{"id":43169,"date":"2020-04-16T17:01:00","date_gmt":"2020-04-16T17:01:00","guid":{"rendered":"http:\/\/sticky-highjinx.flywheelsites.com\/?p=43169"},"modified":"2025-03-04T02:37:41","modified_gmt":"2025-03-04T07:37:41","slug":"d365-developer-series-syslastvalue-single-line","status":"publish","type":"post","link":"https:\/\/envistacorp.com\/en-au\/2020\/04\/16\/d365-developer-series-syslastvalue-single-line\/","title":{"rendered":"D365 Developer Series: SysLastValue in a Single Line"},"content":{"rendered":"Reading Time: <\/span> 2<\/span> minutes<\/span><\/span>\n

How to default usage data to a form from previous user input using a single line of code<\/h2>\n\n\n\n

When you open a form in Microsoft Dynamics 365, sometimes field values seem to default based on how you previously set them. This functionality is oftentimes solved from a framework called SysLastValue. There are two ways to implement this, and usually when we research how to use it, we\u2019re greeted with the pattern that takes several lines of code and multiple methods (pack \/ unpack). This is also cumbersome to implement on an existing form on Dynamics 365 because we\u2019re no longer allowed to overlayer but must achieve this via extension.   <\/p>\n\n\n\n

Today, I will show you how to implement SysLastValue in a single line, and show you examples on how to do this via extension. See our previous blog on extensibility<\/a> and its importance. <\/p>\n\n\n\n

Scenario <\/h2>\n\n\n\n

Default the warehouse based on previous user\u2019s selection. The code below is using a controller class named envBinTransferJournalController which is an extension instance registered on FormRun. This code can also be implemented using event handlers. <\/p>\n\n\n\n

Storing the value in usage data <\/h2>\n\n\n\n

This code should be executed after formRun.close(). <\/p>\n\n\n\n

\/\/ Get the value from the form so you can put it in sysLastValue \n\nInventLocationId localInventLocationId = FormRun.Control(FormRun.controlId(formControlStr(envBinTransferJournal, InventLocationId))).valueStr();  \n\n\/\/ It requires you store the value as a container, so you can easily store 
more than one value if you wanted to \n\nxSysLastValue::putValue([localInventLocationId], curExt(), curUserId(), UtilElementType::Class, classStr(envBinTransferJournalController)); \n<\/code><\/pre>\n\n\n\n
Getting the value from usage data <\/h2>\n\n\n\n
This code should be executed after formRun.init(). <\/p>\n\n\n\n
InventLocationId localInventLocationId;  \n\n\/\/ You\u2019re getting the value as a container because that is what you stored 
it in (required data type) \n\n[localInventLocationId] = xSysLastValue::getValue(curExt(), curUserId(), UtilElementType::Class, classStr(envBinTransferJournalController)); \n\n\/\/ You now have the last value used and can default a control with it \n\nFormStringControl localWarehouseControl = FormRun.Control(FormRun.controlId(formControlStr(envBinTransferJournal, InventLocationId))); \n\nlocalWarehouseControl.text(localInventLocationId); <\/code><\/pre>\n\n\n\n
Notes on Implementation <\/h2>\n\n\n\n
When using this single line method, you will have two parameters on both the Set and Get. They are passing in the element type<\/a> and the ID of which to store as the key to retrieve or store. We strongly recommend using intrinsic functions<\/a> as this will eliminate the chance of a runtime error if the object name changes because the error will happen when you compile.    <\/p>\n\n\n\n
While the example above shows storing a single value from user input, we recommend storing a data contract to support extensibility. We also recommend hydrating the data contract in the controller class that supports extension\/subscription, allowing the next developer to add defaulting values.  <\/p>\n\n\n\t\t
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\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\"A<\/div><\/a>\n\t\t\t\t
White Paper<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\tHidden Treasures of Advanced Warehousing\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
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Make the most of Microsoft Dynamics 365\u2019s Advanced Warehousing module and gain insight into the hidden treasures to unlock value.<\/p>\n\t\t<\/div>\n\t\t\n\t\t
Data Contracts<\/a><\/p>\n\n\n\n
X++ Chain of Command<\/a><\/p>\n\n\n\n
Extending Full-Text<\/a><\/p>\n\n\n\n
Merging Financial Dimensions in D365 F&O<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Learn how to default usage data to a form from previous user input using a single line of code.<\/p>\n","protected":false},"author":22,"featured_media":46821,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_searchwp_excluded":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[3475],"tags":[3934,3746,3561],"class_list":["post-43169","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-data-analytics","tag-dynamics-365","tag-microsoft"],"acf":[],"yoast_head":"\nD365 Developer: SysLastValue in One Line | enVista<\/title>\n<meta name=\"description\" content=\"Learn how to default usage data to a form from previous user input using a single line of code.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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