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Building and Configuring Workflows
Basic Activities
Data Access Activities
These activities are used for passing information and data between workflows and activities.
Call Web Method Activity
The Call Web Method activity allows you to call an external web service method that contains parameters defined as part of the workflow.

Workflow Products Documentation

Building and Configuring Workflows
- Workflow Design Basics
- Workflow Foundations
- Task Management for Administrators
- Task Configuration
- Task Step Configuration
- Global Subprocesses
- Basic Activities
  - Activities Used to Create Workflows
    Activities comprise the main building blocks or steps that perform the actions in a subprocess or workflow.
  - Third-party Activities
    Workflow can utilize third-party activities that are compatible with Microsoft Windows Workflow Foundation.
  - Predefined User Activities
    A user activity defines part of a user-defined process in a workflow process step. For a workflow to run, all user activities must be valid (contain no errors) and enabled (active).
  - Data Access Activities
    These activities are used for passing information and data between workflows and activities.
    - Call Method Activity
      The Call Method activity allows you to use a call method from a service provider to access information in other areas of the application.
    - Call Web Method Activity
      The Call Web Method activity allows you to call an external web service method that contains parameters defined as part of the workflow.
    - Code Activity
      The Code activity allows you to write custom logic; therefore, you can augment the functionality of a workflow to meet your needs.
    - Index Activity
      An Index activity is used with any collection of data to look up a value at a specified index on the collection.
    - Read Data Items Activity
      The Read Data Items activity allows a subprocess to access data items outside of the workflow. This activity reads data from the data items defined at the workflow or subprocess level to make them available to other activities.
    - Write Activity
      The Write activity performs a set of writes to workflow variables. The source of each write can be an expression, a bind, or a user-defined absolute value.
    - Write Data Items Activity
      The Write Data Items activity allows a subprocess or step to access data items outside of the workflow. The Write Data Items activity writes data to data items at the workflow or subprocess level.
  - Workflow Control Activities
    These activities are used for creating changes in a workflow, such as starting or stopping activities, during run time.
  - Message Queue Activities
    These activities are used for working with a messaging queue in order to co-ordinate work between workflows and activities.
  - Flow Control Activities
    These activities are used to create multiple execution layers within workflow logic.
  - Event-based Activities
    These activities are used when you require workflow logic to start an event during run time.
  - Keyword Activities
    You can use keywords to replace text in work instructions and email subjects and bodies. This text is replaced with keyword values in a workflow at run time.
  - Operator Activities
    These activities are used by operators when a workflow is running the Task List.
  - eSOP Activities
    These activities are used when working with the eSOP Editor.
- Schedules
- Faults
- Test Workflows
- Debug Workflows
- Track Data
- Web Services Service Provider
- Legacy Workflow Web Service
- Categories
- Completion Codes
- Actuals
- REST APIs

Call Web Method Activity

The Call Web Method activity allows you to call an external web service method that contains parameters defined as part of the workflow.

Important: The Call Web Method that was provided in earlier versions of Workflow is still available. You can continue to use it for your legacy web services; however, it is recommended that for all new web services configurations, you should use the Web Services Service Provider to add and configure web service definitions.

Two types of web services are supported:

WCF (Windows Communication Foundation) web service, where the endpoint or interface name is clearly defined in the WSDL (Web Services Description Language) file.
Conventional web services, where no endpoint or interface is defined in the WSDL file.

Web Method Details

The following table describes the web method details required to configure the Call Web Method activity:

Attribute	Value	Description
WSDL URL	User-defined	Specifies the URL of the WSDL file that contains the web service you want to call. Note: The URL must end with ?WSDL.
Interface/Endpoint	User-defined alphanumeric string (A-Z, a-z, 0-9)	Specifies the interface or endpoint the web service is monitoring.
Method Name	User-defined alphanumeric string (A-Z, a-z, 0-9)	Specifies the name of the web method being called.

Input and Output Parameters

After you configure the web method details, configure the input parameters. When you assign an input value, you can bind it to a variable to ensure that the parameter receives the data of the correct data type.

The output parameter is the return value of the call method; therefore, you do not need to enter a value.

Important: Null values are not supported in a sequence of input parameters. For example, if three input parameters are required, the first and/or second parameters cannot be null. In this case, you can either use InputParam1 through InputParam3 for your input parameters, or you can use the Expression Editor to enter the numeral 0 or an empty string into the parameter field that you want to leave empty.