Read Only Error on incident form in plugin CRM 2011 Plugin - dynamics-crm

Question

I have a problem, which I'm really trying to figure out how I could best solve this. I have read various posts regarding this error and seems you can avoid this by using JavaScript by using:
Xrm.Page.getAttribute("name").setSubmitMode("always");
which doesn't work for me or inside the plugin. Now to my problem, I have an update plugin firing on my incident form, which updates some fields. However when I try to resolve the case or cancel it I get the error from my update plugin "The object cannot be updated because it is read-only" I have tried the following and would appreciate if somone could advice me what I'm doing wrong. My code for a plugin I'm registering as SetState on pre-operation against the incident form:
SetStateRequest setState = new SetStateRequest();
setState.EntityMoniker = new EntityReference();
setState.EntityMoniker.Id = incidentId; //Id which needs to be resolved/canceld
setState.EntityMoniker.Name = "statecode";
setState.EntityMoniker.LogicalName = "incident";
setState.State = new OptionSetValue();
setState.Status = new OptionSetValue();
SetStateResponse setStateResponse = (SetStateResponse)service.Execute(setState); }
On the state and status I'm quite confused to what value I have to set it to. I'm just getting an error when my incident is on Active and I'm trying to resolve and cancel the case. I would appreciate if someone could help me out here. Thanks in advance.

Answer 1

I think there are a few areas of confusion in your post...
Xrm.Page.getAttribute("name").setSubmitMode("always");
This is clientside code and will never have any bearing on the behaviour of your (serverside) plugin. It merely forces an attribute on the form to be submitted whether it has changed or not, during a save. If the record is in a read-only state, it will not change that fact.
I'm not at all clear what you are trying to acheive in your code. You mention that an update plugin is failing; you have posted code which would attempt to set the state of the incident to something (as #glosrob suggests, you are not providing any values in the OptionSetValue objects for State and Status so as you might already know, the code you have posted is invalid); you then state that you have registered your plugin on the SetState request. This means that it would fire if the user tries to set the state of the incident. Given that your code is itself trying to set the status of the incident, I'm not sure that it makes sense...
It sounds like what you want to do is, on update of an incident, set certain values. If the incident is in a read-only state, make it readable first, and then update the values. Do you then need to restore the state of the entity to it's former state? It sounds awkward and might perhaps suggest that there is a better way to meet your core requirement.
Maybe start with what you are trying to achieve and we can work from there :)

Answer 2

You should remove
setState.EntityMoniker.Name = "statecode";
from your code. This field Name has other purpose.
Also, you should add
setState.State.Value = 1;
setState.Status.Value = -1;