How to open excel file from local disk in Spreadsheet, when the file clicked in ejFileExplorer

<div id="fileExplorer"></div>
<div id="SpreadsheetDialog">
    <div style="height: 100%;">
        <div id="SpredsheetViewer"></div>
    </div>
</div>

$("#fileExplorer").ejFileExplorer({
    fileTypes: "*.xls,*.xlsx ",
    layout: "tile",
    path: "D:/Spreadsheet/", //Physical path.
    ajaxAction: "Spreadsheet/FileAccess",
    width: "100%",
    minWidth: "150px",
    isResponsive: true,
    beforeOpen: "onBeforeOpen"
});
 
$("#SpreadsheetDialog").ejDialog({
    width: "80%",
    showOnInit: false
})
 
$("#SpredsheetViewer").ejSpreadsheet()
 
// Triggers before opening the file
function onBeforeOpen(args) {
    var ssDialog = $("#SpreadsheetDialog").data("ejDialog"), ssObj = $("#SpredsheetViewer").data("ejSpreadsheet");
    if (args.itemType == "File" && (/\.(xls|xlsx)$/i).test(args.selectedItems[0].name)) {
        var file = args.model.selectedFolder + args.model.selectedItems[0];
        $.ajax({
            url: "Spreadsheet/Import",
            type: "POST",
            dataType: "json",
            data: { filePath: file },
            success: function (data) {
                ssDialog.option("title", args.model.selectedItems[0]);
                ssDialog.open();
                ssObj.refresh();
                ssObj.loadFromJSON(data); // Load the JSON data to the spreadsheet
            }
        });
        args.cancel = true;
    }
}

using Syncfusion.EJ.Export;
using Syncfusion.JavaScript;
using Syncfusion.JavaScript.Models;
 
// To process the import request.
[AcceptVerbs("Get", "Post")]
public HttpResponseMessage Import()
{
    string filePath = HttpContext.Current.Request.Params["filePath"];
    ImportRequest importRequest = new ImportRequest();
 
    //If the path from local drive.
    Stream fileStream = System.IO.File.Open(filePath, FileMode.Open, System.IO.FileAccess.Read);
    importRequest.FileStream = fileStream;
    var spreadsheetData = Spreadsheet.Open(importRequest);
    fileStream.Close();
    fileStream.Dispose();
    return new HttpResponseMessage() { Content = new StringContent(spreadsheetData, Encoding.UTF8, "text/plain") }; // Returns the Spreadsheet data
}
 
// To read the file in file explorer    
[AcceptVerbs("Get", "Post")]
public object FileAccess(FileExplorerParams args)
{
    FileExplorerOperations operation = new FileExplorerOperations();
    if (args.ActionType == "Read")
        return operation.Read(args.Path, args.ExtensionsAllow);
    else
        return string.Empty;
}

@(Html.EJ().FileExplorer("fileExplorer")
        .FileTypes("*.xls,*.xlsx")
        .Layout(LayoutType.Tile)
        .Path(@Url.Content("D:/Spreadsheet/"))  //Physical path.
        .AjaxAction(@Url.Action("FileAccess"))
        .Width("100%")
        .MinWidth("150px")
        .IsResponsive(true)
        .ClientSideEvents(eve => eve.BeforeOpen("onBeforeOpen"))
    )
 
@{Html.EJ().Dialog("SpreadsheetDialog").ContentTemplate(@<div style="height: 100%;">
    @{Html.EJ().Spreadsheet<object>("SpredsheetViewer").Render();}
</div>).Width("80%").ShowOnInit(false).Render();}
 
<script>
// Triggers before opening the file
    function onBeforeOpen(args) {
        var ssDialog = $("#SpreadsheetDialog").data("ejDialog"), ssObj = $("#SpredsheetViewer").data("ejSpreadsheet");
        if (args.itemType == "File" && (/\.(xls|xlsx)$/i).test(args.model.selectedItems[0])) {
            var file = args.model.selectedFolder + args.model.selectedItems[0];
            $.ajax({
                url: '@Url.Action("Import", "Home")',
                type: "POST",
                dataType: "json",
                data: { filePath: file },
                success: function (data) {
                    ssDialog.option("title", args.model.selectedItems[0]);
                    ssDialog.open();
                    ssObj.refresh();
                    ssObj.loadFromJSON(data); // Load the JSON data to the spreadsheet
                }
            });
            args.cancel = true;
        }
    }
</script>

using Syncfusion.EJ.Export;
using Syncfusion.JavaScript;
using Syncfusion.JavaScript.Models;
 
// To process the import request.
 [AcceptVerbs(HttpVerbs.Post)]
public ActionResult Import(ImportRequest importRequest, string filePath)
{
    //If the path from local drive.
    Stream fileStream = System.IO.File.Open(filePath, FileMode.Open, System.IO.FileAccess.Read);
    importRequest.FileStream = fileStream;
    var spreadsheetData = Spreadsheet.Open(importRequest);
    fileStream.Close();
    fileStream.Dispose();
    return Content(spreadsheetData); // Returns the Spreadsheet data
}
 
// To read the file in file explorer    
public ActionResult FileAccess(FileExplorerParams args)
{
    FileExplorerOperations operation = new FileExplorerOperations();
    if (args.ActionType == "Read")
        return Json(operation.Read(args.Path, args.ExtensionsAllow));
    else
        return Json(string.Empty);
}

<ej:FileExplorer ID="fileExplorer" runat="server" FileTypes="*.xls,*.xlsx" Layout="Tile"
    Path="D:/Spreadsheet/" AjaxAction="SpreadsheetFeatures.aspx/FileAccess" IsResponsive="true"
    Width="100%" MinWidth="150px" ClientSideOnBeforeOpen="onBeforeOpen">    
    <AjaxSettings>
        <Download Url="downloadFile.ashx{0}" />
        <Upload Url="uploadFiles.ashx{0}" />
    </AjaxSettings>
</ej:FileExplorer>
 
<ej:Dialog ID="SpreadsheetDialog" runat="server" Width="80%" ShowOnInit="false">
        <DialogContent>
            <div style="height: 100%;">
                <ej:Spreadsheet ID="SpredsheetViewer" runat="server">
                </ej:Spreadsheet>                               
            </div>
        </DialogContent>
</ej:Dialog>
 
<script type="text/javascript">
// Triggers before opening the file
    function onBeforeOpen(args) {
        var ssDialog = $("#SpreadsheetDialog").data("ejDialog"), ssObj = $("# SpredsheetViewer").data("ejSpreadsheet");
        if (args.itemType == "File" && (/\.(xls|xlsx)$/i).test(args.selectedItems[0].name)) {
            var file = args.model.selectedFolder + args.model.selectedItems[0];
            $.ajax({
                url: 'SpreadsheetHandler.ashx/ProcessRequest',
                type: "GET",
                dataType: "json",
                data: { filePath: file },
                success: function (data) {
                    ssDialog.option("title", args.model.selectedItems[0]);
                    ssDialog.open();
                    ssObj.refresh();
                    ssObj.loadFromJSON(data); // Load the JSON data to the spreadsheet
                }
            });
            args.cancel = true;
        }
    }
</script>

// To read the file in file explorer    
[WebMethod]
public static object FileAccess(string ActionType, string Path, string ExtensionsAllow)
{
    FileExplorerOperations operation = new FileExplorerOperations();
    if (ActionType == "Read")
        return (operation.Read(Path, ExtensionsAllow));
    else
        return string.Empty;
}

using Syncfusion.EJ.Export;
using Syncfusion.JavaScript;
using Syncfusion.JavaScript.Models;
 
// To process the import request.
public void ProcessRequest(HttpContext context)
{
    var filePath = context.Request.QueryString[0];
    ImportRequest importRequest = new ImportRequest();
    Stream fileStream = File.Open(filePath, FileMode.Open, System.IO.FileAccess.Read);
    importRequest.FileStream = fileStream;
    importRequest.File = null;
    string str = Spreadsheet.Open(importRequest);
    fileStream.Close();
    fileStream.Dispose();
    context.Response.Write(str); // Returns the Spreadsheet data
}