Disable a button based on a dropdown value & dropdown on change event

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Posted on by CH-11102210-0

Hello PowerApps Community

I'd like to disable a button based on the value of a dropdown. The dropdown (drpdProperty_Type)

is fed by a table PropertyTable

I have the button's DisplayMode property connected to a formula:

If(drpdProperty_Type.Selected.Property_Type = "Select......" || varOCPropType = "Select......", DisplayMode.Disabled,DisplayMode.Edit)
 
I have a variable varOCPropType connected to the On Change property of drpdProperty_Type as Set(varOCPropType,drpdProperty_Type.Selected.Property_Type) which evaluates to a text datatype, as does drpdProperty_Type.Selected.Property_Type = "Select......"
 
The drpdProperty_Type items are set to PropertyTable.
 
When I inspect button DisplayMode,  the IF expression still evaluates to false even when datatype text values are the same and I'm expecting the expression to be evaluated as true.
 
Could you please tell me why this doesn't evaluate to true?

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Power Apps Pro Dev & ISV

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WarrenBelz 153,079 Most Valuable Professional on at

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Hi CH-11102210-0

Firstly Modern Controls are still in Preview and really should not be used in Production apps. I notice that nothing is selected in your screenshot, so you would need to make the DefaultSelectedItems
{Value: "Select......"}

If you had a Classic Combo Box, you could set the InputTextPlaceHolder to "Select......" and then
If( Len(ComboBox.Selected.Property_Type) = 0, DisplayMode,Disabled, DisplayMode.Edit )

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CH-11102210-0 6 on at

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Thank you so much WarrenBelz!

As another test, I created another dropdown with more simple items:

["Item 1", "Item 2", "Item 3"] and the disabled mode evaluated as true.

This tells me my values from the dropdown are at fault, so I'll need to revisit those.

Len(ComboBox.Selected.Property_Type) = 0
makes perfect sense and seems much more robust. I will give it try! Cheers!

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