Platform drop-down selection setting item

Add drop-down list options for drop-down selection parts and set whether option content is read-only.

In Event Management--Load Events for the form, set drop-down options for drop-down selection parts:

Then add the following code to the event management--control--drop-down selection value change event: (Get key value of drop-down option, display value)

Operation effect:

Note: Through the application of this example, we find that if you use the drop-down selection component method "Setting Item" packaged in the platform to set the option content for the drop-down selection component, then the key value of the drop-down option is: 0... n-1, the display value is: the corresponding value of the setting.

Description: If you use the drop-down selection component method "Set Data Source" packaged in the platform to set the option content for the drop-down selection component, the key value of the drop-down option is: Column 1 queried by SQL statement, and the display value is: Column 2 queried by SQL statement.

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