Multiline Textbox - "Code Blocks Are Not Supported In This Context"
Jan 26, 2011
I have a multiline (> 50 lines) textbox containing plain text. I want to add either a session variable to the text in this box. In asp I would have done it by putting in <% %> code blocks but in .net I am getting the following error: "Code blocks are not supported in this context". I assume therefore that this would need doing in code behind.
Is there a quicker way than putting all the text from the textbox in a string in code-behind and then adding the variable on like this? I would like to keep the text in my aspx page if possible.
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Similar Messages:
Nov 21, 2013
We are using Infragistics' WebDataGrid, but this question probably applies to all other grids. I am new to Infragistics (actually have worked with their controls years ago, but feeling new regardless!) and this application as well. So I'm looking to its existing code as a model.
I want to have a column called Tobacco with a Y or N value depending on if Smoker is true/false.
Ideally, the whole thing would be something like this:
Code:
<ig:BoundDataField Header-Text="TobaccoUse" Key="Smoker">
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.Smoker") != DBNull.Value ? (DataBinder.Eval(Container, "DataItem.Smoker") == true ? "Y" : "N") : "N"%>
</ItemTemplate>
Because I want to check for a null first and when I know I don't have one, test the value.
But since I am getting an error on that I am trying to start simple and build it up. I am getting the same error on this:
Code:
<ig:BoundDataField Header-Text="TobaccoUse" Key="Smoker">
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.Smoker") == true ? "Y" : "N"%>
</ItemTemplate>
The error is: Code blocks are not supported in this context.
Why is this a code block and should it be something else? What is my context?
This is an example of a line that works:
Code:
<ig:TemplateDataField Header-Text="DOB" Key="DOB">
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.DOB") != DBNull.Value ? Convert.ToDateTime(DataBinder.Eval(Container, "DataItem.DOB")).ToShortDateString() : ""%>
</ItemTemplate>
</ig:TemplateDataField>
I don't know if I need a Convert.ToBoolean in there somewhere but I tried and it didn't work and at this point I am just guessing which will take a long time for me to get it right.
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Sep 28, 2010
where we use <%@ %> <%= %> <%# %> etc.
what else asp tags can be added in asp.net web pages?
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Feb 3, 2011
I am writing a dynamic control that I want to pass in something along the lines of the following:
HyperLink myLink = new HyperLink();
myLink.NavigateUrl = "/Home.aspx?id=<%= DataBinder.Eval("PageId") %>";
myLink.Text = "The link";
myControl.Controls.Add(myLink);
I want to be able to resolve the myLink.NavigateUrl at run-time according to the context that myControl puts the control into in the end (this is not a WebControl and therefore adding to the collection of controls doesn't output to page).
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May 3, 2010
When changing the textbox's text mode to multiline the textbox becomes resizable during runtime. I can't seem to find the property to disable this, does anyone know how I can resolve this issue?
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Mar 24, 2011
Is it possible to do something like this in regular ASP.NET (or something similar):
<ul>
<% foreach (var item in Model) { %>
<li id="<%: item.Id %>">
blah blah
</li>
<% } %>
</ul>
I need to do a gird, but I want to control how the html table is output.
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Jan 22, 2011
I'm updating my old .aspx views with the new Razore view engine. I have a bunch of places where I have code like this:
<span class="vote-up<%= puzzle.UserVote == VoteType.Up ? "-selected" : "" %>">Vote Up</span>
Ideally I'd like to do this:
<span class="vote-up@{puzzle.UserVote == VoteType.Up ? "-selected" : ""}">Vote Up</span>
However there's two problems here:
vote-up@{puzzle.UserVote .... is not treating the @ symbol as a start of a code block @puzzle.UserVote == VoteType.Up looks at the first part @puzzle.UserVote as if it's supposed to render the value of the variable.
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Feb 1, 2010
I'm building an asp.net app using themes, and I've assigned a theme to the app using the web config.
I have a bookmark icon that I want to use for my page and it is located in the themes directory, but I am having trouble referencing the themes location from a link tag in my header.
First I tried putting a code block inside the link tags href element, which did not work. Instead all it did was html encode the <% characters and output it directly to the browser:
<link rel="shortcut icon" href="/App_Themes/<%=Page.Theme %>/images/bookmark.ico" type="image/x-icon" runat="server"/>
I am able to put a code block inside an element in an hr tag though, so I don't know why it won't work in a link tag:
<hr test="<%=Page.Theme %>"/>
Then I tried doing a Response.Write inside the head tag, but I got an error saying the Controls collection cannot be modified because the control contains code blocks:
<% Response.Write("<link rel="shortcut icon" href="/App_Themes/" + Page.Theme + "/images/bookmark.ico" type="image/x-icon"/>"); %>
I also tried it just with a string literal, and got the same error:
<%= "<link rel="shortcut icon" href="/App_Themes/" + Page.StyleSheetTheme + "/images/bookmark.ico" type="image/x-icon"/>" %>
Is there any way to reference something from the themes directory inside the link tag?
I'm trying to do this in both an ASP.NET 2 and an ASP.NET 2 MVC app.
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Mar 27, 2011
i saw few of solutions for this exception (like putting it in place holder, or replace the <% to <# ...etc) , but i don't get the idea about it, i mean what is the controls collection? and why it can't be modified if the added control contains code blocks?
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Aug 11, 2010
I recently put some code <% %> code blocks in my Master Page. Note I've read of the "fix" for either moving things out of <head> or using <%# %> but neither of them work well for my application.
Now the weird thing is that I only get this error on one page of mine. All the other pages seem to work fine, so what actually causes this error? There is nothing I can think of that is unique about this page. It uses the script manager as does other working pages and there is just nothing extraordinary about this page. It does have quite a few custom controls on it, so hunting down what is different in this page is more difficult than usual.
So what actually causes the Controls collection cannot be modified because the control contains code blocks exception?
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Dec 18, 2012
Error: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)
I have the following in my master file to load a dynamic seasonal background image:
HTML Code:
<style type="text/css">
body
{
background-image:url("<%=backgroundImage%>");
background-position: top center;
}
</style>
It works fine on most of my pages, but on one it throws the above error.
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May 7, 2015
I have web.confing file when adding tag page for set theme
After running project i have this error:
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
<pages theme="Theme" styleSheetTheme="Theme" clientIDMode="AutoID" />
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Apr 27, 2016
I am getting http exception in of the method of class file (search.aspx.vb) like "The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)",
I have tried placing Java script function in the body of Master page from header, whereas I just removed the Java script tag and its contents in search.aspx (as of its not required now). Still getting exception.
I also know that if we have something like this <%= in Java script function we need to replace with <%#. But I don’t have this kind of code in any function.
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Feb 19, 2011
i am filling a textbox from the database.
from the database i am getting data in html format.
but it showing the tags with data. I want my textbox to make support with HTML.
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Jun 9, 2012
I want use meta tag in my page that read keyword from database
I set this code in my product.aspx page
protected void Page_Load(object sender, EventArgs e) {
SqlCommand _cmd = new SqlCommand("select Keyword1 + ',' + Keyword2 + ',' +Keyword3 from House_info where BehCode=1115", _cn);
_cn.Open();
SqlDataReader _dr = _cmd.ExecuteReader();
while (_dr.Read())
[Code] ....
It worked correctly and show my keywords from database and show it in my product.aspx metatag
I have two other page
index.aspx and store.aspx in index.aspx i have 1button and 1 TextBox when user type their BEHCODE(columns name in users table) in TextBox it go to store.aspx page and show that users information on store.aspx
Now i want set meta tag in store.aspx page and i want fill store.aspx meta tag from my users table in data base
This is index.aspx
protected void ImageButton3_Click(object sender, ImageClickEventArgs e) {
string data = Server.UrlEncode(txtNumeric.Text);
SqlCommand _cmd = new SqlCommand("traidname", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cmd.Parameters.Add("@BehCode", data);
[Code] ....
Here when i run website this error occur
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
In this line
this.Page.Header.Controls.Add(htmlMeta);
I use this code too
<script type="text/javascript">
$("input[id$=btnButton]").live("click", function () {
return confirm("Do you want to submit?");
});
</script>
But it didn't worked this problem just happen here when i used meta tag code in other page it worked correctly . Why this happen?
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Jan 24, 2012
The code on one of my aspx pages is giving me this error:
I'm getting this on the code behind for export to excel on one of my pages.
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).It is referring to this line Me.GridView1.Parent.Controls.Add(frm)
I have this code in the aspx page. I am using two gridviews. I need to have this on the page any way I can fix the code so I can use that export to excel you created?
<% If(Session("PendingClaims"))%>then display gridview1<%Else%>
Then display gridview2<% End If %>
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May 6, 2010
i need to let the user to enter numbers only in the textboxand the code should be work in IE FF and major browsers
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Sep 23, 2010
I was working on an asp.net 3.5 website and used ajaxtoolkit in it and when I use it in my page it was registered as below
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>
and it was working well even After I upgraded my wevbsite to .net version 4 but when I started a new website from scratch in vs2010 using .net4 when I use ajax toolkit in this new site it is registered as folowing
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
and when I run the page I get the error The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>) I don't Know what is the reason for this. I noticed another thing. in my old website I was using thckbox script by using the files common.js, jquery-1.3.2.js,jquery.thickbox.js and puting them in a Javascript folder ad then registering them in Script manager as following
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Scripts>
<asp:ScriptReference Path="~/Javascript/jquery-1.3.2.js" />
<asp:ScriptReference Path="~/Javascript/jquery.thickbox.js" />
<asp:ScriptReference Path="~/Javascript/common.js" />
</Scripts>
</asp:ScriptManager>
this was working well also but in my new site the jquery file version was jquery-1.4.1.js but also I added the old version f the javascripts files in the built in Scripts folder that is created by default b the new site and followed the same way in registering them in the script managerchange the JavaScript folder to the built in folder Scripts
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Scripts>
<asp:ScriptReference Path="~/Scripts/jquery-1.3.2.js" />
<asp:ScriptReference Path="~/Scripts/jquery.thickbox.js" />
<asp:ScriptReference Path="~/Scripts/common.js" />
</Scripts>
</asp:ScriptManager>
but this doesn't work also in the new site I think that there is something diffirent in the 2 case which leads to this change in performance I wish your support and advice about how to solve this matter
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Feb 17, 2010
I have a regular expression
ValidationExpression="^((?!script).)*$"
this works good when I am using it for a normal(singleline) textbox.But when i use this with Multiline textbox it does not work. I am using RegularExpressionValidator control of asp.net for the same.Would there be any way I can make it compatible with Multiline textbox?
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Jan 12, 2010
I am trying to add line Break in Multiline textbox when i am displaying data.
This is how i m doing but its not showing line break. I have tried using "/r/n" as well.
txtlog.Text = txtlog.Text & " Creating Objects...<br/>"
txtlog.Text = txtlog.Text & " Objects Created Successfully...<br/>"
I want the output should be like below :
Creating Objects...
Objects Created Successfully...
But it showing like without line break.
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Jul 13, 2010
This is for a multiline textbox on an asp.net site. I can use either a html control or a an asp.net control but what I want to do is somehow recognize which line is being clicked - preferably server-side so that it works without javascript but a jquery solution would be fine as well. After the line is clicked I need to take the text from said line, and return an output after a xml lookup.
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Apr 1, 2010
I have a multiline textbox (textbox1) and was wandering how to maintain the paragraph tags when I insert my text into a sql database.
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Mar 4, 2010
I have a webform with a multiline textbox. In the code behind file I create a StringCollection & add some text. How can I assign the StringCollection to the multiline textbox?
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Dec 17, 2010
I'm using VS 2010 and .net 4. I'm trying to figure out how to make a textbox be multiline and set the rows in codebehind.
I'm trying to figure it out for a user control that i'm working on. So in the properties passed through the to user control it will set the textbox to be a multiline or not.
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Sep 29, 2010
How do I retain the formatting visual studio retains, in C#.NET/VB.NET, when I paste it into a textbox?
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