# Expression tag e dropdown

**URL:** <https://forum.inductiveautomation.com/t/expression-tag-e-dropdown/19750>\
**Category:** Ignition\
**Created:** [September 20, 2018, 5:44pm UTC](https://forum.inductiveautomation.com/t/expression-tag-e-dropdown/19750 "2018-09-20T17:44:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Giuseppe.mollica](https://avatars.discourse-cdn.com/v4/letter/g/2acd7d/32.png) [@Giuseppe.mollica](https://forum.inductiveautomation.com/u/Giuseppe.mollica)\
**Post date:** [September 20, 2018, 5:44pm UTC](https://forum.inductiveautomation.com/t/expression-tag-e-dropdown/19750/1 "2018-09-20T17:44:22Z")

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Good evening,  
It is possible to create an exprescion tag which, as a value, shows the selected text in a dropdown box  
thank you

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<div class="post-metadata">

**Author:** ![Stevenson.Yuan](https://avatars.discourse-cdn.com/v4/letter/s/ac91a4/32.png) [@Stevenson.Yuan](https://forum.inductiveautomation.com/u/Stevenson.Yuan)\
**Post date:** [September 20, 2018, 8:00pm UTC](https://forum.inductiveautomation.com/t/expression-tag-e-dropdown/19750/2 "2018-09-20T20:00:44Z")

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I think a little bit of context could help here…

Are you thinking of using a gateway tag or client tag?

A tag could be bound to the dropdown’s selectedStringValue property. This would show the last selected value, set by any of the clients.

Using a gateway tag means that every client would be competing to set the value.

Client tags are server independent and could be used to cache a selection during the client’s runtime.

But you wouldn’t necessarily have an expression tag (specifically because if the window is no longer open, and how you need to handle multi-client scenarios).