Best way to update a web page in VB 2010 using ASP.net 4.0

The use of UpdatePanels, or JQuery will give you that just depends on what you want really.

Samples using UpdatePanel:

    http://msdn.microsoft.com/en-us/library/bb399001.aspx

Thank you for the suggestions.

I have tried to follow the directions in the url provided but am getting some errors.  I should say that the web site I have developed uses MasterPages for controlling the headers, footers, and menus on the various web site pages.

I want to change an image on the Control pages when the user clicks a MasterPage menu option.  Is that possible using Ajax client side controls?

When I add the Ajax ScriptManager and UpdatePanel controls to the Default.aspx form (which is a Content page under the MasterPage), I get an error saying that the Label and Button controls are not know elements.  Can Ajax controls be used on a Content page and run by clicking on one of the MasterPage menu options?  I am guessing that is not possible, nor does it make sense now that I am typing this out.

<%@ Page Language="VB" MasterPageFile="MasterPage.master" CodeFile="Default.aspx.vb" Inherits="_Default" Debug="true" %>

<asp:Content ID="Home1" ContentPlaceHolderID="Home" Runat="Server">   

    <asp:ScriptManager ID="ScriptManager1" runat="server">
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <asp:Label runat="server" Text="Label"></asp:Label>
            <asp:Button runat="server" Text="Button" />
        </asp:UpdatePanel>
    </asp:ScriptManager> 

    <div style="position:absolute; top:81px; left:833px; z-index: 1; visibility:visible; height: 20px; width: 290px;
        font-size:xx-large; color: Maroon" align="right">
        Home
    </div>    

    <div style="position:absolute; top:130px; left:823px; z-index: 1; visibility:visible; height: 20px; width: 300px; text-align:right;">
        <p><%= mWelcomeMessage%></p>
    </div>

    <div style="position:absolute; top:210px; left:285px; z-index: 1; visibility:visible; height: 122px; width: 135px;">
        <img alt="" src="Images/Flagship_Store_30.jpg""/>
    </div>
    
</asp:Content>

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OK, I see.  Thank you.

Instead of having the user click the Button1 Ajax control on the web page, is it possible to have the user click a menu item on the MasterPages menu to change something on the web page?  I like the idea of MasterPages as it seems to make the coding easier without having to duplicate the same menus on all the web pages.

<%@ Page Language="VB" MasterPageFile="MasterPage.master" CodeFile="Default.aspx.vb" Inherits="_Default" Debug="true" %>

<asp:Content ID="Home1" ContentPlaceHolderID="Home" Runat="Server">   

    <asp:ScriptManager ID="ScriptManager1" runat="server" />
    
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Always">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server" Text = "" style="position:absolute; top:81px; left:833px; z-index: 1; visibility:visible; height: 20px; width: 290px;
                font-size:xx-large; color: Maroon" align="right"></asp:Label>
            <asp:Button ID="Button1" runat="server" Text="Button" />
        </ContentTemplate>
    </asp:UpdatePanel> 

    <div style="position:absolute; top:130px; left:823px; z-index: 1; visibility:visible; height: 20px; width: 300px; text-align:right;">
        <p><%= mWelcomeMessage%></p>
    </div>

    <div style="position:absolute; top:210px; left:285px; z-index: 1; visibility:visible; height: 122px; width: 135px;">
        <img alt="" src="Images/Flagship_Store_30.jpg""/>
    </div>
    
</asp:Content>

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You can add triggers to the update panel to indicate which controls should cause the update panel to redraw. You would need to change your update panel to something like:

    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server" Text = "" style="position:absolute; top:81px; left:833px; z-index: 1; visibility:visible; height: 20px; width: 290px;
                font-size:xx-large; color: Maroon" align="right"></asp:Label>
            <asp:Button ID="Button1" runat="server" Text="Button" />
        </ContentTemplate>
        <Triggers>
              <asp:AsyncPostBackTrigger ControlID="ID_Of_Your_Menu" />
        </Triggers>
    </asp:UpdatePanel>

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Please ignore my last post.  I need to rethink what I am trying to achieve before asking questions.  The Ajax controls now work and that is what I was looking for.  Thank you for the quick responses.

Thank you carl_tawn.  Much appreciated.

carl_tawn:

Can you also look at this question?  It is a followup one.

Thanks

https://www.experts-exchange.com/questions/26875076/How-trigger-Ajax-control-using-MasterPage-menu-item.html