How to scroll the Grid Scroller programmatically in ASP.NET Web Forms?

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This Knowledge base explains how to scroll the ASP.NET Web Forms Grid scroller programmatically.

Solution:

We can achieve this by using getScrollObject method of ejGrid and scrollY method of ejScroller. The getScrollObject method returns the instance of the scroller object.

In scrollY method we need to pass the integer value to move the scroller. In the below given solution we have moved the grid scroller to the end of the Grid based on the length of the current view data and row height.

1.Render the Grid control.

HTML

<input type="button" value="MoveScroller" onclick="moveScroller()" />
<div id="Grid"></div>

JavaScript

<script> 
     $(function () {
        $("#Grid").ejGrid({
// the datasource "window.gridData" is referred from 'http://js.syncfusion.com/demos/web/scripts/jsondata.min.js'
            dataSource: window.gridData,
            allowPaging: true,
            allowScrolling: true,
       scrollSettings: {height:300, width:600},
            columns: [
                                        { field: "OrderID", headerText: "Order ID", width: 75 },
                                        { field: "CustomerID", headerText: "Customer ID", width: 75 },
                                        { field: "EmployeeID", headerText: "Employee ID", width: 75 },
                                        { field: "ShipCity", headerText: "ShipCity", width: 110 }
            ]
        });
    });
</script>

MVC

<input type="button" value="MoveScroller" onclick="moveScroller()" />
 
@(Html.EJ().Grid<object>("Grid")
      .Datasource((IEnumerable<object>)ViewBag.datasource)      
      .AllowPaging()
      .AllowScrolling()
      .ScrollSettings(scroll => {scroll.Height(300).Width(600); } )   
      .Columns(col =>
      {
          col.Field("OrderID").HeaderText("Order ID").Width(75).Add();
          col.Field("CustomerID").HeaderText("Customer ID").Width(75).Add();
          col.Field("EmployeeID").HeaderText("Employee ID").Width(75).Add();
          col.Field("ShipCity").HeaderText("ShipCity").Width(110).Add();
      }))

using EJGrid.Models;
using System.Linq;
using System.Web.Mvc;
using System.Web.UI.WebControls;
using Syncfusion.Linq;
 
namespace EJGrid.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.datasource = OrderRepository.GetAllRecords().ToList();          
            return View();
        }
    }
}

ASPX

<input type="button" value="MoveScroller" onclick="moveScroller()" />
 
<ej:Grid runat="server" ID="FlatGrid" AllowPaging="true" AllowScrolling="true" >
        <ScrollSettings Height="300" Width="600" />
        <Columns>
            <ej:Column Field="OrderID" HeaderText="Order ID" Width="75"  />
            <ej:Column Field="CustomerID" HeaderText="Customer ID" Width="75"  />
            <ej:Column Field="EmployeeID" HeaderText="Employee ID" Width="75"   />
            <ej:Column Field="ShipCity" HeaderText="ShipCity" Width="110"   />
        </Columns>
    </ej:Grid>

using System;
using System.Linq;
using System.Web.UI;
using Syncfusion.Linq;
 
namespace WebApplication21
{
    public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            this.FlatGrid.DataSource = OrderRepository.GetAllRecords().ToList();
            this.FlatGrid.DataBind();  
        }
    }
}

ASP.NET CORE

<input type="button" value="MoveScroller" onclick="moveScroller()" />
 
<ej-grid id="FlatGrid"  datasource="ViewBag.datasource" allow-paging="true" allow-scrolling=true >
    <e-scroll-settings height="300" width="600"></e-scroll-settings>
    <e-columns>
        <e-column field="OrderID" header-text="Order ID" width="75" ></e-column>
        <e-column field="CustomerID" header-text="Customer ID" width="75"></e-column>
        <e-column field="EmployeeID" header-text="Employee ID" width="75"></e-column>
        <e-column field="ShipCity" header-text="ShipCity" width="110"></e-column>
    </e-columns>
</ej-grid>

using System.Linq;
using Microsoft.AspNetCore.Mvc;
using WebApplication1.Models;
 
namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        private NORTHWNDContext _context;
        public HomeController(NORTHWNDContext context)
        {
            _context = context;
        }
        public IActionResult Index()
        {      
            ViewBag.datasource = _context.Orders.ToList();
            return View();
        }
    }
}

Angular

HTML

<input type="button" ej-button id="button" value="MoveScroller" (ejclick)="moveScroller($event)" />
 
<ej-grid id="Grid" [dataSource]="gridData" [allowScrolling]="true" [scrollSettings]="scrollSettings >
        <e-columns>
            <e-column field="OrderID"  headerText="Order ID" width="75" ></e-column>
            <e-column field="CustomerID" headerText="Customer ID" width="75"></e-column>
            <e-column field="EmployeeID" headerText="Employee ID" width="75" ></e-column>
            <e-column field="ShipCity" headerText="ShipCity" width="110"></e-column>
        </e-columns>
    </ej-grid>

 
export class GridComponent {
    public gridData;
    public scrollSettings;
    @ViewChild('Grid') Grid: EJComponents<any, any>;
    constructor()
    {
// the datasource "window.gridData" is referred from 'http://js.syncfusion.com/demos/web/scripts/jsondata.min.js'
        this.gridData = window.gridData;
        this.scrollSettings = { width: 600, height: 300 };
    }
 
    moveScroller (e: any){
        var grid = $("#Grid").data("ejGrid"); 
        grid.getScrollObject().scrollY(grid.getRowHeight() * grid.model.currentViewData.length); 
     }
 
}

2. In a button click event we have obtained the instance of grid scroller using getScrollObject method. Then we have moved the scroller to the end of the Grid using scrollY method based on the values of row height and current view data length.

<script>
 
    function moveScroller (args) {
        var grid = $(".e-grid").ejGrid("instance");
     grid.getScrollObject().scrollY(grid.getRowHeight() * grid.model.currentViewData.length)    
}
 
</script>

Result:

Before scrolling in Grid

Figure 1.Before moving the scroller

After scrolling in Grid.

Figure 2.After moving the scroller

Note:

A new version of Essential Studio for ASP.NET is available. Versions prior to the release of Essential Studio 2014, Volume 2 will now be referred to as a classic versions.The new ASP.NET suite is powered by Essential Studio for JavaScript providing client-side rendering of HTML 5-JavaScript controls, offering better performance, and better support for touch interactivity. The new version includes all the features of the old version, so migration is easy.

The Classic controls can be used in existing projects; however, if you are starting a new project, we recommend using the latest version of Essential Studio for ASP.NET. Although Syncfusion will continue to support all Classic Versions, we are happy to assist you in migrating to the newest edition.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls. If you have any queries or require clarifications, please let us know in the comments section below.

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How to scroll the Grid Scroller programmatically in ASP.NET Web Forms?

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