Salesforce Crud operation

 visual force page 

<apex:page controller="IMScitycrudoperation">

    

     <apex:form>

        <!-- Insert Section -->

        <apex:pageBlock title="Insert Record">

            <apex:inputText value="{!newRecord.Name}" />

            <apex:commandButton value="Insert" action="{!insertRecord}" rerender="recordsTable" />

        </apex:pageBlock>

        

        <!-- Update Section -->

        <apex:pageBlock title="Update Record">

            <apex:pageBlockTable value="{!customObjectRecords}" var="record">

                <apex:column headerValue="Name">

                    <apex:inputText value="{!record.Name}" />

                </apex:column>

                <apex:column headerValue="Action">

                    <apex:commandButton value="Update" action="{!updateRecord}" rerender="recordsTable">

                        <apex:param name="recordId" value="{!record.Id}" assignTo="{!recordIdToUpdate}" />

                    </apex:commandButton>

                </apex:column>

            </apex:pageBlockTable>

        </apex:pageBlock>

        <!-- Delete Section -->

        <apex:pageBlock title="Delete Record">

            <apex:pageBlockTable value="{!customObjectRecords}" var="record">

                <apex:column headerValue="Name">

                    {!record.Name}

                </apex:column>

                <apex:column headerValue="Action">

                    <apex:commandButton value="Delete" action="{!deleteRecord}" rerender="recordsTable">

                        <apex:param name="recordId" value="{!record.Id}" assignTo="{!recordIdToDelete}" />

                    </apex:commandButton>

                </apex:column>

            </apex:pageBlockTable>

        </apex:pageBlock>

    </apex:form>

</apex:page>

Apex class 

public class IMScitycrudoperation {

public City__c newRecord { get; set; }

    public List<City__c> customObjectRecords { get; set; }

    public Id recordIdToUpdate { get; set; }

    public Id recordIdToDelete { get; set; }

    public IMScitycrudoperation() {

        newRecord = new City__c();

        customObjectRecords = [SELECT Id, Name FROM City__c];

    }

    public PageReference insertRecord() {

        insert newRecord;

        newRecord = new City__c(); // Clear the input fields after insert

        return null; // You can navigate to a different page if needed.

    }

    public PageReference updateRecord() {

        City__c recordToUpdate = [SELECT Id, Name FROM City__c WHERE Id = :recordIdToUpdate];

        update recordToUpdate;

        return null; // You can navigate to a different page if needed.

    }

    public PageReference deleteRecord() {

        City__c recordToDelete = [SELECT Id FROM City__c WHERE Id = :recordIdToDelete];

        delete recordToDelete;

        return null; // You can navigate to a different page if needed.

    }

}