Mink Machine

Dynamic type creation in ASP.NET

ASP.NET web controls are usually littered in the markup in design time, but sometimes there is a need to dynamically add controls to an ASP.NET web page in runtime.

Its quite easy to generate a server control from a string. The built-in types are stored in the GAC and requires a fully qualified strong name, such as:

“System.Web.UI.WebControls.Button, System.Web, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a”;

This information can be found at c:\windows\assembly where you can view the properties of the assemblies. Once you got the strong name, the control can be created and eventually added to the controls collection of another control.

string s = “System.Web.UI.WebControls.Button, System.Web,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a”;
Type t = Type.GetType(s);
Control c = (Control)Activator.CreateInstance(t);
f.Controls.Add(c);

Happy coding!

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