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PowerApps cascading dropdown list with blank value by default

April 15, 2022

I have two dropdowns, Dropdown 1 and Dropdown 2. Data source for First dropdown is table A, and data source for second dropdown is table B and filters the values based on the value of dropdown 1.

To set the default value of dropdown 2 is

  1. Navigate to Dropdown 1 OnSelect property, add the following:

Collect(ClearCollect(Collection2,{Result:””}),Sort(Distinct(Filter(SharepointTable,
ColumnName1=dropdown1.Selected.Value),ColumnName2).Result,Result))
2. Navigate to Dropdown 2 items property and then add collection name:

Collection2

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