How to call a RFC of a remote system from an ABAP webdynpro component

Question

Dear Experts,
I am a newbie in ABAP Webdynpro.
I am working on a requirement where I have a webdynpro component on ECC system.I need to call a RFC located on CRM system from my webdynpro component on the ECC system.
How do I do that ?? Please help.
Regards,
Mamai.

Answer 1

Calling RFC from some other system is same as local except the difference is that you have to give destination name while calling.
And the regarding the method of calling it depends on your FM.
if it is big RFC with complex structure, you can create the service call for it with destination given as RFC desitination.
if it is simple straight forward RFC you can directly call it.
for creating RFC service call call use this method
1. Starting the Wizard
To start the wizard, position the cursor on the Web Dynpro component to be edited in the object list at the left margin of the
workbench window. Open its context menu and choose the entry Create->Service Call. The wizard is started and leads you
through the creation process.
Press Continue.
2. Choice of Controller
On the second dialog window of the wizard, you can choose whether the service call is to be embedded in an existing
controller or whether a new controller is to be created for this purpose. Service calls can only always be embedded in
global controllers u2013 that is, in the component controller or in additionally created custom controllers. It is not possible, to
embed service calls in view controllers.
a. Select radio button Use Existent Controller
b. Do not change the default entry for component: <CC name>
c. Enter for controller COMPONENTCONTROLLER
d. Press Continue.
3. Service Type and Service Selection
a. You now select, which service type should be used for this service call. Select radio button Function Module. Fill the
destination here. Press Continue.
b. Select the service: for Function Module enter <RFC name>. Press Continue.
4. The Required Methods and Context Elements
On the two subsequent dialog windows, default values are listed for giving names to the context nodes and attributes
required by the service call as well as to the required methods. The proposed names are based on the names of the
embedded service, but you can change them as required. However, heed the respective notes in the corresponding dialog
box.
a. Adapt Context: Select from Nodes/Attributes . Press Continue.
b. Specify Method Name: leave all entries as provided: Component:  Controller: COMPONENTCONTROLLER Method: EXCUTE_ Press Continue.
5. Completing the Choice
When you have confirmed the last dialog box, the generation is triggered. Afterwards you now have the required methods
and contexts at your disposal for using them within your Web Dynpro component.
or if you want to call directly the use the call statement with destination