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Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. 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:
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I have a master page which has an unordered list in this way:
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These links are directed to my content pages. I am able to highligt the selected list item on hover and on active.
But I do not understand how I can highlight the selected list item as long as the user is on that specific page/link (current list item). I know that we can specify a seperate body tag and id for each of the content pages and then use CSS to highlight the current list item, but all this code rests already inside a body tag in the master page.
I am having an unordered list like:
<ul style="list-style: square url(Images/rssIconSmall.png)">
<li><h3>All Items</h3></li>
<li>Item1</li>
<li>Item2</li>
<li>Item3</li>
I am trying to implement an html definition list in which each <dt> is the <header> in the accordion, and <content> is the <dd>. No matter how I write this out I can't get it to be valid markup because of the position of the <div>s inside the definition list where divs aren't allowed.
I also tried using a unordered list but had the same validation issues. I would really like to use the accordian, but not if I have to sacrifice valid semantic markup on my page.
i am working on a dynamic tree menu with nested <ul><li>-Lists.
when building the nested list every <li> element should contain a <div> with a small icon and a css-style behind.
here is my code:
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this way the result in the browser shows the name of every "aNavItem" but there are no icons. if i put the line to set the inner text of the div BEFORE adding the "imgMove" to it both things are shown - the name of the element and on the right the icon
the problem is that i want the icon to be on the left and then the text, but there is no icon at all with the code above (it looks like the setting of the inner text overwrites the already added image-control in the div-tag)
i am using a master page in my application. i added a content page by right clicking the content place holder in the master page. I get an issue "could not load type" but when i manully changed the masterpagefile attribute it worked fine. But in the content page all the style in my master page is lost,
View 2 RepliesI had created a master page, which uses a style element in the header section. It seems that when I create a style element in the content page the style from the master is disgarded.So my question is, how can i have a css style specific to the master page carried over into content pages and how can I have content page specific css style at the same time?
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I have web form and on it I have a DataList that is grabbing some Data from a Database and displaying them as a list.However when I look at the HTML Source Code produced, it's all Tables ! <td> and <tr> !!
How can I stop this ? I want my DataList to display the data like so:
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Can i use multiple CSS or Style Sheet with a single Master Page
View 1 RepliesI have two conditional stylesheets referenced in the head of my master page. Because the are contained in conditional comments to show for IE6 and IE7, the relative URL to the css file isn't getting rendered correctly. Is there any way to rebase the URL within conditional comments as can be done for import css references? Current code below:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="xxx_web.master.cs" Inherits="website_master_xxx_web" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-GB" lang="en-GB">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>xxx website</title>
<link rel="stylesheet" type="text/css" media="screen" href="../css/xxx_web_basic.css" />
<link rel="stylesheet" type="text/css" media="screen" href="../css/xxx_web_structure.css" />
<!--[if lte IE 6]>
<link rel="stylesheet" type="text/css" media="screen" href="../css/xxx_web_ie6.css" />
<![endif]-->
<!--[if lte IE 7]>
<link rel="stylesheet" type="text/css" media="screen" href="../css/xxx_web_ie7.css" />
<![endif]-->
</head>
I would like to programmatically access a div in a style sheet for my master page and change its height value depending on the content page loaded.
Can this be done using Javascript in the Master page or in the code behind for the respective page? What I would like is something such as this if possible
When this content page loads, change the height value of this div in the css file
I don't want to use separate Master pages as this seems to defeat the whole purpose of the Master page
In my application i used drop down list dynamically so that if i enter the the value in the text box that many drop down list genrated with data from database. if i select the different iteam in the drop down list it will not changed it remains the first iteam of the dropdown list. if i use post back event is true in code part that drop down list is not visible.
nt i = 0; i < rows; i++)
{
TableRow row = new TableRow();
for (int j = 0; j < column; j++)
{
TableCell cell = new TableCell();
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Is it possible to iterate through an unordered list like the following in codebehind?
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I was hoping to iterate through all the li elements of the ul checking whether NavigateUrl is equal to the current url. If it is, I was going to add a CssClass to give it a different appearance.
I think I know how to compare it to the page's url and to how to add the css class. I'm just not quite sure how you iterate through li items using a HTML Generic control.
I need to render a unordered list with the data obtained from database using asp.net/C#.My data looks something like this.
id Name Depth
1 ELECTRONICS 0
2 TELEVISIONS 1
3 Tube 2
4 LCD 2
5 Plasma 2
6 Portable electronics 1
7 MP3 Player 2
8 Flash 3
9 CD Players 2
10 2 Way Radio 2
using the above sample data I need to render an unordered list based on the depth, in the following format
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im tring to add style to master page the same way i add script
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the only way the css recognized is by adding the content to the master page
what am i doing wrong?
Is it possible to render a TreeViewControl as an unordered list instead of a table?
View 2 RepliesI've got this web control that I've been dynamically adding controls to but now the requirement is to add an ordered list around the controls.
To render the controls I add the controls to ControlsCollection
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How do I position the controls in the list items?
Do I need to approach the problem differently?
i want ot change the style of the page number in gridview . How can i do it? What attribute of pagersettings can i use?
View 5 RepliesI have a tabbed list that changes the div with javascript when selected. I would like to have have other pages on my site lead to and set a list item to active. With the code below my content_1 list item is set to active, I would like to have the active tab changed if say I selected a content_3 link from another page and I would like to set a custom url that will set content_3 to active when i go to the page with the list.
<div class="tabbed_area">
<ul class="tabs">
<li><a href="#" title="content_1" class="tab active">Web Design</a></li>
<li><a href="#" title="content_2" class="tab">Web Design</a></li>
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Learning how to do a master page in asp.net. Trying to figure out how my style sheet interacts with respects to the master page and content page. I can get HTML tags like body and the style sheet to react. But when I call the ID attribute of a label no styling takes place. What am I missing here as far as interaction? BTW I'm using VS2008
CSS sample:
body
{
height:1200px;
width:920px;
border-style:solid;
border-color:blue;
padding:10px 10px 10px 10px;
}
#toptext1
{
position:relative;
top:-225px;
right:-500px;
font-size:22px;
font-weight:bold;
}
From the master page:
<body>
<form id="form1" runat="server">
<asp:image id="cookNookLogo" ImageUrl="images/Logo.gif" runat="server"
AlternateText="CookNook" Width="449px"></asp:image>
<p>
<asp:Label ID="toptext1" runat="server" Text="Quality Recipes, Hints and Supplies"></asp:Label>
</p>
From the content page:
<%@ Page Language="C#" MasterPageFile="~/CNMasterPage.master" AutoEventWireup="true" CodeFile="Home.aspx.cs" Inherits="Home" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
<link href="App_Themes/cn/cn.css" rel="stylesheet" type="text/css" />
</asp:Content>
When I was doing this without a master page it worked so where am I going wrong with the attributes?
i have an unordered list <ul><li><ul><li>
I had made a table to fill the unordered list but how to fetch that data into li and ul the table consists of home, organisation (with children as policy, employeesdetails), and so on.. How do i fill these ul and li's and children of li's with data from sqlserver2005 table?
I'm not supposed to use any asp.net built in controls like asp.net menu
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I've data which looks something like this.
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To convert the above data into unordered list based on depth, I'm using the following code
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But the resulting unordered list doesnt seem to be forming properly(using which i am constructing a tree).For example "Site " with id '180' is supposed to appear as a direct child of "Televisions" with id '1',is appearing as a direct child of 'Flash' with id '191' using my code.so in addition to considering depth,I've decided to consider itemid as well in order to get the treeview properly.Those rows of the table with itemId not equal to null are not supposed to have a child node(i.e.,they are the leaf nodes in the tree) and all the other nodes can have child nodes.
Update:
The 'itemid' column refers to the id of an item which is present in another table.This column just in identifying if an item has any sub items(i.e., 'name' in my data in this case has any other unordered lists under it).
HtmlGenericControl li = new HtmlGenericControl("li");
tabs.Controls.Add(li);
li.InnerText = "new menu";
HtmlGenericControl anchor = new HtmlGenericControl("a");
anchor.Attributes.Add("href", "page.htm");
anchor.InnerText = "TabX";
li.Controls.Add(anchor);
I am using above code on my master.cs file to add new line like
<li id="one"><a href="page.htm"></a></li>on my .master filebut it not working...what i missingcode not showing any error..
I can add NavigatorMenu item in Master Page like this:
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How I can do it from content page? I would like something:
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I have a question about master page.After i pushed button i would like to change my master page to another master page for that page, is that possible?
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