dont know if you ever managed to figure this one out or not.
Not sure if you knew this, but you cannot modify the Sales Order on the view form, or at least shouldn't be trying to do so.
Using either of the Enter/Amend Sales Order forms will allow you to do so.
What is potentially happening, is that the properties that the controls are bound to are not updating the UI after your code has run.
You can simply force this to happen using the following
Fetching the underlying bound object
public Sage.Accounting.SOP.SOPOrderReturn SOPOrderReturn
{
get
{
//Loop over the boundobjects collection
//check if the bound object is of the type we want - e.g. SOPOrderReturn
//if correct type, return this object
Sage.Common.Collections.BoundObjectCollection boundObjects = this.form.BoundObjects;
if (boundObjects != null)
{
foreach (object boundObject in boundObjects)
{
if (boundObject is Sage.Accounting.SOP.SOPOrderReturn)
{
this._sopOrderReturn = boundObject as Sage.Accounting.SOP.SOPOrderReturn;
break;
}
}
}
return this._sopOrderReturn;
}
}
Fetch the correct underlying form type that the amendable form is, suspending the databinding,
perform your changes,
resuming the databinding
Sage.MMS.SOP.MaintainOrderForm maintainOrderForm = this.form.UnderlyingControl as Sage.MMS.SOP.MaintainOrderForm;
maintainOrderForm.BindingContext[this.SOPOrderReturn].SuspendBinding();
this.SOPOrderReturn.PaymentWithOrder = true;
this.SOPOrderReturn.PaymentType = Sage.Accounting.SOP.SOPOrderPaymentTypeEnum.EnumSOPOrderPaymentTypeFull;
maintainOrderForm.BindingContext[this.SOPOrderReturn].ResumeBinding();
should do the trick.