Cases
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"); --Increase when you need to transfer parameters 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 Oh, the people according to their own needs to operate '; |
If you let this div automatically refresh, you can use SetInterval (' Startrefresh () ', 5000), which is the function of automatically performing a Startrefresh method every 5 seconds, and another way is to settimeout (' Startrefresh () ', 5000), but this method is only executed once.
The above will automatically refresh, let's introduce the use of 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 part of the data to be updated, such as a repeater, including a paging control; </ContentTemplate> </asp:UpdatePanel> The background needs to register the page as Ajax AjaxPro.Utility.RegisterTypeForAjax (typeof) (the last Word of the page to be registered inherits, such as: The page is: customerlist.aspx, then this is customerlist)); Registers an asynchronous control, Lnkbtnrefreshlinkman 10 LinkButton, for invoking the background data Update method; This.smScriptManager.RegisterAsyncPostBackControl (Lnkbtnrefreshlinkman); Registers the paging control This.smScriptManager.RegisterAsyncPostBackControl (this. Pager); <summary> Refresh Contact List </summary> <param name= "Sender" ></param> <param name= "E" ></param> public void Refreshlinkmanlist (object sender, EventArgs e) { To update the data contained in the AJAX control, the UpdateMode of the AJAX control must be specified as conditional Uplinkmanlist.update (); } The LinkButton onclick event is invoked in the foreground script method, remember to import the jquery script file reference First OH $ ("#<%=lnkbtnrefreshlinkman.clientid%>"). Click (); |