How To Access HTML Control From Code Behind

Apr 28, 2010

my application runs on the client side. I have to access a display on the asp page via javascript. I have the following code working properly:

ClientSript.RegisterStartupScript(this.GetType(), "allMessages", "<script>document.forms[0].tbDisplay.value='Messages'; </script>");

tbDisplay is a "text box" asp:textbox control. I need to replace de 'Messages' for avariable. so instead of printing "Messages" all the time, I can change the information on the variable prior to display the message. how to change 'Messages' to a variable.


Web Forms :: How To Access HTML Control Value From Server-side Code

Mar 20, 2010

I have to access my html control and get its value from my server-side code. Is there anybody who could suggest how I could do it?

My html control is very simple: <input type=text>

But the thing is: I can't make it <input type=text runat=server> cause in this case my jquery functionality (datepicker) does not work.

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Web Forms :: How To Access Html Checkbox From Code Behind

Jan 19, 2011

<input id="Checkbox2" type="checkbox"
onclick="fnHideSection()" />

iam using it to show/ hide a section but on post back the item being unchecked again how solve without using the asp checkbox

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Web Forms :: How To Use An HTML Button To Access C# Code In A Script

Jun 9, 2010

How do I use an HTML button to access C# code in a script?

The code I have looks like it should work, but it doesn't.


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Web Forms :: How To Access The HTML Control Values In Form Object, If Runat="server", Is Not Present In The HTML Controls

Mar 29, 2011

How to access the HTML control values in form object, if runat="server", is not present in the HTML controls.

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Web Forms :: How To Access Html Control From User Control In CodeBehind

Dec 31, 2009

I have a setup like this...


- ContentPlaceHolder
- HTML Control I want to Access
- User Control (that I want to access the HTML Control in the Code Behind)

I wasn't sure how to ask this question with the correct lingo, so I think a diagram works well.

I have tried multiple things, from find control to Request.Form to HttpContext, but I can't seem to get anything of them correct.

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Setting Value In Html Control In Code Behind Without Making Server Control?

Feb 24, 2010

Setting value in html control in code behind without making server control

<input type="text" name="txt" />
<%--Pleas note I don't want put runat=server here to get the control in code behind--%>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

Code behind

protected void Page_Load(object sender, EventArgs e)
if (!Page.IsPostBack)
//If I want to initlize some value in input, how can I set here
protected void Button1_Click(object sender, EventArgs e)
Request["txt"] // Here I am getting the value of input

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Web Forms :: Access Html Hidden Input Field Embedded From Server Side Code?

Jan 26, 2010

I want to integrate paypal inside my shopping cart. For that it requires a html form to be embeded inside .aspx page with the action to paypal and method is post. Inside that form there are some hidden input filed. I want to assign one of those hidden field's value from server side code so i need to access that filed from server side. But how? Here is my form:

<form action="[URL] method="post" id="PaypalForm">
<input type="hidden" name="cmd" value="_cart"/>
<input type="hidden" name="upload" value="1"/>
<input type="hidden" name="business" value="[URL]
<input type="hidden" name="item_name_1" value="Item Name 1" />
<input type="hidden" name="amount_1"/>
<input type="submit" value="PayPal" />

I want to access amount_1 filed.

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Web Forms :: How To Access A Control In The Code Behind Even Though The Control Is Not A Server Control

Jun 3, 2010

I have several checkbox controls on my web form that are not server controls (runat="server") How can I access these controls form my C# code? Can this be done with document.GetelementById from the server side using C#? Or some other technique?

I am not allowed to make these server controls (runat=server) because of a requirement.

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Access Html Client Side Control In .cs Page?

Aug 16, 2009

I have an image who's source I want to set programmatically. Note this is an html control and it is a client side control. I plan on setting the path in the .cs file. But I'm a bit confused about how to access the control in the first place. Page.controls("id").source = path? But that doesn't work. I worked with html before and I know I can do Document.GetelementByID("ID").src = ... but can I do that in the .cs file?

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How To Access To An HTML Control Runat Server From JavaScript

Jan 9, 2011

I have the following code:


How to access to an HTML control runat server from JavaScript

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How To Control On HTML Elements By Using C# Code

Jan 26, 2010

How can I control on HTML elements by using C# code in pages.

For example:

I want to change the content of span tag or td tag when load page... that's mean write code c# in Default.aspx.cs for example to change Span content

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C# - Get The HTML Rendered By Control In Code Behind?

Nov 12, 2010

I want to call the corresponding html inside a Panel in code behind. How can I do that?

I have this

<asp:Panel ID="MyPanel" runat="server">
// other controls and html stuffs here.

I want to get the HTML equivalent of MyPanel and all of its contents in my code behind say in PageLoad or some methods.

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C# - Turning HTML Div Code Into A Control?

Jan 18, 2010

I have bunch of HTML code I am using to make rounded edge boxes on my controls. Is there a way to take this code and turn it into some kind of control or something so I do not have to keep pasting 10 lines of HTML code around everything I do?

<div id="BottomBody">
<div class="box1024" >
<div class="content1024">[code]....

One additional thing to note, the number HTML tags used inside the inner most DIV will change depending on where I use it in my site. So in some cases I will only have 1 tag and 1 tag but in other cases I could have 1 tag, 1 tag, 3 tags, and a HTML table. How can I make that work?

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.net - Call HTML Control In Code Behind?

Jan 23, 2010

How can I get gridview HTML textbox value in .aspx.cs code?? E.g. : <input id="Frequency" name="customerName" type="text" style="width: 44px" />If i use the bellow code ,Then i can get the value on selectedIndex event.

string n = String.Format("{0}", Request.QueryString['customerName']);

I want to use bellow syntax.TextBox_Label1 = (TextBox)e.Row.FindControl("Frequency"); i don't want to user the runat="server" on HTML control .From Gridview i need to call a popup,Popup return a value ,I use the bellow code on javascript to do that

window.opener.document.getElementById("customerName").value = val;

In my gridview .if i put the runat="server" then return value not set ,So i need to remove the runat="server".It also not work if i put the Asp:TextBox on Grid.Help me to Return popup value on gridview Asp:TextBox

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Web Forms :: How To Call HTML Control Via Code Behind ?

Sep 10, 2009

I already searched on Google and found that I do it just only add runat="server" However, the solution is OK if the HTML tags exist since page loading. In my case, my web page will generate textBox on client side only if an user inputs some data as example

Some of code as follows.


How can I call HTML control via code behind.

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Control Access The Variable Of Code?

Oct 14, 2009

I am wondering how can a control access the code behind. For example, in a asp:HyperLink control, I want to put a URL as


However, I prefer to store the parameter name in a class with a public static string property to make sure the name of parameter consistent globally like

public static readonly string Constants.SomePara="somePara";

So, is that possible to write the HyperLink control like this

<asp:HyperLink ID="link" runat="Server" NavigationUrl="xxxx.aspx?<%= Constants.SomePara%>">=something</asp:HyperLink>

As I know <%= %> is used to refer server value on client side, what is the symbol to refer a variable in a server control?

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C# - User Control Access From Code Behind

Dec 22, 2010

I have a user control called adminMenu and I use it in my index.aspx and all is fine, but I need to access a MenuItem in adminMenu and need to change NavigateUrl on the MenuItem. Tried this code with no luck:

MenuItem MaintenanceReports = this.adminMenu.FindItem("MaintenanceReports");

Not sure if I should be accessing adminMenu properties from controls code behind, but when I try from controls code behind was not able to access it either.

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Web Forms :: Cannot Access Control Id From Code Behind (c#)

Feb 18, 2010

I have a .aspx page that inherits from a class (Hmp.Web.Lib.HmpWebPage which actually inherits System.Web.UI.Page) . The code behind for my page starts like this.

FnmMessagesEdit : Hmp.Web.Lib.HmpWebPage

and the markup is

Inherits="HMP.Web.features.FnmMessagesEdit" %>

My problem is that I have a textbox with the following markup ,but cannot access the textbox from codebehind


Also I am using Telerik controls on my page .Do you think that it is the problem?

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Code Behind Doesn't Recognize Control ID's On HTML Page

Feb 9, 2010

I had a website with a few controls with id like:

btnSave and tbAmount

I renamed one of my controls and when I tried to use it in the code behind I get the following error.

Error 5 Name 'tbAmount' is not declared.

I was messing around trying to add new controlls rather than rename, but nothing seems to work.

And now, none of my controlls that were added to the page are recognized in the code behind. They all have the error:

Error 5 Name 'tbAmount' is not declared.


Error 3 Name 'hfNoteId' is either not declared or not in the current

scope. E:NoteTenderNoteTenderMembersManageNote.aspx.vb 33 71 NoteTender

Even my button click event handler gives me the following error:

Error 2 Handles clause requires a WithEvents variable defined in the containing type or one of its base types. E:NoteTenderNoteTenderMembersManageNote.aspx.vb 27 91 NoteTender

I have verified that my inherits is using the correct namespace and class name.

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AJAX :: Cannot Access Modalpoupextender Control-id In Code-behind

Dec 22, 2009

I cannot access my modalpopupextender control-id in my code-behind. I have the runat server tag also.

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Access :: How To Convert The C# Code To Access Sql To C# Code To Access Microsoft Access

Aug 12, 2010

I have a code to link to sql can anyone give me the same code for microsoft access....

int videoID = Convert.ToInt32(Request.QueryString["ID"]);
SqlConnection conn = new SqlConnection("server=WEBDESIGN-PC;database=Credentials;uid=sa;pwd=Azeem;");
SqlCommand cmd = new SqlCommand("SELECT * FROM videopath WHERE videoID=" + videoID, conn);
SqlDataReader dtr = cmd.ExecuteReader();
FlashVideo1.VideoURL = Convert.ToString(dtr["Filepath"]);
Label1.Text = Convert.ToString(dtr["Filename"]);
catch (Exception ex)
Label1.Text = Convert.ToString(ex);

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Web Forms :: Can't Reference An Html Element From Code Behind In A User Control

Feb 2, 2010

Here is the contents of my test.ascx file:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="test.ascx.cs" Inherits="UserControls_test" %>
<p id="XXX">aaa</p>

and here is the contents of my test.ascx.cs file:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControls_test : System.Web.UI.UserControl
protected void Page_Load(object sender, EventArgs e)
this.XXX.InnerHtml = "BBB";

I get an error when I refer to the id, "XXX" (underlined above) in code behind which reads: 'UserControls_test' does not contain a definition for 'XXX' and no extension method 'XXX' accepting a first argument of type 'UserControls_test' could be found (are you missing a using directive or an assembly reference?)

I have tried XXX.InnerHtml and I have tried this.XXX.InnerHtml and get same problem.

How do I successfully refer to ID'ed HTML elements in code behind?

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Inject Code Into Masterpage / Html Head From A User Control?

Jan 10, 2010

I am struggling with something that I guess should be standard practice really. I have a number of user controls that use some JQuery plugins. I do not really want to link to the extra CSS and JS files from my main masterpage as this would cause extra load to the user the first time they hit the site, (admittedly it would only be the once), so I was just putting them links into the top of the user control. Then I looked at my source HTML, not nice! Even worse for controls that repeat multiple times on a page.

So I was thinking is there a way of injecting them into the Head of the page when they are needed from the User Control. For that matter is there a way of doing it to the footer for JS stuff?

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Web Forms :: How To Access A User Control From .vb Code Behind File

May 14, 2010

I'm trying to access a user control from my .vb code behind file. I am actually trying to access a button on that user control page.

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Web Forms :: Can't Access All Of User Control Types In Code

Jun 27, 2010

I have an 3.5 WebSite application where I have a bunch of UserControls.

In some scenarios I have a reference of type Control (System.Web.UI.Control) that I need to cast to a specific User Control type (to access public properties and methods of the User Control).

The User Control classes are all declared in "the global scope", i.e. not within a namespace. However, for some reason, only some of my User Controls is possible to type in a code file and show up in intellisense and some just wont. In one scenario I could write the cast in code anyway and the site would build (but the UserControl type name did not shift in to the ordinary class name color (light green, you know) in VS text editor), but when running the page I still get the error message about missing using directive or a reference...

If I use the VS 2010 "Navigate to" feature (Ctrl+,) and search for a type I usually get one hit for the Type/Class name and another for the actual file. When searching on my User Control class names I only get the file hits, no class representation. This even goes for those User Control types I actually can access in code.

I've tried to compare the User Control classes that work and doesn't work, but I can't find any difference, they are all declared as public partial.

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How To Access A User Control's Parent Form's Controls Inside The User Control's Code Behind

Jun 11, 2010

I have to access the parent form's controls inside an event handler method on my user control's code behind.

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Forms Data Controls :: Access Datalist Control From Code Behind?

Jul 22, 2010

I want to access my checkbox in code behind. I have my checkbox in my aspx file like this:


And i'm trying to set the checkbox visible=false like this but it's not working. Error message: Object reference not set to an instance of an object.


This is just one thing i want to do with my controls in my datalist, so i don't want to in my aspx file like this:

<asp:CheckBox ID="CheckBox1" runat="server" Visible='<%# if(Eval("isFolder")="1","false","true") %>' />

Because i have quite a lot of things i would like to do in the code behind when i'm getting my files..

Is it possible somehow to achieve this without having to put servercode in my aspx file?

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How To Access Referenced Table From ASPX In-line Code (datagridview Control)

Apr 25, 2010

i am trying to bind data to a datagridview control on an ASPX webpage and am using something like this..

<asp:TemplateField HeaderText="MyField">
<%# DataBinder.Eval(Container.DataItem, "MyField") %>

the problem i am having is that the data for the 'MyField' field is actually an integer that is a reference to a string value in another sql table.

Does anyone know how i can reformat my code line above to show the string value instead of the int value?

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Forms Data Controls :: Access Row Values Of A Gridview Control In Code Behind?

Nov 12, 2009

I am using a gridview inside of listview and my code looks as below:

<ListView Name="listview1" Width="400" Margin="10" ItemsSource="{Binding Path=table1}" IsSynchronizedWithCurrentItem="True"


I want to access the values in a row when user clicks on the corresponding row on the grid in code behind. My event handler is "gridrowclickhandler". I wanted to pass row values as parameters to that function so I can use them in my code behind.

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C# - Extend Control (ASCX) And Access Base Markup File From Subclass Code?

Jan 29, 2010

I'm building form validation controls for our C# ASP application. The bulk of the work is handled by a BaseValidator control (subclassing System.Web.UI.UserControl), which also has the markup for the validation output. This is then extended by subcontrols like PasswordValidator, that provides the Validate method and any extra fields needed by that validator control.

(The end goal is to have controls like <uc1:PasswordValidator ControlId="txtPassword" /> which we can plop into any form with minimum duplication.)

However, PasswordValidator.ascx.cs cannot access the form elements defined in BaseValidator.ascx; the only way I've found to do so is to duplicate the markup in each subcontrol's *.ascx file. How can I extend BaseValidator.ascx.cs and access BaseValidator.ascx's markup in the subclass?

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Access :: Store The Ajax HTML Editor Text In An MS Access Database?

Jan 2, 2010

I am using ajax html editor to write a text. I can view it without having problem but I am incapeble of storing it in a Ms Access database. which type do I need to use for this? I tried memo and OleObject type and both didn't work. I used the blow code for that.

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Access The Html Button In Aspx.cs Page?if Access How

Jan 7, 2010

i have a doubt if i write html button in source code, how can i access in aspx.cs,

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Convert Html In A Textbox / Need To Enter Html Code Into (like < Strong>?

Jan 19, 2011

I have a textbox which I need to enter html code into (like < strong> or < em> for example).The trouble is this is causing an error writing this back to the database. A potentially dangerous Request.Form value was detected from the client (tbVOther="< strong>testIs there a way around this without turning off the request validation setting?

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Web Forms :: Can Access The Calender Control "SelectedDate" Property In Code

Jun 22, 2010

i have a celender cotrol in a FormView control. how i can access the calender control "SelectedDate" property in my code.

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Web Forms :: Use Code For Posting Transaction Info To Paypal Rather Then HTML Form Code?

May 28, 2007

I want to create a "buy it now" paypal button and post transaction info to the paypal server using code rather then the common HTML form code provided by paypal. I want the flexibility that VB.NET code gives me

For example to create a paypal "buy it now" button where an item is added to the paypal cart and transaction info posted directly to the paypal server you use the following HTML code. The user clicks on the button and is automatically redirected to the paypal shopping basket where they can purchase the product. This adds the item name, the shipping costs, the type of currency ect for an item the customer wishes to purchase to the shopping cart.

<form action=[URL]>
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="">
<input type="text" name="quantity" size="2" value="1" />
<input type="hidden" name="item_name" value="Casio watch">
<input type="hidden" name="item_number" value="1">
<input type="hidden" name="amount" value="10.00">
<input type="hidden" name="shipping" value="3.20" >
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="currency_code" value="GBP">
<input type="hidden" name="lc" value="GB">
<input type="hidden" name="bn" value="PP-BuyNowBF">
<input type="image" src=[URL]
border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
<img alt="" border="0" src=[URL] width="1" height="1">

How do I post transaction information and redirect the user to the paypal server/site using code instead.

<input type="hidden" name="shipping" value="<%myvalue%>" >

I know I can use the above code but I want the whole form to be created and posted using code rather then HTML. Not just single variables. The form must utilize the same names ( Item_name, amount, currency_code etc). I know the answer is simple but I have not yet worked it out.

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Web Forms :: Call A Code Behind Function Form Html Source Code?

Mar 3, 2010

I want to call a function present in code behind from front page (html : source code)

i want to use like this:

Source code

<a href='<%# linkAlpha("B").ToString()) %>' title="B" id="B_List" runat = "server">B</a>

Code Behind

protected string linkAlpha(string value)
// /market-research/<%#Eval("customname")%>/
string str = "";
if (Request.Url.DnsSafeHost == "localhost")
{ // /market-reports/<%# Eval("customname")%>/
str = "Alpha_Category.aspx?q=" + value.ToString().Trim();
// Response.Redirect("Alpha_Category.aspx?q=" + value.ToString().Trim());
// str = "/market-reports/" + value.ToString().Trim() + "/";
str = "/Alpha_Category.aspx?q=" + value.ToString().Trim();
return str;

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Web Forms :: How To Create A New HTML Control Which Contain Multiple HTML Control

Sep 20, 2010

I am realizing a table with multiple rows for a Sharepoint webpart.

In this project, I would like to have a new html control which contain a LinkHtml in one column and another label in another column.

Essentially this html control would be a row used for my html table.

At the moment i am doing a row like this in the main class :


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Web Forms :: How To Generate HTML Code By Commands From The Code Behind Page

Dec 30, 2010

how to generate HTML code from the code behind?

I would like to build a form that generate an html code inside a for loop.

I will let the user enter the photo name and No. of photos

Then I will generate an HTML code like this:

<a href="" target="_blank"> <img src="" alt="" width="345" height="247" /> </a> <br /> <a href="" target="_blank">
<img src="" alt="" width="345" height="247" /> </a> <br /> <a href="" target="_blank"> <img src="" alt=""
width="345" height="247" /> </a> <br />

depending on the No. of the photos the code will be duplicated in the loop

Then I will display the result of the loop in label or in a textarea to let the user copy it any where

The problem is that while compiling my code it considers the HTML code as a part of the behind file and gives errors on the single quote, the double quote and on the parentheses

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Access :: Find Primary Key In Ms Access Table Using Code?

Feb 11, 2009

I need to find primary key field in ms access table using code (

i am using oledb connection

So far i'm using MS access but i would apperciate , if any one can show the same for Oracle,MySql & SQL Server

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