Get the HTML rendered by ASP.NET control in Code behind

Question

Hi 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 asp.net controls and html stuffs here.
</asp:Panel>

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

Thanks.

Similar question here: stackoverflow.com/questions/58925/… — Tillito
– Tillito, Commented Mar 13, 2015 at 20:54

TheAlbear · Accepted Answer · 2013-12-05 15:55:47Z

37

Does RenderControl() not work?

Create an instance of your control and then call RenderControl() on it. Of course this implies that your panel is in a UserControl

example from comments:

StringBuilder sb = new StringBuilder(); 
StringWriter tw = new StringWriter(sb); 
HtmlTextWriter hw = new HtmlTextWriter(tw); 
ctrl.RenderControl(hw); 
var html = sb.ToString();

edited Dec 5, 2013 at 15:55

TheAlbear

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answered Nov 12, 2010 at 6:20

Shiv Kumar

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9 Comments

rob waminal Over a year ago

but the return type of RenderControl() is void.. I need to get the HTML equivalent as a string or an object.

Shiv Kumar Over a year ago

You pass in a TextWriter to the RenderControl() method. When the method returns, you have your html in the TextWriter

Shiv Kumar Over a year ago

StringBuilder sb = new StringBuilder(); StringWriter tw = new StringWriter(sb); HtmlTextWriter hw = new HtmlTextWriter(tw); ctrl.RenderControl(hw); var html = sb.ToString();

Shiv Kumar Over a year ago

Where ctrl is the instance of your UserControl

Snailer Over a year ago

This doesn't work if (for example) an element like a <div> was added to the panel dynamically via javascript. The dynamically added content doesn't appear in the result.

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Beingnin · Accepted Answer · 2017-10-26 13:22:08Z

4

@Shiv Kumar's answer is correct. However you don't need the StringBuilder for this.

StringWriter tw = new StringWriter(); 
HtmlTextWriter hw = new HtmlTextWriter(tw); 
ctrl.RenderControl(hw); 
var html = tw.ToString();

This also works

edited Oct 26, 2017 at 13:22

answered Oct 26, 2017 at 5:00

Beingnin

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