Adding Core TreeGrid GS sample

Adding Core TreeGrid GS sample

Author: vinoth-Kumar-S

Pages/Error.cshtml

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+@page
+@model ErrorModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to the <strong>Development</strong> environment displays detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>

Pages/Error.cshtml.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using System.Diagnostics;
+
+namespace mycoreproject.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    [IgnoreAntiforgeryToken]
+    public class ErrorModel : PageModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        private readonly ILogger<ErrorModel> _logger;
+
+        public ErrorModel(ILogger<ErrorModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+
+}

Pages/Index.cshtml

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+@page
+@model IndexModel
+@{
+    ViewData["Title"] = "Home page";
+    var taskData = TreeGridData.GetDefaultData();
+}
+
+<ejs-treegrid id="treegrid"
+              dataSource="taskData"
+              childMapping="Children"
+              treeColumnIndex="1"
+              allowPaging=true
+              allowSorting=true
+              allowFiltering=true>
+    <e-treegrid-columns>
+        <e-treegrid-column field="TaskId"
+                           headerText="Task ID"
+                           textalign=Right
+                           width="95"></e-treegrid-column>
+        <e-treegrid-column field="TaskName"
+                           headerText="Task Name"
+                           width="180"></e-treegrid-column>
+        <e-treegrid-column field="StartDate"
+                           headerText="Start Date"
+                           format="yMd"
+                           textAlign="Right"
+                           width="115"></e-treegrid-column>
+        <e-treegrid-column field="EndDate"
+                           format="yMd"
+                           headerText="End Date"
+                           textAlign="Right"
+                           width="115"></e-treegrid-column>
+        <e-treegrid-column field="Duration"
+                           headerText="Duration"
+                           textAlign="Right"
+                           width="100"></e-treegrid-column>
+        <e-treegrid-column field="Progress"
+                           headerText="Progress"
+                           textAlign="Right"
+                           width="105"></e-treegrid-column>
+        <e-treegrid-column field="Priority"
+                           headerText="Priority"
+                           width="100"></e-treegrid-column>
+    </e-treegrid-columns>
+</ejs-treegrid>