Documentation:OCLOperators ViewModelAsXml

Used to create XML documents based on a viewmodel.

Example;

selfVM.ViewModelAsXml('ReportExportToXML', vCurrent_ReportExportView)

This code will output a valid XML text for saving to a file/downloaded by a client;

vCurrent_ReportExportView.XML := selfVM.ViewModelAsXml('ReportExportToXML', vCurrent_ReportExportView).
replace('<root>', '<?xml version="1.0" encoding="ISO-8859-1"?>').
replace('</root>', '');

In the example the root elements are replace/removed and an XML header is added to make it a XML file (not a DOM representation).

Note the encoding in the XML header says ISO-8859-1. But the string type in .Net is always Unicode in memory. To save this correctly you need to convert it upon saving.

You can convert from Unicode to ISO-8859-1 like this (generated XML is stored in self.XML in this example);

self.XML.StringToEncodedBase64(28591).Base64ToBlob

The value 28591 is ISO 8859-1 Latin 1; Western European (ISO) taken from this table: https://docs.microsoft.com/en-us/windows/desktop/intl/code-page-identifiers

Converting it to a blob is necessary for downloading and will create a download link, read more here: BlobDownloadLink

Tagged value options

XmlChildnode

Default for single associations in the viewmodel is to add more elements to the parent with the style <classname>.<attribute name>. If you use XmlChildNode = true, single associations will be rendered as an XML element instead.

Default for many associations in the viewmodel is to add a child element and then one child element under that for each object in the association. If you use XmlChildNode = false, the first child element will be omitted.

XmlAttribute

Default for attributes in the viewmodel is to be rendered as a XML element. If you use XmlAttribute = false, columns will be rendered as an XML attribute instead.

See also: OCLOperators StringToBase64 for UTF8 encoding.