When updating a SharePoint ComboBox in a Canvas App, Can't set new value to a PowerApps Variable

[MattMolkoski]

Hi,

Here's my scenario. I am building a form in PowerApps. This form is based in Microsoft SharePoint.

The way the form works is that the form has a drop-down list. This drop-down list is a look-up to another SharePoint list.

When the user selects the value (It is a text string) in the drop-down list, I would like to add the item they have selected to a variable in PowerApps, so I can then pass this text to a look-up table.

However, I can not seem to get the variable to populate. Here's what I'm doing:

In the OnChange element for the drop-down list, I've typed the following:

UpdateContext ({LikelihoodEntry:ThisItem.Likelihood.Value});

However, no matter what I change the Likelihood drop-down box to, the variable does not change.

Could really use some help!

[CapstoneAdmin · Accepted solution]

In your OnChange code, instead of "ThisItem..." Type "Self.Selected.Likelihood" and see if it works.

[MattMolkoski]

That worked! Thank you very much for your help. Do you know WHY that has to be used instead?

[CapstoneAdmin]

I know when you're using a dropdown that it doesn't know what to do with "ThisItem." It's looking for Dropdown.Selected. or Self.Selected. to know what value you're looking for. I don't know anything more than that haha.

Glad to help!