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POUsing Ajax (may be with web services) for this chat application
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  1. POUsing Ajax (may be with web services) for this chat application
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    copied!<p>I want to use Ajax for my chat application instead of refreshing an Iframe every second for new messages. Someone told me to use webservices with ajax. What should I do with my code to use Ajax?</p> <p>Here is the code which shows Iframe which is called every second and Iframe src has an aspx page which displays chat messages</p> <pre><code>&lt;script type="text/javascript"&gt; function refreshConversatio() { document.getElementById('iframeDisplayMessage').src = 'frmMessageDisplay.aspx'; } &lt;/script&gt; &lt;body&gt; &lt;div id="divMessageDisplayPage" style="height: 724px; "&gt; &lt;asp:PlaceHolder ID="ContentPlaceHolderDisplayMessage" runat="server"&gt; &lt;iframe id="iframeDisplayMessage" name="iframeDisplayMessage" width="76%" style="background-color:White;" height="95%" frameborder="0" src="frmMessageDisplay.aspx" onload="document.getElementById('iframeDisplayMessage').contentWindow.scrollTo(0,document.getElementById('iframeDisplayMessage').contentWindow.document.body.scrollHeight)"&gt; &lt;/iframe&gt; &lt;/asp:PlaceHolder&gt; &lt;/div&gt; &lt;script type="text/javascript"&gt; setInterval(function () { refreshConversatio(); }, 1000) &lt;/script&gt; &lt;/body&gt; </code></pre> <p>This is the Aspx page which is called in Iframe and it has literal which displays messages</p> <pre><code>&lt;div id="divConversation" style="width: 100%;"&gt; &lt;asp:Literal ID="RecepientConversation" runat="server"/&gt; &lt;/div&gt; </code></pre> <p>And this is Ajax code Which has not been used and I don't Know where and How to use it in my above application</p> <pre><code>&lt;!DOCTYPE HTML&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head&gt; &lt;!-- Reference to google J-Query api. You can download and add jquery javasripts files to you soln.--&gt; &lt;script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"&gt;&lt;/script&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;script type="text/javascript"&gt; function callService() { //url of your web service $.ajax('May be url of web service to be written here', { beforeSend: function (xhr) { }, complete: function () { }, contentType: 'application/json; charset=utf-8', dataType: 'json', jsonp: 'callback', type: 'POST', error: function (xhr, ajaxOptions, thrownError) { //Function will be called when any error occcured. alet(thrownError); }, success: function (data) { if (!data.d) { //Cound not find data. } else { if (curdata != data.d) { //result of you web method is stored in data.d object. //TODO : Work with you data here. alert(data.d); } } } }); } callService(); &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>After postback</p> <pre><code> if (!Page.IsPostBack) { } if(dt.Rows.Count != 0) { showOnPage.Append("&lt;div style='background-color:ALICEBLUE;float:left; width:100%; word-wrap: break-word;font-size:14px;'&gt;&lt;pre&gt;&lt;font color='green'&gt;&lt;b&gt;&lt;div style='background-color:ALICEBLUE; margin-right:410px;'&gt;" + dt.Rows[i][2].ToString() + " Says: &lt;/b&gt;&lt;/font&gt;&lt;/pre&gt;&lt;/div&gt;&lt;div style='background-color:ALICEBLUE;font-size:14px;float: left;width: 410px;margin-left: -410px; word-wrap: break-word;font-size:14px;'&gt;&lt;pre&gt;&lt;font&gt;" + dt.Rows[i][0].ToString() + "&lt;/font&gt;&lt;/pre&gt;&lt;/div&gt;&lt;div style='background-color:ALICEBLUE; word-wrap: break-word;'&gt;&lt;p style='color:#8B8A8A; margin-top:0'&gt;Sent at " + Convert.ToDateTime(dt.Rows[i][1]).ToLongTimeString() + "&lt;/p&gt;&lt;/div&gt;&lt;div style='clear:both;'&gt;&lt;/div&gt;"); } RecepientConversation.Text=showOnPage.ToString(); </code></pre>
 

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