Created
July 17, 2013 04:00
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Simple way to do async UI loading in ASP.NET Web Forms with standard controls
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| <%@ Page Language="C#" AutoEventWireup="true" %> | |
| <%@ Import Namespace="System.Threading" %> | |
| <script runat="server"> | |
| protected void Page_Load(object sender, EventArgs e) | |
| { | |
| uint viewIndex = 0; | |
| uint.TryParse(Request.QueryString["view"], out viewIndex); | |
| views.ActiveViewIndex = (int)(viewIndex < views.Views.Count ? viewIndex : 0); | |
| } | |
| public IEnumerable Grid1_GetData() | |
| { | |
| // Fake long DB call, never sleep in ASP.NET :) | |
| Thread.Sleep(TimeSpan.FromSeconds(5)); | |
| return new[] { | |
| new { FirstName = "Damian", LastName="Edwards", Title="Senior Program Manager" }, | |
| new { FirstName = "Levi", LastName="Broderick", Title="Senior SDE" }, | |
| new { FirstName = "Scott", LastName="Hanselman", Title="Principal Program Manager" } | |
| }; | |
| } | |
| public IEnumerable Grid2_GetData() | |
| { | |
| // Fake long DB call, never sleep in ASP.NET :) | |
| Thread.Sleep(TimeSpan.FromSeconds(10)); | |
| return new[] { | |
| new { FirstName = "Scott", LastName="Hunter", Title="Principal Program Manager Lead" }, | |
| new { FirstName = "Eilon", LastName="Lipton", Title="Principal Development Manager" } | |
| }; | |
| } | |
| </script> | |
| <!DOCTYPE html> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head id="Head1" runat="server"> | |
| <title></title> | |
| <style> | |
| body { | |
| font-family: Calibri, Arial, Helvetica, Sans-serif; | |
| } | |
| iframe { | |
| display: none; | |
| border: none; | |
| } | |
| iframe.loaded { | |
| display: block; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <form id="form1" runat="server"> | |
| <div> | |
| <asp:MultiView runat="server" ID="views" ActiveViewIndex="0"> | |
| <asp:View runat="server"> | |
| <%--Initial page load--%> | |
| <h3>Static Content</h3> | |
| <p>I am static content and will load immediately!</p> | |
| <h3>Peons (5s query)</h3> | |
| <div> | |
| <p class="loading">loading peons...</p> | |
| <iframe src=".?view=1"></iframe> | |
| </div> | |
| <h3>Manager Types (10s query)</h3> | |
| <div> | |
| <p class="loading">loading managers...</p> | |
| <iframe src=".?view=2"></iframe> | |
| </div> | |
| <script> | |
| var iframes = document.querySelectorAll("iframe"), | |
| iframe; | |
| for (var i = 0; i < iframes.length; i++) { | |
| iframe = iframes[i]; | |
| iframe.addEventListener("load", (function (f) { | |
| return function () { | |
| f.parentNode.removeChild(f.previousElementSibling); | |
| f.className = "loaded"; | |
| }; | |
| })(iframe), false); | |
| } | |
| </script> | |
| </asp:View> | |
| <asp:View runat="server"> | |
| <%--Grid 1 content--%> | |
| <asp:GridView runat="server" SelectMethod="Grid1_GetData"></asp:GridView> | |
| </asp:View> | |
| <asp:View runat="server"> | |
| <%--Grid 2 content--%> | |
| <asp:GridView runat="server" SelectMethod="Grid2_GetData"></asp:GridView> | |
| </asp:View> | |
| </asp:MultiView> | |
| </div> | |
| </form> | |
| </body> | |
| </html> |
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