How to Dynamically Load User Controls

[abehm]

I have a couple placeholders in which I want to dynamically load user controls into a multi-pageview based on db data.

The database returns the filename of the user control (i.e. UserControl.asc x), and a value (tdr.Page) to determine which placeholder it should load into.
I then use Server.MapPath to get the path to the user control but when it comes down to Load the control I keep getting the error "filepath\userc ontrol.ascx is not a valid virtual path". Can anyone please help me solve this problem?

here is the code i am using:
[CODE="c"]
string component = tdr.UserControl ;
string componentPath = Server.MapPath( component);

switch (tdr.Page)
{
case "Page1":
{
PlaceHolder ph = (PlaceHolder)Pa geView1.FindCon trol("Page1Plac eHolder");
ph.Controls.Add (Page.LoadContr ol(componentPat h)); //where I get the error
break;
}
case "Page2":
{
PlaceHolder ph = (PlaceHolder)Pa geView2.FindCon trol("Page2Plac eHolder");
ph.Controls.Add (Page.LoadContr ol(componentPat h)); //error
break;
}
}

[/CODE]