Fields retain previous value even when default is blank

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Posted on by senna

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I have a combo box in a canvas app called cb_Name, it gets populated from a collection <myCollection.Name>

The same field is used to display Name when the user is viewing a record and when a new records is being created.

What is happening at the moment is a user is opening the screen to view a records, the cb_Name field is populated with the value from the collection they have selected.

The user exits the screen and the Set(myCollection,Blank()) is triggered, clearing the values from Name.

If the user opens up the same screen again but this time to create a new records, the fields should all be blank as myCollection is blank, but the cb_Name field will be populated with the value that was last in myCollection.Name

The DefaultSelectedItems of the Name field is myCollection.Name

How can I ensure the combo box will only display what is in myCollection.Name, so blank when the value is blank.

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Sam_Fawzi 722 Super User 2025 Season 2 on at

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Fields retain previous value even when default is blank

Hey @senna,

you need Reset the combo box when switching to “New” mode

like this
Set(myCollection, Blank()); Reset(cb_Name);

and Make sure DefaultSelectedItems returns Blank when there is no value

something like this for the defaultSelectedITem property

If( IsBlank(myCollection) || IsBlank(myCollection.Name), Blank(), LookUp( cb_Name.Items, Name = myCollection.Name // or the appropriate field in your Items ) )

hope that will help you with your question.

Cheers,

Sam

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