean hide1 = false;

    public Boolean hide2 = false;

    

    public void setMhide(Boolean b) {

    this.hide = b;

    }

    

    public Boolean getMhide() {

    return this.hide;

    }//Passing input dynamically through another method

    

    

    public Boolean getM1hide() {

        return this.hide2;

    }

    

    public void setM1hide(Boolean b) {

      this.hide2 = b;  

    }

    

    

    public Boolean getM2hide() {

        return this.hide1;

    }

    

    public void setM2hide(Boolean b) {

        this.hide1 = b;

    }

    

    

    public PageReference india() {
        setMhide(true);
        setM2hide(false);
        setM1hide(false);     
        return null;
    }//displaying only india information and hiding other information

    

     public PageReference us() {

        setM1hide(true);

        setM2hide(false);

        setMhide(false);

        return null;

    }

    

    public PageReference uk() {

        setM2hide(true);

        setM1hide(false);

        setMhide(false);

        return null;

    }   

    

}

Vf Page:

<apex:page controller="coun">

<apex:form >

<apex:commandButton value="India" action="{!india}" reRender="India,Us,Uk"/>

<apex:commandButton value="Us" action="{!us}" reRender="India,Us,Uk"/>

<apex:commandButton value="Uk" action="{!uk}" reRender="India,Us,Uk"/>

<apex:pageBlock >

<apex:outputPanel id="India">
<apex:pageBlockSection title="India" rendered="{!mhide}">
</apex:pageBlockSection>
</apex:outputPanel>

<apex:outputpanel id="Us">

<apex:pageBlockSection title="US" rendered="{!m1hide}">

</apex:pageBlockSection>

</apex:outputpanel>

<apex:outputpanel id="Uk">

<apex:pageBlockSection title="UK" rendered="{!m2hide}">

</apex:pageBlockSection>

</apex:outputpanel>

</apex:pageBlock>

</apex:form>

</apex:page>

Dispaly particular field based on the selection of the particular field?

<apex:page standardController="Book__c">

<apex:form >

    <apex:pageBlock >

        <apex:pageBlockTable id="mytable" value="{!Book__c}" var="item">

  <apex:column headerValue="Delivery">

    <apex:actionRegion >        

      <apex:inputField value="{!item.City__c}">

        <apex:actionSupport event="onchange" reRender="mytable"/>

      </apex:inputField>

    </apex:actionRegion>

  </apex:column>

  <apex:column headerValue="Delivery Type">

    <apex:inputField rendered="{!item.City__c = 'Chennai'}" value="{!item.Chennai__c}"/>

    <apex:inputField value="{!item.Banglore__c}"/>

  </apex:column>

</apex:pageBlockTable>

    </apex:pageBlock>

</apex:form>

</apex:page>

How To retrieve the records of the custom/standard object of the current user?

Solution:

Id aid = Userinfo.getUserId();

account ac = [Select Id, Name from Account Where CreatedById = : aid limit 1];

System.debug(' ---- ' + ac );

or

Id aid = Userinfo.getUserId();

List<Account> ac = [Select Id, Name From Account Where CreatedById = : aid Limit 10000];