PowerApps canvas app coding standards and guidelines
Power Apps coding guidelines - Power Apps | Microsoft Learn
Power Apps 编码指南 - Power Apps | Microsoft Learn
本文转自：Power Apps Standards: Naming Conventions - Matthew Devaney
Table Of Contents:
• Screen Names
• Control Names
• Variable Names
• Collection Names
• Datasource Table NamesScreen Names
A screen name should clearly describe its purpose in 2-3 words ending with word “Screen.” Use proper-case. A screen-reader will speak the screen name to visually-impaired users when the screen loads.
| Good Examples | Bad Examples | Bad Reason |
| Appointments Screen | Appointments | Missing the word ‘Screen’ |
| Order Form Screen | OrderFormScreen | Not friendly to a screen reader |
| Collect Signature Screen | scrCollectSignature | Not friendly to a screen reader |
Control Names
A control name should show the control-type, the purpose and the screen. Use camel-case and underscores for spacing. For example, the control named txt_OrderForm_FirstName is a text input that captures first name on the app’s Order Form Screen.
| Good Examples | Bad Examples | Bad Reason |
| drp_NewEmployee_Department | drpDepartmentNewEmployee | No spacing |
| btn_OrderForm_Submit | btn_Submit_OrderForm | Wrong order |
| gal_Home_Appointments | gly_Home Appointments | Non-standard control prefix |
A list of standard control prefixes can be found below.
| Control | Prefix |
| 3D Object | 3do |
| Add Picture | pic |
| Address Input | add |
| Audio | aud |
| Barcode Scanner | bar |
| Button | btn |
| Camera Control | cam |
| Canvas | cvs |
| Card | dtc |
| Charts | chr |
| Check Box | chk |
| Collection | col |
| Container | con |
| Combo Box | cmb |
| Component | cmp |
| Date Picker | dte |
| Drop Down | drp |
| Export | exp |
| Form | frm |
| Gallery | gal |
| Group | grp |
| HTML Text | htm |
| Icon | ico |
| Image | img |
| Import | imp |
| Label | lbl |
| List Box | lst |
| Map | map |
| Measuring Camera | mcm |
| Microphone | mic |
| Microsoft Stream | str |
| PDF Viewer | |
| Pen Input | pen |
| Power BI Tile | pbi |
| Radio | rad |
| Rating | rtg |
| Rich Text Editor | rte |
| Shapes | shp |
| Slider | sld |
| Table | tbl |
| Text Input | txt |
| Timer | tmr |
| Toggle | tgl |
| Video | vid |
Variable Names
A variable name should show the scope of the variable and its purpose. Use camel-case with no spaces between each word. For example, the variable gblUserEmail is a global variable which holds the current user’s email address.
| Good Examples | Bad Examples | Bad Reason |
| gblUserCurrent | UserCurrent | No scope |
| locPacksInBoxQuantity | Loc_Packs_In_Box_Quantity | Improper capitalization and spacing |
| LocIsLoading | locBoolLoading | Do not use data types in variable names |
| varWorkdaysDuringVacation | varWorkdays | Not descriptive enough |
Collection Names
A collection name should contain the original datasource and describe its purpose. Use camel-case with no spaces between each word. For example, the collection colDvInvoices is a collection of invoices from Dataverse.
| Good Examples | Bad Examples | Bad Reason |
| colSpEmployees | colEmployees | No datasource |
| colDvSalesLeads | coldv_salesleads | Improper capitalization and spacing |
| colNavigationMenu | NavigationMenu | Do no use data types in variable names |
A standard list of datasource abbreviations can be found below:
| Original Datasource | Abbreviation |
| Dataverse | Dv |
| SharePoint | Sp |
| SQL | Sql |
| Salesforce | Sf |
| None (created in-app) | (none) |
Datasource Table Names
A datasource created by the developer should have 1-3 words to describe its purpose. Use the singluar form of the word and proper-case. Be as concise and clear about the purpose of the datasource as possible.
| Good Examples | Bad Examples | Bad Reason |
| Employee | Emp | Abbreviation instead of full word |
| Construction Project | Projects | Too general, what type of projects? |
| Repair Order | RepairOrders | No spacing, plural |
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