Web Forms :: How To Reference A Control On A Master Page From A Content Page Code-behind

Aug 5, 2010

I am attempting to access a textbox control on a master page from a code behind base class but having problems.

I have 3 levels of master pages. m1.master is the master page for m2.master which is the master page for m3.master.

m3.master has a textbox as shown below

<%Master
Language="C#"
MasterPageFile="~/m2.master"
AutoEventWireup="true"
CodeFile="M3.master.cs"
Inherits="M3"
%>
<asp:Content
ID="Content5"
ContentPlaceHolderID="M2"
Runat="Server">
<asp:TextBox
ID="text1"
runat="server"
></asp:TextBox>
<asp:ContentPlaceHolder
ID="M3"
runat="Server"></asp:ContentPlaceHolder>
</asp:Content>

I have a content page c1.aspx that uses m3.master as its master page as shown below:

<%@
Page
Title=""
Language="C#"
MasterPageFile="~/m3.master"
AutoEventWireup="true"
CodeFile="c1.aspx.cs"
Inherits="_c1"
%>
<%@
MasterType
VirtualPath="~/m3.master"
%>
<asp:Content
ID="Content1"
ContentPlaceHolderID="M3"
Runat="Server">
</asp:Content>

My content page codebehind class inherits from a base class BaseForm

public partial
class
_c :
BaseForm{}

The problem that i am having is that I cannot access the texbox from the class BaseForm. The BaseForm code is as follows:

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public...........

I'm getting a null reference exception for txt1

View 8 Replies


Similar Messages:

Web Forms :: What Is The Syntax For Finding A Control In A Content Page From Javascript Code In The Master Page

Jan 16, 2011

I have a control in a content page that I want to find the width and left attributes of the style. I am trying to find this from Javascript code that exists on the Master Page. How do I do that?

View 1 Replies

Web Forms :: Reference Control On Third Level Master Page From Content Base Class?

Aug 8, 2010

I am attempting to access a textbox control on a master page from a code behind base class but having problems. I have 3 levels of master pages. m1.master is the master page for m2.master which is the master page for m3.master.m3.master has a textbox as shown below

<%Master
Language="C#"
MasterPageFile="~/m2.master"
AutoEventWireup="true"
CodeFile="M3.master.cs"
Inherits="M3"
%>
<asp:Content
ID="Content5"
ContentPlaceHolderID="M2"
Runat="Server">
<asp:TextBox
ID="text1"
runat="server"
></asp:TextBox>
<asp:ContentPlaceHolder
ID="M3"
runat="Server"></asp:ContentPlaceHolder>
</asp:Content>

I have a content page c1.aspx that uses m3.master as its master page as shown below:

@
Page
Title=""
Language="C#"
MasterPageFile="~/m3.master"
AutoEventWireup="true"
CodeFile="c1.aspx.cs"
Inherits="_c1".................

View 2 Replies

Web Forms :: How To Call A Javascript Function On A Master Page From A Content Page Control

Jan 24, 2011

I have a javascript function on my Master page, how do I access it with a dropdownlist of a content page. Not from codebehind, I can do that, but from the control itself such as the onSelectedIndexChanged event.

View 11 Replies

Web Forms :: How To Remove Master Page Prefix From Control ID After Rendering Content Page

Jun 26, 2010

how to remove master page prefix from control ID after rendering content page

i m using master page in my web application, i am using a java script that works on one of my div id and i am genrating div at run time using C# code, problem is that one one of my content page rendred a prefix ct100 attached on that div,

How can i remove that prefix from my server side control (assume panel) id

View 2 Replies

Web Forms :: How To Use StaticSelectedStyle In Menu Control With Master Page/Content Page

Jan 14, 2010

I have a MasterPage where I use the menu control. Clicking a menu item loads a new content page. That part works fine.

I would like to use staticselected style to change the look of the selected menu item. However, when the new content page loads, the staticselectedsyle formatting does not work.

View 6 Replies

Web Forms :: Access User Control Of Master Page In The Content Page

Jan 27, 2010

I have a user control in the master of my website and I want change some property of that control from the content page.

View 3 Replies

Web Forms :: Find Hyperlink Control In Master Page From Content Page?

May 7, 2015

I have hyperlink in page

<asp:HyperLink ID="HyperLink1" runat="server" class="lblMenuMessage" NavigateUrl="~/Admin/صندوق-پیام.aspx">صندوق پیام</asp:HyperLink>

and css

.lblMenuMessage
{
float:right;
text-align:right;
width:150px;
margin:0 12px 0 0;
color:white;
text-decoration:none;
}

and I want change it's color in behind code so I wrote:

(this.Master.FindControl("HyperLink1") as HtmlGenericControl).Style["color"] = "black";

but below error happen:

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error: 

Line 13:
Line 14: (this.Master.FindControl("ADMenuMessage") as HtmlGenericControl).Style["background-image"] = Page.ResolveUrl("~/Image/ADactivmenu.png");
Line 15: (this.Master.FindControl("HyperLink1") as HtmlGenericControl).Style["color"] = "black";
Line 16: }
Line 17: }

how I can change hyperlink textcolor in behind code?

View 1 Replies

Web Forms :: Access Control Declared In Master Page In Content Page

Dec 8, 2012

How to access a control declared in a Master Page in a content page.I have a ModalPopUpExtender in Master Page and i want to access it from a content page, how can i do that.

View 1 Replies

Web Forms :: Can Modify The Properties Of A Content Page Control From An Event Fired From The Master Page?

Feb 25, 2011

Can I modify the properties of a content page control from an event fired from the master page?create a delegate and event on master page wire up the master page in the content page create the event handler (function) on the content page modify for example:

contents of the Text property of a textbox render a control visible (or hidden) etc...

View 4 Replies

Web Forms :: Accessing Public Property Inside User Control In Master Page From Content Page

Nov 9, 2010

I have user control in the master page. user control code behind page having public property called SetValue.

Now I want to set the value from content page .

View 4 Replies

Web Forms :: Can't Access A Control In The Master Page From A Content Page

Dec 16, 2010

Does any know why I can't access the my custom user control StatusBar which is declared inside a masterPage?

In the ContentPage, I tried referencing the control this way "this.Site.stastusBar" and "this.Master.Status" and neither one works. Both instellisense warns me that "statusBar" does not exist.

Below is my Aspx code and code-behind:

[code]....

View 3 Replies

Web Forms :: Getting Value From User Control In Master Page In Content Page

May 11, 2010

There need to read selected value from drop down list which is in user control (user control is placed in master page) in contect page.

View 1 Replies

Web Forms :: Access Master Page Control Value On Content Page?

Mar 25, 2010

on master page, i have declared a label control & set value to it.now on content page, i m able to find the control, but the value is alwasy null & not the one which was set.when i debugged, content page's load event is called first, after that the master page is called.so where should i access the master page control so that i get the set value.

View 4 Replies

Web Forms :: Hide Control In Master Page From Content Page

Mar 27, 2013

I have master page with ajax accordin menu and I have content page "login.aspx"

In login 2 textbox - username and password , my problem is menu can display only the username and password is correct otherwise it is not display to user

username and password check from the database

View 1 Replies

Web Forms :: How To Set Value Of Master Page Control From Content Page

May 14, 2010

I am developing a website. I have created a master page called Master.master which has a asp Label contol in it. I have used this master page as a template for the after login pages.

I am setting the value of the label on the master page to the session variable of User_Id that is generated after successful login.

My problem is that I have to set the value of the asp Label in the master page manually in the code behind of every after login page I visit.

Is there any way to retrieve the value of the session User_Id directly in/from the master page's code behind rather than setting the value in each and every page's code behind file.

Basically i want to set value of a master page label directly to a session that is generated after successful login. How do I do it?

View 5 Replies

Web Forms :: Hiding Repeater On Master Page From Content Page / Access From Content Page?

Oct 6, 2010

My project has the following repeater menu shown on the Master Page. I need this menu to remain hidden until the user logs in. How do I access from content page?

[Code]....

View 2 Replies

AJAX :: Finding Control From Master Page Inside Tabcontainer In Content Page?

Oct 16, 2010

I have a codebehind.vb for a master page from which I'm trying to find a hiddenfield in the content page. I was finding it like this without a hitch...

[Code]....

View 2 Replies

AJAX :: Access Control Inside LoginView Placed In Master Page From Content Page

Dec 2, 2013

this hierarchy of master page

|--main.master 
|-- index.aspx 
|-- user.master 
|-- login.aspx
 
<asp:LoginView ID="HeadLoginView" runat="server" EnableViewState="false">
<AnonymousTemplate>
[ <a href="~/PageCommon/login.aspx" id="HeadLoginStatus" runat="server" color="#87cfe6">Log In</a> ]

[CODE]....

View 1 Replies

AJAX :: Master Page Control Update From Content Page Button_click?

Mar 8, 2010

1. I have master page with script manager and contentPlaceHolder. One TextArea is outside ContentPlaceHolder.

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

[code]....

View 2 Replies

AJAX :: How To Access Image Control In Master Page From Content Page

Oct 9, 2013

how to upload image from child page to image field on master page in asp.net vb.

View 1 Replies

AJAX :: Unable To Update Control In Master Page From Content Page?

Sep 25, 2012

I have a  marqueein master page  without any updatepanel .Am updating the content of marquee from content page but it does not reflect. e.g:

 ((HtmlGenericControl)Master.FindControl("maq1")).InnerText =" fdf fgf gf";

View 1 Replies

Using C# - How To Set A Content Page Property When Users Clicks On A TabStrip (user Control) In Master Page

Feb 10, 2010

I have a web page (Orders.aspx) that gets some orders and show them in a Gridview .The orders list I get from DB is depend on a field named Status. The page has a master page that contains a Tab user control. The user control has several tabs and every tab has a different Status. Therefor, when the user clicks on every tab, I want to pass a value as status to my content page (Orders.aspx) and then select the orders from DB based on status.

View 1 Replies

AJAX :: Find Script Manager Control In Master Page And Access It From Content Page

Dec 11, 2013

I looked at your example URL....I have ScriptManager in masterpage how call  ScriptManager from masterpage in editorPage.aspx if (Script Manager 1.IsInAsyncPostBack)

View 1 Replies

AJAX :: How To Access Master Page Dropdownlist Control SelectedIndexChanged Event Inside The Content Page

Mar 20, 2010

i want to give id of dropdowncontrol inside master page, how can i assign this control id in trigger of updatepanel inside content page

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved