How do I hook up javascript to my CustomValidator control in .Net

Question

I have created a CustomValidator control

public class MyValidator :CustomValidator, IScriptControl {}

and also created the equivalent client sc

Answer 1

I've answered this myself as the other answer didn't quite achieve exactly what I wanted. I ended up using.

public class MyValidator : BaseValidator, IScriptControl  {

  protected override void AddAttributesToRender(HtmlTextWriter writer) {
    base.AddAttributesToRender(writer);
    Page.ClientScript.RegisterExpandoAttribute(this.ClientID, "evaluationfunction", "MyJavascriptFunction");
  }

}

Which will cause the control to generate:

MyValidator1.evaluationfunction = "MyJavascriptFunction";