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Editorial Team
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Asked: 2026-05-15T07:05:52+00:00

How do I go about rendering an asp.net control on a web page from

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How do I go about rendering an asp.net control on a web page from a string in code behind?

For example, say I have the aspx page below:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="nrm.FRGPproposal.Questionnaire1" %>

<!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">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        //want to render a text box here
    </div>
    </form>
</body>
</html>

What could I do in my Page_Load event to render a TextBox into the div?

protected void Page_Load(object sender, EventArgs e)
{
    //what do i do here to render a TextBox in the div from the aspx page?
}
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1 Answer

  1. Editorial Team

    Caution there may be compilation problems here. But basically add a placeholder control to the code in front as such.
    <%@ Page Language=”C#” AutoEventWireup=”true” CodeBehind=”Default.aspx.cs” Inherits=”nrm.FRGPproposal.Questionnaire1″ %>

    <!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">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:placeholder id="placeHolder" runat="server"/>
    </div>
    </form>
</body>
</html>

    Then create a TextBox in the code behind programmatically. You will need to include System.Web.UI in order to get the textbox.
    Then Add the control to the controls collection on the placeHolder. Set whatever properties you like on the text box programmatically

    protected void Page_Load(object sender, EventArgs e)
{
    TextBox tb = new TextBox();
    placeHolder.Controls.Add(tb); //tb is referring to the name that you want to name your element. in this example given was TextBox. so the name of text box is tb. 

}
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