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

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Hide A User Control In A Master Page From A Content Page?

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How can I hide a user control on the master page from a content page? This is code I have on my content page's load.

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Web Forms :: Hide Master Page Html Table Row From Content Page?

Jan 28, 2010

I have one master page that is used to gather information from a user. It contains asp.net labels and textboxes within a table. For example, the master page contains fields for Name , Phone, Address, etc.

There are content pages that are created to add to the information that needs to be gathered. For example, the content page, Loan Application, could ask for Loan Amount, LTV, etc.

In addition to this, certain content page forms do not need to show a particular master page field. For example, the content page may not need to ask for Phone.

The table rows are stored as public properties in the master page so I can hide them in the content page code behind.

public bool HomePhoneRow
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set { trHomePhone.Visible = value; }
get { return trHomePhone.Visible; }
}

So, in the content page code behind, I have this:

Master.HomePhoneRow = false;

The functionality works perfect, but I don't like how the space is reserved on the page. You can tell that a row was removed. I've tried style="border-collapse:collapse" on both the <table> and <tr> elements. I've also tried to set the row height as a public property and alter that.

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I used the following link for doing the page preloader.

[URL] 

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

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Jan 14, 2010

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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.

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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

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May 7, 2015

I have hyperlink in page

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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");
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Line 16: }
Line 17: }

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Below is my Aspx code and code-behind:

[code]....

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[CODE]....

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