Do you want to learn more about Isolated Storages?
Isolated Storage is a data storage that provides isolation between extensions, so that you can keep keys/values in one extension from being accessed from other extensions.
Read the full documentation here: https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-isolated-storage
Lets extend the standard "Copy Purchase Document" report to get some customization there.
reportextension 50300 "BIT Copy Purchase Document" extends "Copy Purchase Document"
{
requestpage
{
layout
{
addlast(Options)
{
field(CopyHTMLTexts; CopyHTMLTexts)
{
ApplicationArea = All;
trigger OnValidate()
begin
if IsolatedStorage.Contains('Html') then
IsolatedStorage.Delete('Html');
IsolatedStorage.Set('Html', Format(CopyHTMLTexts));
end;
}
}
}
}
var
CopyHTMLTexts: Boolean;
}
After we published the code of our first implementation we discovered a very strange behaviour in our local docker container and even in our SaaS tenant.
By validating that field on my requestpage the webclient throws an exception:
Ok, something went wrong, but what exactly?
Let take a look at the event log by running powershell and the "Get-BcContainerEventLog"
command:
Ok that's the problem:
Unable to cast object of type 'Microsoft.Dynamics.Nav.Runtime.NCLReportExtension' to type 'Microsoft.Dynamics.Nav.Runtime.NCLPageExtension'.If you get this kind of an error just move your code into a procedure to cast it correctly ;-)
reportextension 50300 "BIT Copy Purchase Document" extends "Copy Purchase Document"
{
requestpage
{
layout
{
addlast(Options)
{
field(CopyHTMLTexts; CopyHTMLTexts)
{
ApplicationArea = All;
trigger OnValidate()
begin
SetIsolatedStorage();
end;
}
}
}
}
local procedure SetIsolatedStorage()
begin
if IsolatedStorage.Contains('Html') then
IsolatedStorage.Delete('Html');
IsolatedStorage.Set('Html', Format(CopyHTMLTexts));
end;
var
CopyHTMLTexts: Boolean;
}