Web Forms :: Why Master Control Page Code Behind Not Working
Mar 12, 2010
My hosting service is all messed up and my application keeps recycling. I am not able to figure out why my application is recycling. I am told that my application is using more than 100MB allocated memory but I just do not see what is wrong or how much is the optimized memory is required for my application. So in my master page I am trying to capture if one of the session variables is null and redirect to login page in the master page.in my master page I have the following code:
if ((Request.Cookies["UserID"] != null)&&(Session["UserID"]!=null))
{
do something;
[code]...
Object reference not set to an instance of an object. referring to the session["UserID"] being null in the page where I thought the master page will handle the null value for the session before the page!
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Similar Messages:
Oct 21, 2010
Some time ago I converted an old windows application to a web application. This web application works fine as a stand alone app. I was recently informed that my client had a new standard layout and they are using a master page. They sent me the master page.
The web application is quite basic in that it makes a number of calls to a web service to retreive a list of customer, retrieve list of products and allows customer to create an order containing products.
I did the following to get make use of master page:
Copied it to my solution Update the page directive to include the MasterPageFile attribute and set it to point to master pageAdded the relevant content areas to my page Copied my code (control declarations etc) into the relevant content areas.The application compiles correctly and renders as expected. However, it does not behave as expected.
For example, I display a list of customers in a GridView. The user can select a customer by clicking the select button that is present for each row in GridView. I do this once and select a customer the page is posted back and relevant row is selected. I select a different customer and the page it posted back but this time the selected row does not change. It is still shown as the first row i selected.
This functionality works as expected if i remove the master page attribute and content areas.
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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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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?
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Nov 29, 2010
I have two master pages in my application(Suppose Master Page A and Master Page B). I have written a server side method in Master Page A.
How to access this method from code behind of Master Page B?
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Apr 19, 2010
How you can send values from master page to user control in code behind (not through URL)?
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Aug 12, 2010
I need to display a control consistently across a set of pages. So I'm using a MasterPage to do that in ASP.NET/C#. However I also need to programmatically access this control, mostly provide options to view/hide depending on whether the controls checkbox is clicked.
Here is the Source for the MasterPage
<div id="verifyInitial" runat="server">
<asp:CheckBox ID="chkInitialVerify" runat="server"
oncheckedchanged="chkInitialVerify_CheckedChanged" />
I agree that my initial data is correct.
</div>
<div id="verifyContinuous" runat="server">
<asp:CheckBox ID="chkContinuousVerify" runat="server"
oncheckedchanged="chkContinuousVerify_CheckedChanged" />
I agree that my continuous data is correct
</div>
Now in the code behind I want to perform the following operations. Basically if a person clicks on the checkbox for the initial div box, then the initial box disappears and the continous box shows up. However it seems that the code behind for the MasterPage does not activate whenver I click on the checkbox. Is that just the way MasterPages are designed? I always thought you could do add some sort of control functionality beyond utilizing the Page Load on the Master Page.
protected void chkInitialVerify_CheckedChanged(object sender, EventArgs e)
{
verifyContinuous.Visible = true;
verifyInitial.Visible = false;
}
protected void chkContinuousVerify_CheckedChanged(object sender, EventArgs e)
{
verifyContinuous.Visible = false;
}
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Feb 3, 2011
My computer system froze on me, the mouse froze, cntrl-alt-del, did nothing, so I reset it. Did a disk check, and now everything seems fine except for my master Page html code which I was in the middle of editing when it happened. The VB code-behind file is still ok, the designer file still shows ok with all of the controls in it, but I can't get into desgn or source view. It just opens and gives a whole page of hesixecimal code such as as:
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
It just gives me a whole page full of numbers like this. I haven't backed up for a few weeks and so I hope I can get this back.
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Nov 3, 2010
Its not executing statements in if block in my method
Master Page:-
page load event:-
Control c = new Control();
DoSomething(c);
My method:-
protected void DoSomething(Control control)(
{
foreach (Control c in control.Controls)
{
if(typeof(c).Equals(Telerik.Web.UI.RadEditor))
{
Telerik.Web.UI.RadEditor rad = c as Telerik.Web.UI.RadEditor;
label1.Visible = true; label1.Text = "dhchk";
rad.CssFiles.Add("~/styles/myStyle.css");
rad.CssFiles.Add("~/styles/myStyle2.css");
rad.CssFiles.Add("~/styles/myStyle3.css");
}
else
{
DoSomething(c);
}
}
}
my content page:-
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<telerik:RadEditor ID="Editor1" EnableEmbeddedBaseStylesheet="false" EnableEmbeddedSkins=false runat="server">
</telerik:RadEditor>
<telerik:RadEditor ID="Editor2" EnableEmbeddedBaseStylesheet="false" EnableEmbeddedSkins=false runat="server">
</telerik:RadEditor>
[EDIT] ok when debugging..I rt clicked "c" and then Quick watch...it says "The name 'c' does not exist in the current context" (?!?!) how so ?
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Feb 18, 2010
I have a nested master page that has its own master page. The parent master page has a property defined in its code behind.
Public ReadOnly Property SelectedPage() As String
Get
Return _selectedPage
End Get
End Property
How can I reference the parent master page's property from within either the child master page's code behind Page_Load or aspx template page?
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Dec 30, 2010
Ajax calendar control not working properly with content place holder of Master Page.Most of time Calender Control hides when mouseover with out changing date in content place holder of Master Page.same code works in normal aspx pages.
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Jun 13, 2010
I have a page with features supplied from both a master page and a child master page.In the content placeholder for the head in both master pages I have supplied the link to the stylesheet for the site.In Design View in VS 2008 the CSS code seems to be functioning correctly.When viewing in a browser the CSS does not appear to be applied at all.
Here is the CSS code for the div elements within the main content placeholder:
[Code]....
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Mar 13, 2010
I am receiving a Parser Error with all my pages in a particular folder:
Parser Error Message:
The file '/railroad/freightcars/covered_hopper/MasterFiles/Freightcars.master' does not exist.
Line 1: <%@ Page Title="Freight Car Photos - CP Covered hoppers - CoveredHopperPhotos.com" Language="C#"
MasterPageFile="~/MasterFiles/Freightcars.master" AutoEventWireup="true" CodeFile="cprail.aspx.cs" Inherits="railroad_freightcars_covered_hoppers_cprail" %>
It seems like the ~ is not resolving; none of my .aspx pages in this folder work. All my pages in several other folders work fine.
I had this problem with another folder when i first published pages to a folder named covered_hoppers. Since i couldn't figure out the problem, i renamed the folder to covered_hopper and re-published.. all worked fine for a couple of months until yesterday. Now i am having the same problem. No problems on my local copy; never had this error with any other folder in my site.
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Jul 29, 2010
Im developing a website in asp.net where i want to connect the Payment gateway(rbs worldpay) as instructed im connecting to the payment gateway...the problem is, there im using some html button to connect the gate way as per the instructions the input button should be in form tag .in masterpage inherited aspx page we dont have any form tag the button is working properly when i placed that html code in content placeholder 1 but the button is displayed above the page......if i place that code in content place holder 2 the button is not working...........
im placing the code
[code]....
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May 20, 2010
I have a master page with accordion. Accordion binds link buttons inside datalist in its content template. Everything works fine but when i open this page in firefox my link buttons alongwith SignOut Link button stops working?
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Sep 1, 2010
I'm facing odd problem with Page.GetRouteUrl() method. It is working only on regular content pages and doesn't want to work on my master pages. I'm using simple snipet: <%# Page.GetRouteUrl("Default", null).ToString() %>, when I put it on some page, it generates "/Default", when I put it on master - I get "". I've tried calling Master.GetRouteUrl() instead but still no luck, it always returns empty
string. Funny thing is that it works in code behind (bothPage.GetRouteUrl() and MAster.GetRouteUrl() works) of the master page, only markup seems to be affected. I bet it is somehow related to the configuration since I have recently moved from ASP .NET 3.5 to 4.0 on IIS7 with integrated pipeline.
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Jun 28, 2010
i have build with simple master page with a child page,it is working fine, i deployed it on iis,it is working fine,when I hosted it on server, and hit the url , only child page is coming and master page content is not displaying,what may be the reason?the master page code--->
[Code]....
the child page code--->
[Code]....
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Mar 22, 2011
I have added a favicon to my site but it will not appear. I have the following two lines in the master page markup:
[Code]....
When the first page that uses the master page is rendered in the browser, these links are:
[Code]....
This is as I would expect yet the favicon does not appear. It appears fine on any basic html pages but simply won't on any pages that are based on the master page.
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Feb 3, 2010
In my default.aspx I have;
<%@ Page Title="" Language="VB" MasterPageFile="~/masterpage.master" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" AspCompat="true" %>
<% @ MasterType VirtualPath ="~/masterpage.master" %>
I have setup properties, for example;
Private _theskin As String
Public Property theskin() As String
Get
Return _theskin
End Get
Set(ByVal value As String)
_theskin = String.Empty
End Set
End Property
I was then expecting to be able to access these properties from the default.aspx.vb page in this way;
If Master.theskin = foo Then
do things
End if
In the default.aspx.vb the code is highlighted with blue underline and says;
theskin is not a member of system.Web.Ui.Masterpage
Am I making an error somewhere along the line? Do I need to do more to be able to expose the properties to default.aspx.vb?
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Jan 10, 2010
my Master page placed textbox & link button. Linkbutton event raise only if clicked twice, is there anyway solution for raise the event in single click
[Code]....
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Aug 9, 2010
I wish to place a sub in the code behind of my master page, that will be used to assign variables used in the content pages based on query string values. I would like to see advice on general syntax as it relates to the relationship between master pages and their content pages.I would much rather pursue this route as opposed to repeating the same code on every content page.
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Feb 1, 2010
I have created a master page for website layout in my project. I have used a linkbutton control to trigger between Login/Logout functionality but when I click on this control the underlying click event handler is not being executed anyway.When I click on this control, the page pointed by its PostBackUrl property is open which should probably occure after its click event hander have been executed.
[Code]....
and the LinkButton Control is
[Code]....
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Mar 21, 2011
How to Create Master Page in Code Behind Dynamically?
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Sep 16, 2010
How to access controls in master page using javascript? The master page consists of a search textbox, on key down event of the control I call a javascript function writtern inline of the master page. I get the value of entered in textbox in that javascript function. I have tried giving document.getElementById("<%=txtSearch.ClientID %>").value as well as document.getElementById("txtSearch").value. Both display error. I have to access the textbox control from within the master page itself!
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Jul 18, 2010
I've been working with ListView for a long time, but I haven't been using it's built-in events so far. Now I was trying and was stuck. Until I moved both LinqDataSource and ListView to another page, without a master page.
Then it worked. Same happened with GridView as well.
I do not use Update Panel. Just master page. And if I use manual methods for edit, insert, delete then it doesn't fire OnItemCommand.
Is there a known uncompatibility with databound controls and master pages? Because I couldn't find anything about it on Google.
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