topic Re: Update TextBox on a form in a QueuedTask in ArcGIS Pro SDK Questions

Update TextBox on a form in a QueuedTask

BrianBulla — Fri, 21 May 2021 17:32:39 GMT

Hi,

Is it possible to update Windows Form objects (ie. TextBox, ComboBox, etc) while in a QueuedTask? I keep getting the "wrong thread" exception error.

What I am doing is working with a selected feature, to populate fields on a form. Is there a recommended way of dealing with this?

Thanks,

Re: Update TextBox on a form in a QueuedTask

Wolf — Fri, 21 May 2021 17:54:32 GMT

Hi Brian,

You have to make any updates to the UI from the UI thread. There is a sample utility function in this community sample called RunOnUIThread that allows you to switch threads and run an Action on the UI thread. arcgis-pro-sdk-community-samples/BookmarkDockpaneViewModel.cs at 44183d0d5a9bc5da6fb8b9229211cc707dd2b874 · Esri/arcgis-pro-sdk-community-samples (github.com)

Depending on your use case you can also use the Dispatcher class as shown here:

arcgis-pro-sdk-community-samples/Module1.cs at 44183d0d5a9bc5da6fb8b9229211cc707dd2b874 · Esri/arcgis-pro-sdk-community-samples (github.com)

You mentioned 'Windows Form' objects which would exclude the use of synchronization patterns that are exclusive to WPF like BindingOperations.EnableCollectionSynchronization

Re: Update TextBox on a form in a QueuedTask

BrianBulla — Fri, 21 May 2021 19:00:43 GMT

Thanks Wolfgang. I'll check out those links.