Use fields dynamicly in webservices

Kaiawaia

Hello,

is it possible to access fields dynamicly? For example, I want to write a
value to a field. But I know which field this is only at runtime. I think for something like
this example shows:

account testContact = new Contact();
testAccount.Fields["City"] = "Berlin";

There is no "Fields" in Contact. That's only an example to show
what I mean. Is there any possiblility to use fields in this way?

Thanks,
Kai

kriki

You can use recordreference and fieldreference to do that.

ara3n

what Alain means is that you can use a publish a CU function and pass the parameters to update a field at runtime.
In that function you can use recordref and fieldref variables
You cannot do this through publishing pages as webservices.

Kaiawaia

Thanks for your replies. I will try with the references. That doesn't sound bad.

Ravi_Thakkar

Hello,

ara3n wrote:

what Alain means is that you can use a publish a CU function and pass the parameters to update a field at runtime.
In that function you can use recordref and fieldref variables
You cannot do this through publishing pages as webservices.

We can use the Codeunit logic as here specified. But, as the Microsoft Help on Web Services, transactions done using Codeunit functions will require Concurrency to be managed manually.
So, by using this method, Concurrency may become an issue.

ara3n

Concurrency is always an issue, and every developer who developers in NAV needs to manage it in code. If two people are modifying the same record, the user should get an error that somebody else has modified the record.

The bigger issue is managing transactions. Each call to a cu is a separate transaction. so you need to pay attention how transaction are committed and rolled back.

freddy.dk

If you want to assign fields dynamically from c# - you can use reflection to do that, in fact you can have web service reference be totally dynamic as explained here:

http://blogs.msdn.com/freddyk/archive/2009/04/27/dynamic-references-to-nav-page-web-services-in-c.aspx

If you just want to assign a field through reflection you would do:

PropertyInfo name = typeof(Customer).GetProperty("Name"); 
name.SetValue(customer, "new name", null);

I use that in a number of places - although the above code is just written from the top of my head, so there could be spelling mistakes.

Ravi_Thakkar

Hello Freddy,

Really it's a nice blog which you have posted.
Really it will be helpful to many. =D>

Thanks.

rajubodkhe28

hi Ravi,

If you did fields dynamicly in webservices. then can u help me to insert and update sales order dynamicaly using C#.net Reflection namespace. I am able to read sales orders but not able to insert and update. i am not able to setvalue of propertyinfo filed and pass that property filed to insert method or update method or the web service

if you have any code sample the kindly relply to this post

:?

Thanks and Regard
Raju