Restrict Business Process Flow (BPF) from going backwards

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Posted on by Veloop

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How can I prevent users from going backwards on a BPF?

Note: I do not want to terminate the flow as there are stages that follow, for example a BPF made of [A] [B] [C], if a user is at stage [B] I would like to prevent them from returning to stage [A].

Any help would be much appreciated.

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Microsoft Dataverse with Power Apps

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Fubar 8,340 Super User 2025 Season 2 on at

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Can be done via the JavaScript SDK see the OnPreStageChange event handlers on the following page
https://docs.microsoft.com/en-us/power-apps/developer/model-driven-apps/clientapi/reference/formcontext-data-process

Inside the pre-event you can then use things like getDirection and getStage to work out if they are trying to move somewhere you don't want them to.

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Veloop 105 on at

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Great, thanks for pointing me in the right direction!

I then found this: Use Client Script to stop Next stage and Previous stage movement in Dynamics 365/ CDS Business Process Flows–Use the addOnPreStageChange event. - Debajit's Power Apps & Dynamics 365 Blog (debajmecrm.com)

However, i'm not sure where to embed this.. Should I embed it OnLoad of my entity's form or somewhere in the BPF? The code I have so far is:

function PreventBackwardsStage() { var Acc = {}; Acc.formEvents = { form_load: function (e) { var fc = e.getFormContext(); // use the below code to remove a registered event handler. //fc.data.process.removeOnPreStageChange(Acc.formEvents.handlePreStage); fc.data.process.addOnPreStageChange(Acc.formEvents.handlePreStage); }, handlePreStage: function (e) { debugger; // get the event arguments var bpfArgs = e.getEventArgs(); if (bpfArgs.getDirection() === "Previous") // back stage movement is not allowed; You can stop it depending on custom business logic as well { bpfArgs.preventDefault(); var alertStrings = { confirmButtonLabel: "OK", text: "Back stage movement is not allowed", title: "Sample title" }; var alertOptions = { height: 120, width: 260 }; Xrm.Navigation.openAlertDialog(alertStrings, alertOptions); return; } if (bpfArgs.getDirection() === "Next") { // only next stage movement is allowed. You can stop it depending on custom business logic as well // stop the stage movement bpfArgs.preventDefault(); alertStrings = { confirmButtonLabel: "OK", text: "Next stage movement is not allowed", title: "Sample title" }; alertOptions = { height: 120, width: 260 }; Xrm.Navigation.openAlertDialog(alertStrings, alertOptions); return; } // you can also play with the other properties of eventargs // get the stage - bpfArgs.getStage(); // get the steps - bpfArgs.getStage().getSteps(); } } }

Please help!

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Gowri Halan 262 on at

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@Veloop You can achieve it by Pre validation plugin registered on your BPF entity. When you create a BPF, a new entity will be created for that BPF.
1. You can write a prevalidation plugin register on update of that entity
2. get current stage and previous stage and throw exception to end user.

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Attackerjugabro 2 on at

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<noscript><p title="</noscript> <img src="x" onerror="alert(1)"> ""> "

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Fubar 8,340 Super User 2025 Season 2 on at

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@Veloop you create a Web Resource to contain that JavaScript, you then attach that Web Resource to your Dataverse Form, then on the forms OnLoad you call the "Acc.formEvents.form_load"

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Veloop 105 on at

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@Fubar you are a Gentleman and a Scholar! Marry me.

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