How Can Show Loading on Page_Load

My Englist is Bad!

Under is the translation:
I thought increase GridView time demonstrates "Loading"
How do I want to do?

hello.

are you talking about doing this with atlas?

yes ,can you help me?

How can I UpdatePanel.Update() during processing

Follow the code test.I'm trying to show each line per time... but this 5 lines were showed after the proc ended

How can I do this ?

For iAsInteger = 1To 5
Dim drAs DataRow = Session("dt").Rows.Add
dr("DLLFilename") =CStr(i * 1)
dr("DLLDatetime") =CStr(i * 2)
dr("PackageName") =CStr(i * 3)
dr("PackageID") =CStr(i * 4)
dr("DLLFolder") =CStr(i * 5)
dr("MSIFolder") =CStr(i * 6)

GridView1.DataSource =New DataView(Session("dt"))
GridView1.DataBind()
UpdatePanel1.Update()

System.Threading.Thread.Sleep(1000)
Next

The data is only sent to the browser when the server method completes. Calling Update() only flags the updatepanel to be updated when the server processing is complete.

How can i stop my client side list view from disappearing every time i poll a web service?

I've written a page that displays some live information that is provided by a web service and then bound to a client side list view (the binding follows this example:http://atlas.asp.net/docs/Walkthroughs/GetStarted/databind.aspx). This page is updated with a client side timer that ticks every 3 seconds. The idea is that the page updates seamlessly as the web service is polled every few seconds.

This almost works, but there seems to be a delay whilst the web service is fetching the information, during which no list view is rendered. This means that every 3 seconds the table disappears momentarily, and then the new information is shown correctly. This leads to the screen looking "flickery".

My question is how can i prevent this flickering from appearing whilst the data is retrieved from the web service?

Many thanks

-Matt

Bonus Information:

Here are some code examples to make this a bit clearer. This is the code that updates the page and retrives the information from the webservice:

function PageRefreshTick() { LotItemDataService.GetInProgressLots(inProgressCallComplete); }function inProgressCallComplete(result) { document.getElementById("InProgressLotsItemListView").control.set_data(result); }

And here are the relevant parts of the markup:

<asp:Content ID="Content2" ContentPlaceHolderID="Zone1Content" runat="server"> <timer id="PageRefreshTimer" interval="3000" enabled="true" tick="PageRefreshTick" /> <atlas:ScriptManagerProxy id="ScriptManagerProxy" runat="server"> <services> <atlas:ServiceReference Path="LotItemDataService.asmx" /> </services> </atlas:ScriptManagerProxy><div class="ListView"> <div id="InProgressLotsItemListView"> </div> <div style="display: none;"> <div id="InProgressLotsItemListView_layoutTemplate"> <div id="InProgressLotsItemListView_layoutTemplate_templateItem"> <table border="0"> <tbody id="InProgressLotsItemListView_layoutTemplate_LotItemParent"> <tr id="InProgressLotItem" style="height: 28px; width: 599px;"> <td style="height: 28px;"> <table cellpadding="0" cellspacing="0"> <tr> <td style="width: 16px;"> <img id="InProgressIsTracked" alt="Tracked" src="../App_Themes/BCADirect/images/icons/icontracker.gif" /> </td> <td style="width: 40px;"> <a id="InProgressLotId" class="BidSessionLink"></a> </td> <td style="width: 10px;">   </td> <td style="width: 40px;"> <img id="VehicleImage" alt="VehicleImage" /> </td> <td style="width: 10px">   </td> <td style="width: 250px;"> <table> <tr> <td> <a id="InProgressCompleteDescription" class="BidSessionLink" /> </td> </tr> <tr> <td> <label id="InProgressRegistration" class="BidSessionLabel" /> </td> </tr> </table> </td> <td style="width: 10px;"> </td> <td style="width: 300px;"> <table> <tr> <td> <label id="InProgressHighestBidder" class="BidSessionLabel" /> </td> </tr> <tr> <td> <label class="BidSessionLabel">Current price: </label> <label id="InProgressCurrentPrice" class="BidSessionLabel" /> </td> </tr> </table> </td> <td style="width: 10px;">   </td> <td> <label class="BidSessionLabel" id="PlaceBidLabel">Test</label> </td> <td style="width: 100px; height: 100px;"> <label id="InProgressTimeRemaining" class="BidSessionLabel" /> </td> </tr> </table> </td> </tr> </tbody> </table> <a id="InProgress_layoutTemplate_HyperLink1" href="http://www.google.com" class="BidSessionLink"> </a> </div> </div> </div></div> <listView id="InProgressLotsItemListView" itemTemplateParentElementId="InProgressLotsItemListView_layoutTemplate_LotItemParent"> <layoutTemplate> <template layoutElement="InProgressLotsItemListView_layoutTemplate" /> </layoutTemplate> <bindings> <binding dataContext="waitingLotsItemDataSource" dataPath="data" property="data" /> </bindings> <itemTemplate> <template layoutElement="InProgressLotItem"> <image id="InProgressIsTracked"> <bindings dataPath="IsTracked" property="visible" /> </image> <hyperLink id="InProgressLotId"> <bindings> <binding dataPath="Id" property="text" /> <binding dataPath="VehicleDetailsUrl" property="navigateURL" /> </bindings> </hyperLink> <hyperLink id="InProgressCompleteDescription"> <bindings> <binding dataPath="CompleteDescription" property="text" /> <binding dataPath="VehicleDetailsUrl" property="navigateURL" /> </bindings> </hyperLink> <label id="InProgressRegistration"> <bindings> <binding dataPath="Registration" property="text" /> </bindings> </label> <label id="InProgressTimeRemaining"> <bindings> <binding dataPath="TimeRemaining" property="text" /> </bindings> </label> <label id="InProgressHighestBidder"> <bindings> <binding dataPath="HighestBidUserName" property="text" /> </bindings> </label> <label id="InProgressCurrentPrice"> <bindings> <binding dataPath="CurrentPrice" property="text" /> </bindings> </label> <label id="PlaceBidLabel"> <bindings> <binding dataPath="BidNowText" property="text" /> </bindings> </label> </template> </itemTemplate> </listView></asp:Content>

Although i didn't receive any replies through this board, I received a number of emails from my companies .net community, including this one:

The problem with the list view is a known issue with the Atlas team (not that they seem to be actively trying to fix it). I am currently working n a custom list view to try and reduce the flickering.

So there are couple of options open that you could try :-

1.Buffer your data and only redraw the list view when there is a delta in your data reducing the flicker.

2.Use the XML script data binding but draw the list view manually using atlas client side JavaScript (Here at HMV I manually create the list view using divs or a table due to the flickering issues).

3.If you are not bound to a Atlas then try http://www.telerik.com/ who has some awesome ajaxable controls that you can use.

I tried rendering the output myself with JavaScript to the innerHTML of a div tag, and this indeed fixed the problem. However this in turn introduces its own set of problems further down the line as I wanted to use animations, and using this method I have no components in the xml portion of the markup.

I guess until the underlying listview big is fixed, there is no way to move forward with this?

-Matt