Clear fields based on drop-down values in PowerApps

Clear current selection from drop down when another drop down value changes

1) Parent drop-down is States
2) Child drop-down is City

We can hide and show the City drop-down based on States Value changes
NOTE: Please use your DataCardValues and lv_dpclear is local variable

• Select City data card and go to the Advanced properties for DataCard
• Look for the Visible property and write the below code

If(DataCardValue3.Selected.Value="VA",true,false)

• For clearing the City dropdown selected value based state changes.

• Select the State drop-down (first drop-down) and go to Advanced
• use the below code in OnChange 

UpdateContext({lv_dpclear: true}); UpdateContext({lv_dpclear: false}) 

• In the Reset property of the second dropdown(City), add the below code

      lv_dpclear



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Clearing text box and Date Control values based on dropdown selection:


Add below code in drop-down OnChange 

Reset(DataCardValue47)

Reset((DataCardValue28)


Note: DataCardValue47  is Text box DataCard value.


          DataCardValue28 is Data picker DataCard value

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Set Radio button default values:

If(SharePointForm1.Mode=FormMode.New,Blank(),ThisItem.Internal_x0020_or_x0020_External.Value)

OR

Set the Default property of the 1.1_Last Inspection Reviewed? Radio button to following:

If(
    EditForm1.Mode=FormMode.New,
    Blank(),
    ThisItem.1.1_Last Inspection Reviewed?
)

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Set Date Picker value to today date

If(SharePointForm1.Mode=FormMode.New,Today(),Parent.Default)
 or
If(SharePointForm1.Mode=FormMode.New,Today(),ThisItem.DateOfInteraction)