Question

I have written an ASP.NET server control.

View state works perfectly, but when I’m trying to get a value of a control on my custom control with its public instant method, it brings me an exception that there are not control with that ID.

Answer 1

If you want to get the values from your custom control, you have to register your controls in OnInit event.

//Register your controls
protected override void OnInit(EventArgs e) {
        var controlName = (Type)LoadControl("~/path.ascx");
        controlName.ID = "YOU_MUST_SET_AN_ID";
        placeholder.Controls.Add(controlName);
}


//get your controls (add the following in any method you like)
var controlNameCtrl = (Type)placeholder.FindControl("CONTROLID");
var propertyValue = controlNameCtrl.PropertyName;