If there is a "" value within the array data related to the Dropdown and ComboBox control, please take a try with the following workaround: Note: By default, if there is no "" value within the array data related to the Dropdown control, the Dropdown control would be populated with available values, in other words, the first item within the array data would be selected by default in the Dropdown control, so you could not use the IsBlank() function to detect if the selected option is blank. IsEmpty( ComboBox1.SelectedItems), /* <- ComboBox1 represents the ComboBox control */
Set the DisplayMode property of the Button2 control to following: If( IsBlank( ), /* <- Dropdown1 represents the Dropdown control */ Set the DisplayModeproperty of the Button1 control to following: If( On your side, I assume that there is no "" value within the array data related to the Dropdown and ComboBox control, if you want to check if a Dropdown value or a ComboBox value is Blank, please take a try with the following workaround: The "" ( empty string) is a string text value, but there is no character within it. The following formula would always return false: "" = Blank() /* <- Please type this formula within a Label control to test it.*/ In addition, the "" ( empty string) is not equal to Blank. IsBlank() function and IsEmpty() function More details about IsBlank() function and IsEmpty() function, please check the following article: The IsEmpty() function is used to check if a table contains any records, in other words, the IsEmpty() function is used to detect if there is no records within a Table.
The IsBlank()function is used to check if a value is Blank. Hi on your issue that you provided, I think you have some misunderstanding with IsBlank() function and IsEmpty() function.
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