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Add and remove list items from ListView in ASP.NET Core ListView control

26 Oct 2021 / 1 minute to read

You can add or remove list items from the ListView component using the addItem and removeItem methods. Refer to the following steps to add or remove a list item.

  • Render the ListView with data source, and use the template property to append the delete icon for each list item. Also, bind the click event for the delete icon using the actionComplete handler.
  • Render the Add Item button, and bind the click event. On the click event handler, pass data with random id to the addItem method to add a new list item on clicking the Add Item button.
  • Bind the click handler to the delete icon created in step 1. Within the click event, remove the list item by passing the delete icon list item to removeItem method.
tagHelper
list.cs
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@using Syncfusion.EJ2
@using Syncfusion.EJ2.Lists;

<ejs-listview id="sample-list-flat" dataSource="(IEnumerable<object>)ViewBag.dataSource" actionComplete="onComplete">
    <e-listview-fieldsettings iconCss="icon" text="text"></e-listview-fieldsettings>
</ejs-listview>

<ejs-button id="btn"><e-content-template>Add Item</e-content-template></ejs-button>

<style>
    #sample-list-flat {
        margin: 40px auto;
        max-width: 350px;
    }

    #btn {
        margin: 40px auto;
        display: block;
    }
    /* csslint ignore:start */

    @@font-face {
        font-family: "e-icon";
        src: url(data:application/x-font-ttf;charset=utf-8;base64,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) format("truetype");
        font-weight: normal;
        font-style: normal;
    }

    /* csslint ignore:end */

    #sample-list-flat .delete-icon::after {
        font-family: "e-icon";
        content: "\e700";
        float: right;
        cursor: pointer;
    }
</style>
<script>
    //Event handler to add the list item on button click
    document.getElementById("btn").onclick = () => {
        var listviewInstance = document.getElementById("sample-list-flat").ej2_instances[0];
        var data = {
            text: "Koenigsegg - " + (Math.random() * 1000).toFixed(0),
            id: (Math.random() * 1000).toFixed(0).toString(),
            icon: "delete-icon"
        };
        listviewInstance.addItem([data]);
        setTimeout(() => {
            var newEle = document.querySelectorAll('[data-uid="' + data.id + '"]');
            newEle[0].addEventListener("click", deleteItem.bind(this));
        }, 100);
    };

    //Method for actionComplete handler
    function onComplete() {
        var iconEle = document.getElementsByClassName("delete-icon");
        //Event handler to bind the click event for delete icon
        Array.prototype.forEach.call(iconEle, (element) => {
            element.addEventListener("click", deleteItem.bind(this));
        });
    }

    //Method to delete the list item
    function deleteItem(args) {
        var listviewInstance = document.getElementById("sample-list-flat").ej2_instances[0];
        args.stopPropagation();
        var liItem = (args.target).parentElement.parentElement;
        listviewInstance.removeItem(liItem);
        onComplete();
    }
</script>
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace WebApplication1.Controllers
{
    public class ListViewController : Controller
    {
        public IActionResult list()
        {   
            List<object> listdata = new List<object>();
            listdata.Add(new { text= "Hennessey Venom", id= "1", icon= "delete-icon" });
            listdata.Add(new { text= "Bugatti Chiron", id= "2", icon= "delete-icon" });
            listdata.Add(new { text= "Bugatti Veyron Super Sport", id= "3", icon= "delete-icon" });
            listdata.Add(new { text= "Aston Martin One- 77", id= "4", icon= "delete-icon" });
            listdata.Add(new { text= "Jaguar XJ220", id= "list-5", icon= "delete-icon" });
            listdata.Add(new { text= "McLaren P1", id= "6", icon= "delete-icon" });
            ViewBag.dataSource = listdata;
            return View();
        }       
    }
}
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