update panel
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im trying to use the update panel but it updates the entire page as supposed to the update panel. i cant find what i have done wrong. can anyone help??? Many thanks in advance ==================================================================================== <%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %> <%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TagPrefix="asp" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <asp:ScriptManager id="ScriptManager1" runat="server"> </asp:ScriptManager> </div> <asp:UpdatePanel id="UpdatePanel1" runat="server"> <contenttemplate> <asp:Label id="Label1" runat="server" Text="panel Created"></asp:Label> </contenttemplate> <triggers> <asp:AsyncPostBackTrigger ControlID="Button1"></asp:AsyncPostBackTrigger> </triggers> </asp:UpdatePanel> <asp:Button ID="Button1" runat="server" Text="Button" /> </form> </body> </html> ===========================code behind================ Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Label1.Text = "Refreshed at " & _ DateTime.Now.ToString() End Sub
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im trying to use the update panel but it updates the entire page as supposed to the update panel. i cant find what i have done wrong. can anyone help??? Many thanks in advance ==================================================================================== <%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %> <%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TagPrefix="asp" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <asp:ScriptManager id="ScriptManager1" runat="server"> </asp:ScriptManager> </div> <asp:UpdatePanel id="UpdatePanel1" runat="server"> <contenttemplate> <asp:Label id="Label1" runat="server" Text="panel Created"></asp:Label> </contenttemplate> <triggers> <asp:AsyncPostBackTrigger ControlID="Button1"></asp:AsyncPostBackTrigger> </triggers> </asp:UpdatePanel> <asp:Button ID="Button1" runat="server" Text="Button" /> </form> </body> </html> ===========================code behind================ Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Label1.Text = "Refreshed at " & _ DateTime.Now.ToString() End Sub
Hi, This is some rather twisted MS logic. The whole idea of the UpdatePanel is to allow only parts of the web form to be posted back in order to provide AJAX functionality. However, the default behaviour of the UpdatePanel is to post the whole page back, rather than just the controls contained within it! To correct this you will need to set the following property against the UpdatePanel:
UpdateMode="Conditional"Hope this helps...Clean code is the key to happiness.
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Hi, This is some rather twisted MS logic. The whole idea of the UpdatePanel is to allow only parts of the web form to be posted back in order to provide AJAX functionality. However, the default behaviour of the UpdatePanel is to post the whole page back, rather than just the controls contained within it! To correct this you will need to set the following property against the UpdatePanel:
UpdateMode="Conditional"Hope this helps...Clean code is the key to happiness.
:( I have set it to conditional however it stll updates the whole page.
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:( I have set it to conditional however it stll updates the whole page.
Having spent a fair bit of time playing around and implementing AJAX solutions, I would recommend that you do not use the UpdatePanel. Even when the UpdatePanel is working as it should, the whole of the page is still posted back, which basically defeats the object of a partial postback. Tell tell signs of this can be seen with drop down lists, that even if outside of the UpdatePanel, will flicker on partial postback. My preferred route for handling AJAX type functionality is through the use of the ScriptManager control's service references. Registreing a local web service through the ScriptManager control creates a JS web service proxy object that is very simple to use. It uses JSON encoding which means the web service response object can be easily accessed to extract the required data, and web service methods can be called as easily as Service.Method(params). You can also set up default success and failure functiojns to handle all web method responses. Check out the following which gives somke examples of how to implement the above: http://www.asp.net/AJAX/Documentation/Live/tutorials/ASPNETAJAXWebServicesTutorials.aspx http://www.semenoff.dk/en/Code-Corner/ASP.Net.AJAX/WebService-From-JavaScript.aspx
Clean code is the key to happiness.