elsa-workflows / elsa-core

A .NET workflows library
https://v3.elsaworkflows.io/
MIT License
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[CHORE] How does the IF activity in Elsa 3.1.3 designer define a condition that evaluates to true or false? #5705

Closed shxylgithub closed 4 months ago

shxylgithub commented 4 months ago

How does the IF activity in Elsa 3.1.3 designer define a condition that evaluates to true or false?

glime-ai[bot] commented 4 months ago

The If activity in Elsa 3.1.3 designer allows you to define a condition that evaluates to true or false by setting the Condition property. This property expects an expression that, when evaluated, results in a boolean value (true or false). Based on the result of this condition, the workflow will proceed with the Then branch if the condition is true, or the Else branch if the condition is false.

In the designer interface, you may not see explicit properties for Then and Else due to a known issue where these properties are not visible. However, the If activity shows two buttons in the Activity Display which represent sub-flowcharts for the Then and Else branches. By clicking on the Then or Else button, you can enter a sub-flowchart where you can implement your logic by dragging and dropping new activities.

Here is an example of how you might define an If activity programmatically with a simple condition:

var workflow = new Workflow
{
    Root = new If
    {
        Condition = new Input<bool>(true), // This is where you define the condition
        Then = new WriteLine("Hello World!"),
        Else = new WriteLine("Goodbye cruel world!")
    }
};

In this example, the Condition is set to new Input<bool>(true), which always evaluates to true, so the Then branch will always be executed. In a real-world scenario, you would replace true with an actual expression that determines the condition dynamically at runtime.

For more information on how to use the If activity and define conditions, you can refer to the Elsa documentation and the GitHub issue discussions that address the visibility issue in the designer interface.

This comment was generated by Glime.

sfmskywalker commented 4 months ago

Duplicate of https://github.com/elsa-workflows/elsa-core/issues/5710

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