Binding data to Combobox in custom activity designer

Question

I have a custom activity, with a single in argument which is a string. However, rather than allow the designer to enter an arbitrary string, I want the designer to be presen

Answer 1

Normally, I would write the activity with a property rather than an InArgument. This simplifies the scenario:

(here ValidOptions is some Collection property on your ActivityDesigner class. MyStringProperty is some public get/set/ property on the underlying activity such as:

public string MyStringProperty { get; set; }

)

The problem you will have if you add InArgument to the mix is that the string values from the combo box cannot be directly assigned to a ModelItem expecting InArgument. This is fixable using a custom IValueConverter in your binding.