geoff
3/1/2004 8:16:00 PM
Never mind. I figured it out.
private void Page_Load(object sender, System.EventArgs e)
{
string controlType = "System.Web.UI.WebControls.TextBox, System.Web,
Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a";
Type t = Type.GetType(controlType);
Control h = (Control)Activator.CreateInstance(t);
PlaceHolder1.Controls.Add(h);
}
--geoff
geoff@basicframe.com (basicframe) wrote in message news:<238dd61.0403010542.5bf7a24b@posting.google.com>...
> Anyone know how to create a asp.net WebControl from a string value?
> I'm pulling string values (eg. System.Web.UI.WebControls.TextBox) from
> an XML file and would like to dynamically create a TextBox, then add
> to Page.
>
> I've tried creating with Activator.CreateInstance, but always returns
> an "Specified cast is not valid" exception.
>
> I've tried several variations of the following:
> Sample #1-----------------
>
> private void Page_Load(object sender, System.EventArgs e)
> {
> string controlName = "System.Web.UI.WebControls.TextBox";
> Object o = Activator.CreateInstanceFrom(@"c:\windows\assembly\gac\system.web\1.0.3300.0__b03f5f7f11d50a3a\system.web.dll",controlName);
> Control c = (Control)o;
> Page.Controls.Add(c);
> }
>
> returns Exception = "Specified cast is not valid"
>
>
> Sample #2-----------------
>
> private void Page_Load(object sender, System.EventArgs e)
> {
> string controlName = "System.Web.UI.WebControls.TextBox";
> Type t = Type.GetType(controlName);
> Object o = Activator.CreateInstance(t);
> Control c = (Control)o;
> Page.Controls.Add(c);
> }
>
> returns Exception = "Value cannot be null. Parameter name: type"
>
>
> I'm stabbing in the dark here, so any help is very much appreciated.
>
> .geoff