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The name of a field does not exist in the current context in AL Page Definition for Dynamics 365 BC

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Posted on by CU-13072004-0

Hello,

I am a beginner and have just started using Dynamics 365 BC and the AL programming language. I have a local version installed on my PC, which I believe is called On-Premises. I access the main page by entering localhost:8080/BC2030 in my browser.

I also have LS Central installed but am not sure how it relates to BC and the overall setup on my system. I thought it might be useful to provide some context about my setup as it might be the reason for the issues I am experiencing.

I am following the development of an extension from the book "Dynamics 365 Business Central Development Quick Start Guide." After setting up the tables for the extension, which you can see HERE and HERE, the authors proceed to create the related list pages to display the categories and gifts as lists. The list page for the categories is HERE.

However, when I try to use field(No; No)..., field(Description; Description)... in VS Code, it produces the error "The name 'No' does not exist in the current context".

even though you can see that the Source Table is recognized.

Any suggestions why this is case and how I could try to solve it. Thanks!

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Dynamics 365 Business Central

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Mohana Yadav 60,993 Super User 2025 Season 2 on at

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Please use Rec.No

field(No; Rec.No)

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Saurav.Dhyani 14,380 Super User 2025 Season 2 on at

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Hi,

Business Central currently does not support implicit Rec.

You will have to specify explicit Rec in the source expression.

To add a field in page Syntax is - Field (Name, Expression)

Rules are -

1. Name should be unique in the page.

2. Expression can be a formula or a field from source table.

3. If it's a field from source table then specify Rec.FieldName.

Hope it helps.

Regards,

Saurav Dhyani

https://bit.ly/SubscribeSauravYouTube

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Gerardo Rentería Ga... 25,213 Most Valuable Professional on at

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Hi

I hope this can help you.

Dynamics 365 Business Central: obsoleting the WITH statement – Stefano Demiliani

BR

GR

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Govinda Kumar 2,304 Moderator on at

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Hi,

In Business Central, you cannot write expressions without using the implicit Rec. The correct way to write expressions is by explicitly using Rec.

page 50100 "Customer Category List" { PageType = List; SourceTable = "Customer Category"; UsageCategory = Lists; // To be inserted in D365BC Search ApplicationArea = All; Caption = 'Customer Category List'; layout { area(content) { repeater(Group) { field(No; Rec.No) { ApplicationArea = All; } field(Description; Rec.Description) { ApplicationArea = All; } } } } }

You can find more information here.

Best regards,
Govinda Kumar

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