HOW TO load xml from a file in C/AL

In the following example we are going to: open a file, create an InStream object, create an XmlDocument using the DotNet component and load the xml from the InStream.

This example requires that you create the following variables:

Name DataType Subtype
TestFile File
Istream InStream
XmlDoc DotNet
System.Xml.XmlDocument.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

HOW TO load xml from a file in C/AL?

TestFile.OPEN('C:\TestFolder\TestFile.xml');
TestFile.CREATEINSTREAM(Istream);

XmlDoc := XmlDoc.XmlDocument();
XmlDoc.Load(Istream);

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HOW TO test if a DateFormula variable is empty

We can learn a lot reading Microsoft standard C/AL code.

HOW TO test if a DateFormula variable is empty?

An example is offered in the Table 5088 Profile Questionnaire Line

TESTFIELD("Starting Date Formula",ZeroDateFormula);

Solution:
Create a Global Variable named like ZeroDateFormula of DataType DateFormula and don’t assign any value to it.

Now you can use this variable to test if a DateFormula variable is empty.

IF PeriodLength = ZeroDateFormula THEN
  ERROR(Text001); 

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