Element 'ToolkitScriptManager' Is Not A Known Element
Jul 10, 2010
So I have a file called WebParts.aspx which looks like this -
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebParts.aspx.cs" Inherits="e.WebParts" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!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" >
<head runat="server">.........
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Feb 2, 2011
I have noticed that when I create a website in a network drive and use the Ajax toolkit I get :
Element 'ToolkitScriptManager' is not a known element
I also noticed that after adding the ToolkitScriptManager it doesn't add the ID in the source code, it looks like this:
<asp:ToolkitScriptManager runat="server"></asp:ToolkisScriptManager>
Is missing the ID="ToolkitScriptManager1" part.
This doesn't happen when I create the site in my local drive. Is there a workaround to this. Even if I add the missing parts, I keep getting the same error.
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Sep 29, 2010
I'm looking at an asp.net application, i notice that there are assemblies defined into two places. In web.config there is configuration/system.web/compilation/assemblies/add elements. In the project file there are references setup under the Project/ItemGroup/Reference elements.
I was wondering, what is the difference between assemblies/references added in either location?
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Feb 19, 2010
Is there a way to retrieve values from the form object using the id element instead of the name element?
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Jan 7, 2011
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[code]....
I want to give border line to first td element which contains the colspan and rowspan. Not to the entire row.
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Dec 13, 2010
I would like to select an element that is in the same TR as another element I found with a selector. The selector itself: $("input[name='sMessageValue']","#messageTable") Now I have this element and got its value I would like to find a checkbox located in the same TR, i tried this as starting point : $(this).(':parent').val(). But seems not the right thing to do.
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Aug 22, 2010
You're making a website with ASP.NET 4.0/C#, although xml alone is suitable for this example. The site will have a site map and a default page with a menu control, as follows:Web.sitemap
<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
<siteMapNode url="~/default.aspx" title="Home" description="">
<siteMapNode url="~/1.aspx" title="Link 1" description="" />
<siteMapNode url="~/2.aspx" title="Link 2" description="" />
<siteMapNode url="~/3.aspx" title="Link 3" description="" />
[code]...
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Nov 3, 2010
Element 'content' is not a known element. this can occur if there is a compilation error in the website, or the web.config file is missing.
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:Content --- showed a green wavy line , and on hover displayed the above error.
Now I am having certain problems.
1. Visual Studio 2010 hangs when I try to use ToolBox.
2. Intellisense for asp.net controls is not working.
I have tried replacing web.config file (frm backup) , tried to debug - it doesnt show anything.
All other websites are working alright. Have problem with only one of the websites.
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Jan 25, 2011
I upgraded from VS 2008 to VS 2010 and now the AJAX elements are not recognised by the source code editor, e.g. UpdatePanel, ScriptManager, etc. I get warnings in VS and no intellisense for those elements. When I run the site, all the AJAX controls work OK though.
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Aug 30, 2010
I got this errors while trying to use an example from the ASP.NET 3.5 Unleashed book.
Webform1.aspx
[Code]....
LengthValidator.cs
[Code]....
As from the book's note, I think I added this line correctly:
[Code]....
However, the compiler kept complaining that:
Warning 1 Element 'LengthValidator' is not a known element. This can occur if there is a compilation error in the Web site, or the web.config file is missing. C:Visual Studio 2010 ASP.NET ProjectsWebApplicationFourWebApplicationFourWebForm1.aspx 16 17 WebApplicationFour
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May 9, 2010
I am using dotnetCHARTING: the dll is installed in the GAC and referenced in my web.config (all versions appear to match). The project has a reference to the dll.
web.config:
<add assembly="dotnetCHARTING, Version=5.3.3540.17054, Culture=neutral, PublicKeyToken=af2cd47db69d93bd"/>
The site code compiles ok, but all aspx pages using the charting library complain that the Chart tag does not exist (warning that it might be a compile error). The aspx pages do not render the charts.
Each page has a reference to the assembly:
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Jun 30, 2013
What does that means below warning:
Element 'AsyncPostBackTrigger' is not a known element. This can occur if there is a compilation error in the Web site, or the web.config file is missing.
My app is working properly but visual studio showing warning like that.
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Apr 4, 2013
Element 'ScriptManager' is not a known element. This can occur if there is a compilation error in the Web site.
Element 'UpdatePanel' is not a known element. This can occur if there is a compilation error in the Web site.
tried many thingschecked web config filereinstalled ajaxtoolkit
but nothing is working
getting error in the whole projectalong with this getting error for other asp,net controls also
Element 'TextBox' is not a known element. This can occur if there is a compilation error in the Web site.
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May 31, 2010
can i take div element within the td element of the table. bcoz when i taking, it's not showing in the design mode of asp.net VWD?
syntax is
[code]....
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Aug 23, 2010
I converted a forms website into an application and everything has been working just fine until now. I keep getting the green squiggly lines and the error that Element 'X' is not a known element. This is on almost every element, Gridview, Label, Update Panel, Hyperlink Field, Bound Field, etc...
my web.config contains
<pages theme="basic">
<controls>
<add tagPrefix="ajax" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit"/>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls>
</pages>
so ajax and asp are viable prefixes. The very odd thing is that it is only happening on a few user controls, all other user controls are fine and the errors never show up. I have tried rebooting and everything and nothing seems to fix it. All masterpages, web paages, and about 90% of the user controls are fine, its only on a few user controls and super annoying!
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Oct 9, 2010
I'm trying to programatically add a second class to a <td> element in C#.
The element I want to add the class to already has a class assigned to it.
If I do something like
myObject.CssClass = "MyClass";
it simply overwrites the original class.
I suppose I could do something like
myObject.CssClass += " MyClass";
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Jan 12, 2011
I have a gridview which successfully binds to the database and gets all data. Now I have added a link button in one of the coloumns which does this:
GridViewRow grow = gvInbox.SelectedRow;
DataRow dr = ((DataTable)this.gvInbox.DataSource).Rows[grow.DataItemIndex];
int MessageId = (int)dr["MessageId"];
Response.Write(MessageId);
Basically I am trying to get the datarow and get a MessageID. However the second line from above gives me outofbound exception.
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Feb 1, 2010
I have a div element which has these css attributes :
HTML
<div class="messageContainer"></div>
CSS
.messageContainer {
margin-left: 2px;
background-color: #F7F5F2;
width: 100%;
min-height: 50px;
border: solid 1px silver;
padding-left: 5px;
margin-top: 3px;
}
When putting this html portion inside the div element : do the things respectively:
<ol>
<li>
Create button control
</li>
<li>
Assign it to the main user
</li>
<li>
Let me know what happened
</li>
</ol>
This is how it shows on the page: (Please look at the numbers) So the question is why this is happening?Why are the numbers are appearing outside of the div element. I used:
.messageContainer ol
{
list-style-position:inside;
margin-left:5px;
}
which worked just fine but now this is what happened.
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Jan 7, 2011
I have this:
<dockmenu>
<photo image="images/4runner-sr5.jpg" url="www.example.com" target="_blank"><![CDATA[4Runner]]></photo>
<photo image="images/4runner.jpg" url="www.example.com" target="_blank"><![CDATA[4Runner<br>Dock Beautiful]]></photo>
</dockmenu>
And I need to add one more element to the xml with different information using(C# and ASP.net)
so it will look like this:
<dockmenu>
<photo image="images/4runner-sr5.jpg" url="www.example.com" target="_blank"><![CDATA[4Runner]]></photo>
<photo image="images/4runner.jpg" url="www.example.com" target="_blank"><![CDATA[4Runner<br>Dock Beautiful]]></photo>
<photo image="images/new.jpg" url="www.new.com" target="_blank"><![CDATA[New]]></photo>
</dockmenu>
How do I do this?
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Aug 25, 2010
I have a problem with ASPxPageControl with EnableCallbacks property set to true.
In this case when I have a couple of grids on each tab javascript doesnt see ClientInstanceNames of grids which are on different then active pages.
I want to have possibility that on the change active page if current page hax index (for example 3) then refresh grid which is on this page.
I think that once I used javascript like that:
if (document.getElementById("MyClientInstanceName") != null){
MyClientInstanceName.Refresh();
}
otherwise there was selecting in callback so it worked great.
But now it doesnt work cause there is always null even when that tab was opened.
I use ClientID which is very ugly and long but it makes it all work for now.
Is there any other way to findout if clientInstanceName is available from javascript ?
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May 5, 2010
I have a label that is associated with a css class "applycolor", which is applied the first time it is displayed on a page.
[Code]....
defined in css,
label.applycolor {
width: 200px;
color: red;
}
Based upon the selection of a radio button, i would like to change its color back to normal. I tried to use
lblHomeAdd.Style.Remove("applycolor"); but this did not give me a solution.
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Jul 21, 2010
I've seen the <script type="text/C#> with intellisense.
If it is possible to script client side scripts in C#, some infomation or reference on how to do it. For example, do I need using statements, is the script compiled on the server.. etc.
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Dec 23, 2010
I have a web form with usual elements (first name, last name, etc). The Postback URL is a different website altogether as the form is intented to post lead information to another website.
The site that accepts the lead is expecting First Name to come over as "FName", and Last Name to come over as "LName". Is there any way I can set the ID of a textbox to "txtFName", but submit it over the wire as "FName"? I tried changing the name attribute, but at runtime it sets the name = id.
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Oct 30, 2010
How to add a class before a given element?
The code doesn't add a class but instead add a new element. [:(]
[Code]....
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May 4, 2010
I have a few scattered <p> elements on the aspx page which I am grouping together using a class like so - <p class="instructions" runat="server">
In my code behind, using C# I want to hide these elements, using something like
instructions.Visible = false;
However I realize I can only do this in codebehind if I use ID but this will result in invalid HTML/CSS Selector since you can't have multiple ID's with the same ID name...
Alternatively is there another way to group the controls if not by class?
EDIT: I can't use JavaScript, so the selection must be done in C# codebehind/ASP.NET
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