# \#filedropcombo

**URL:** https://clarionhub.com/tag/filedropcombo/215.md

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## [FileDropCombo how not to Add when Blank and Auto Number is Zero](https://clarionhub.com/t/filedropcombo-how-not-to-add-when-blank-and-auto-number-is-zero/6470)

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**Author:** [@tgulden](https://clarionhub.com/u/tgulden)\
**Replies:** 3\
**Last updated:** [August 10, 2023, 5:53pm UTC](https://clarionhub.com/t/filedropcombo-how-not-to-add-when-blank-and-auto-number-is-zero/6470 "2023-08-10T17:53:59Z")

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Hi everyone I have an update Form to register projects. In the Form, I have a FileDropCombo for contact persons based on the projects customer. The FileDropCombo automatically adds new contact persons if you write a new…

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## [Linking RelationTree and FileDropCombo](https://clarionhub.com/t/linking-relationtree-and-filedropcombo/6455)

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**Author:** [@StaceyRobinson](https://clarionhub.com/u/StaceyRobinson)\
**Replies:** 1\
**Last updated:** [August 3, 2023, 10:01am UTC](https://clarionhub.com/t/linking-relationtree-and-filedropcombo/6455 "2023-08-03T10:01:32Z")

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Hi all, Was just wondering if there was a way to link a FileDropCombo and a RelationTree, to have the RelTree respond to the record selected in the FDC. My dictionary relationships are all set as they should be, but I'v…