Developer Activities

Last updated Oct 23, 2025

Create and Deserialize a JSON Array

The follwing example explains how to use activities such as Invoke Code and Deserialize Json Array to create a JSON array, deserialize it, and provide the list of extracted tokens. You can find these activities in the UiPath.WebAPI.Activities package.

This is how the automation process can be built:

Open Studio and create a new Process.
Drag a Sequence container in the Workflow Designer.

Create the following variables:

Variable Name	Variable Type	Default Value
`jsonAsString`	String
`jsonAsArray`	JArray

Add an Invoke Code activity inside the Sequence.

Select the Edit Code button and add the following code in the opened window:
```
Dim obj As ArrayList = New ArrayList()
obj.Add("Starcraft")
obj.Add("DOTA 2")
obj.Add("FarCry")
Out = JsonConvert.SerializeObject(obj)Dim obj As ArrayList = New ArrayList()
obj.Add("Starcraft")
obj.Add("DOTA 2")
obj.Add("FarCry")
Out = JsonConvert.SerializeObject(obj)
```
Once the code is added, select the OK button.

Select the Edit Arguments button and add the following argument:

Argument	Direction	Type	Value
`out`	Out	String	`jsonAsString`

Once finished, select the OK button like in the following GIF:

Add a Log Message activity after the Invoke Code activity.
- Add the expression "JSON As String: "+jsonAsString in the Message field.
Add a Deserialize Json Array activity after the Log Message activity.
- Add the variable jsonAsString in the Json String field.
- In the Properties panel, add the variable jsonAsArray in the JsonArray field.
Add a For Each activity after the Deserialize Json Array activity.
- Add the value token in the ForEach field.
- Add the variable jsonAsArray in the VB expression field.
- In the Properties panel, in the TypeArgument field, make sure you chose JValue.
Add a Log Message activity inside the Body of the For Each activity.
- Add the expression token.ToString in the Message field.
  
  This is how the workflow should look:
Run the process. A JSON array is created, deserialized as a String and provided as a list of extracted tokens.