Accessing user controls from pages within Master pages - ng.asp-net-forum.master_pages_themes_and_navigation_controls

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10/3/2007 9:51:50 AM

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7 Items, 1 Pages 1 |< << Go >> >|

	slinkycurtis
	Asp.Net User

Accessing user controls from pages within Master pages

10/3/2007 9:51:50 AM

0/0

Hi,

I have a problem with a web-site I have built which users Master Pages. One of the pages has a userControl within it, and in the codebehind on the page being loaded into the master page, I access methods and properties on this control. All builds fine.

When I run it, the control does not load, and looking at the source code, the reason is that the control is prefixed with the name of the container of the master page, "ctl00_contentPage" which stops this control loading properly. As soon as I amend the HTML generated and delete this prefix from the control name it works fine!

Any ideas?

Thanks

Paul

	naturehermit
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 11:12:04 AM

0/0

Use Control.ClientId to get the correct Id

Please Mark Post that helped you as answer, also include a summary of what solved the problem as it helps others in similar situations

	slinkycurtis
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 11:28:13 AM

0/0

Ok, I can see how using Control.ClientID would get me the server control identifier, but how should this be used in the code behind for my page being loaded into the master page? To give you more of an idea, I am using a map userControl in my page, and have code like:-

HotelMap.ClearPins();
HotelMap.Zoom = 10;
HotelMap.RegisterMap();

within the page to access properties and methods of that user control. This control ID gets modified at run-time, so how would I use the ClientID property in this context?

Thanks for replying...

	naturehermit
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 11:54:51 AM

0/0

Can i look at your complete code, where you are accessing it so that I can guide you. Please include details. ClientId will provide the actual id on the client.

Please Mark Post that helped you as answer, also include a summary of what solved the problem as it helps others in similar situations

	slinkycurtis
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 12:16:30 PM

0/0

No Problem.

The masterpage contains the following element into which the other pages are loaded:-

<asp:contentplaceholder id="contentPage" runat="server">

</asp:contentplaceholder>

</div>

The page location.aspx being loaded into the masterpage contains the following page directives:-

<%@ Page Language="C#" MasterPageFile="~/EjMasterPage.master" AutoEventWireup="true" CodeFile="location.aspx.cs" Inherits="location" Title="Location page" %>
<%@ MasterType TypeName="EjMasterPage" %>
<%@ Register Src="LiveMap.ascx" TagName="LiveMap" TagPrefix="uc1" %>

The control is loaded into the page in the following code within the <BODY> of the page

In the codebehind for location.aspx, the following code accesses properties and methods of this control:-

HotelMap.ClearPins();
HotelMap.Zoom = 10;

foreach (Photo photo in Photos.PhotoCollection)
{
    if (photo.Latitude != 0)
    {
         HotelMap.AddPin("<img src=" + photo.SmallUrl + " />", photo.Title, Convert.ToDouble(photo.Latitude), Convert.ToDouble(photo.Longitude), "images/camera.jpg");
    }
}

HotelMap.RegisterMap();

The HotelMap control creates javascript which is injected into the head of the page in the RegisterMap() method.

The resultant page fails to load this control because the reference to the control above gets changed to:-

<div class="map contain">
	<div class="mapBorder">
		<div id="ctl00_contentPage_HotelMap_Map" style="height:300px;width:300px;position:absolute;">	
                                </div>		
                </div>
</div>

Let me know if you need more info and apologies for the length of the post!

	slinkycurtis
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 12:30:26 PM

0/0

Hold on.....

The problem is with the control that is generating the javascript loaded into the head tag - changing this to this.ClientID should do the trick.....

Think you've nailed it, will test and mark as answered soon after!

Thanks....

Paul

	naturehermit
	Asp.Net User

Re: Accessing user controls from pages within Master pages

10/3/2007 1:07:40 PM

0/0

Include <%=UserControlName.ClientId%> in javascript and thats it. Is it sorted?

Please Mark Post that helped you as answer, also include a summary of what solved the problem as it helps others in similar situations

7 Items, 1 Pages 1 |< << Go >> >|

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Web:
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Master Pages and Site Navigation : The Official Microsoft ASP.NET Site NET pages within that folder. Additionally, each folder contains a ... Create a folder in the website called UserControls and add to that a new item of type ...
Visual Studio Magazine Online | Feature: Create Master Pages in ... NET, you were forced to embed user controls in every page to get consistency. .... NET controls on a master page by accessing properties within the new ...
Master Pages and Usercontrols - object reference not set - .NET ASP Master Pages and Usercontrols - object reference not set. ... to access a property from the Continents usercontrol and is done using ...
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ASP.NET v2.0 V: Master pages and navigation :: DotNetJohn Nov 14, 2007 ... Note that as per user controls embedded in pages the order of events is ... page have a property Master allowing access to the master page. ...
Master Page Inheritance and User Controls - Rick Strahl's Web Log I didn't try to access the main master directly from the pages or user controls -- maybe that will work with master.parent.master or something. ...
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