Specifies the implementation code of the div content on the ajax partial refresh page

Here we will introduce the regular assignment of values to the specified div. We can use the setInterval or setTimeOut Function to execute the ajax function, so that we can refresh the function in a few seconds, let's look at the instance.

Example

The Code is as follows:

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<Script type = "text/javascript"> Var xmlhttp; Function startrefresh (){ Xmlhttp = new XMLHttpRequest (); Xmlhttp. open ("POST," ss. php ", true ); Xmlhttp. setRequestHeader ("Content-type", "application/x-www-form-urlencoded "); // Xmlhttp. send ("name = wk"); -- added when parameters need to be transmitted Xmlhttp. onreadystatechange = function (){ If (xmlhttp. readyState = 4) If (xmlhttp. status = 200) Document. getElementById ("mydvi"). innerHTML = xmlhttp. responseText; } } </Script>

Ss. php code

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<? Echo 'here is the data returned by ajax. You can operate it as needed ';

If you want this div to be automatically refreshed, you can use setInterval ('startrefresh () ', 5000) to automatically execute the startrefresh method every five seconds, another method is setTimeout ('startrefresh () ', 5000), but this method will only be executed once.

The above will automatically refresh without stopping. Next we will introduce how to use ajax to save data.

The Code is as follows:

The Code is as follows:

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<Asp: ScriptManager ID = "smScriptManager" runat = "server"> </Asp: ScriptManager> <Asp: UpdatePanel ID = "upLinkmanList" UpdateMode = "Conditional" runat = "server"> <ContentTemplate> // The data part to be updated, such as a Repeater, including the paging control; </ContentTemplate> </Asp: UpdatePanel> // Register the page as Ajax in the background AjaxPro. Utility. RegisterTypeForAjax (typeof (the last word of the Inherits page to be registered, for example, CustomerList. aspx, CustomerList )); // Register the asynchronous control, which contains ten linkbuttons (lnkbtnRefreshLinkman) to call the data update method in the background; This. smScriptManager. RegisterAsyncPostBackControl (lnkbtnRefreshLinkman ); // Register the paging control this. smScriptManager. RegisterAsyncPostBackControl (this. Pager );   /// <Summary> /// Refresh the contact list /// </Summary> /// <Param name = "sender"> </param> /// <Param name = "e"> </param> Public void RefreshLinkmanList (object sender, EventArgs e) { // Update the data contained in the Ajax control. The UpdateMode of the Ajax control must be specified as Conditional. UpLinkmanList. Update (); } // Call the Linkbutton onclick event in the foreground script method. Remember to import the reference of the Jquery script file first. $ ("# <% = LnkbtnRefreshLinkman. ClientID %>"). click ();