As I mentioned elsewhere, I use MyAssembly.CreateInstance() instead of Activator.CreateInstance(), but it doesn't really matter. You say the call to the parameter-less constructor works, so I guess you've got that part figured out ok.

As far as passing the parameters, what you've got looks ok ... are you sure the parameters are in the correct order and are of the correct type? Something like the Enum might trip you up (depending on whether your Form expects an Enum value to be passed to it or simply an int).

It really shouldn't matter, but just for the heck of it, have you tried creating the object[] first and using that in the call instead? Like this:

object[] parms = new object[3];
object[0] = JK.Payment.Enums.TxnType.Sale;
object[1] = salesBO.SaleNo;
object[2] = salesBO.Total;
loForm = (PaymentForm) Activator.CreateInstance(Type.GetType("JK.Payment.UI.Windows.Forms.PaymentForm"), parms);

~~Bonnie




>Hi,
>I have problem to pass parameter to form constructor using Activator.CreateInstance().
>
>I have code below,
>
>Hi,
>I am facing the same problem.
>
>I tried the code below.
>

>
>            //Workign OK
>            Payment.UI.Windows.Forms.PaymentForm loForm = new PaymentForm(new object[]
>                { JK.Payment.Enums.TxnType.Sale, salesBO.SaleNo, salesBO.Total });
>
>            loForm.ShowDialog();
>
>            loForm.Dispose();
>
>            //Workign OK
>            loForm = (PaymentForm)Activator.CreateInstance(Type.GetType("JK.Payment.UI.Windows.Forms.PaymentForm"));
>
>            loForm.ShowDialog();
>
>            loForm.Dispose();
>
>            //NOT Workign OK
>            loForm = (PaymentForm) Activator.CreateInstance(Type.GetType("JK.Payment.UI.Windows.Forms.PaymentForm"),
>                                                            new object[]
>                                                                {
>                                                                    JK.Payment.Enums.TxnType.Sale, salesBO.SaleNo,
>                                                                    salesBO.Total
>                                                                });
>
>            loForm.ShowDialog();
>            loForm.Dispose();
>

>
>Please advice
>
>Thank you