Dropdown Box Query

Ignition
1

I have placed dropdown box in ignition dashboard in which I have form 3 column named group 1, group 2, group 3, now I want that when I select one then subcomponent will get display in form of in another drop downlist so how can I do that?

2

First, add a custom property to the second dropdown called masterDataset
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Add columns for value, and every other category
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Populate it with all of the data.
When completed, it should look like this:
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Finally, right click on the first dropdown, and select scripting:
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Put a script into the propertyChange event handler that loops through and pulls out the data you want based upon the selection in the first dropdown:

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# Check if the event's property name matches 'selectedLabel'.
# This prevents the script from firing when any of the other properties change 
if event.propertyName == 'selectedLabel':

	# Fetch the 'masterDataset' from the custom property on 'Dropdown 2'
	masterData = event.source.parent.getComponent('Dropdown 2').masterDataset
	
	# Define the column headers for the new dataset.
	headers = ['Value', 'Label']
	
	# Create a sublist by looping through each row of the masterData.
	# For each row, we fetch 'value' and 'Type' columns. Only include rows where the 'Drink' column matches the new value of the event.
	sublist = [[masterData.getValueAt(row, 'value'), masterData.getValueAt(row, 'Type')]
				for row in range(masterData.rowCount)
				if masterData.getValueAt(row, 'Drink') == event.newValue]
	# Convert the created sublist into a dataset with the previously defined headers.
	subData = system.dataset.toDataSet(headers, sublist)
	
	# Update the 'data' property of the 'Dropdown 2' component with the newly created dataset.
	event.source.parent.getComponent('Dropdown 2').data = subData

Result:
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