Can I dynamically add HTML within a div tag from C# on load event?

Question

Mind you, I am using master pages, but can I locate a div within the page and throw some html in there? Thanks.

Answer 1

Use asp:Panel for that. It translates into a div.

Answer 2

You can add a div with runat="server" to the page:

<div runat="server" id="myDiv">
</div>

and then set its InnerHtml property from the code-behind:

myDiv.InnerHtml = "your html here";

If you want to modify the DIV's contents on the client side, then you can use javascript code similar to this:

<script type="text/javascript">
    Sys.Application.add_load(MyLoad);
    function MyLoad(sender) {
     $get('<%= div.ClientID %>').innerHTML += " - text added on client";
    }
</script>

Answer 3

You could reference controls inside the master page this way:

void Page_Load()
{
    ContentPlaceHolder cph;
    Literal lit;

    cph = (ContentPlaceHolder)Master.FindControl("ContentPlaceHolder1");

    if (cph != null) {
        lit = (Literal) cph.FindControl("Literal1");
        if (lit != null) {
            lit.Text = "Some <b>HTML</b>";
        }
    }

}

In this example you have to put a Literal control in your ContentPlaceholder.

Answer 4

You want to put code in the master page code behind that inserts HTML into the contents of a page that is using that master page?

I would not search for the control via FindControl as this is a fragile solution that could easily be broken if the name of the control changed.

Your best bet is to declare an event in the master page that any child page could handle. The event could pass the HTML as an EventArg.