How to clear URL Param()?

[ericonline]

Hello,

Question:

- How do I remove a Param from the URL from within the application?

The Param() docs are scant and haven't been updated in 5 years (!). Need community help on this one!

Scenario:

- OnVisible of App:

If(
    !IsBlank(Param("testNumber")),
    Set(varTestNumber, Param("testNumber"));
    Navigate(scrSearch)
)

- OnVisible of scrSearch:

If(
    IsBlank(Param("testNumber")),
        Set(varTestNumber, Blank()),
    Set(varTestNumber, Param("testNumber"));
    Select(icnSearch)
)

 - This executes a search and the URL works very well as a "tap-out" from a legacy system. 

Problem:

- If user clicks the "Back" or "Cancel" button and wishes to perform a manual search, `Param("testNumber")` remains in the URL

- This causes a loop where the user cannot perform a new search due to `varTestNumber` being set automatically based on the URL

Thanks

[chsanche]

Hi @ericonline 

I don't think this is going to be possible. PowerApps has limited functionality to modify the browser's resources, for example, PowerApps is able to launch a new tab but is not able to close a tab, I tried to search for this information in our documentation but got into the same URL you are indicating.

Unfortunately, I don't think we have this feature available for now.

Best Regards,

--

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[ericonline · Accepted solution]

Thanks for the reply @chsanche . I found a work around. Its a not the most eloquent, but works: 

Solution:

- OnSelect of "Cancel" or "Back" button (after user has come into the app via Parameterized URL):

If(
    IsBlank(
        Param("testNumber")
    ),
        Navigate(scrStart, Fade),
        Launch("https://apps.powerapps.com/play/<yourAppIdHere>?tenantId=<yourTenantIdHere>&hidenavbar=true")
)

- Translates to:

  - IF the user came into this screen using the traditional workflow, just navigate them back to the start screen 

  - ELSE relaunch the app without the Param() in the URL

Hope this helps others!