ASP.NET how to Render a control to HTML?

I have any ASP.NET control. I want the HTML string how to do I get the HTML string of the control?


Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

This appears to work.

public string RenderControlToHtml(Control ControlToRender)
    System.Text.StringBuilder sb = new System.Text.StringBuilder();
    System.IO.StringWriter stWriter = new System.IO.StringWriter(sb);
    System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(stWriter);
    return sb.ToString();

Method 2

Accepted answer by David Basarab will not work if control is not part of the page. a7drew‘s answer seems unnecessary complex – no need in Context or Server.Execute.

private string RenderControl()
    var sb = new System.Text.StringBuilder();
    using (var stWriter = new System.IO.StringWriter(sb))
    using (var htmlWriter = new HtmlTextWriter(stWriter))
        var p = new Page();
        var ctrl = (YourControl)p.LoadControl("~/controls/building blocks/YourControl.ascx");
        ctrl.Visible = true;

        // do your own init logic if needed

        return sb.ToString();

Method 3

If your control is a web user control, this is how you can get to the HTML it emits from another page or handler:

public void GetHtmlFromMySweetControl(HttpContext context)
    HttpRequest httpRequest = context.Request;
    HttpResponse httpResponse = context.Response;

    string foo = httpRequest["foo"];

    Page pageHolder = new Page();
    string path = "~/usercontrols/MySweetControl.ascx";
    MySweetControl ctrl = (MySweetControl)pageHolder.LoadControl(path);

    StringWriter sw = new StringWriter();
    context.Server.Execute(pageHolder, sw, false);

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

0 0 votes
Article Rating
Notify of

Inline Feedbacks
View all comments
Would love your thoughts, please comment.x