Documentation:OCLOperators ViewModelAsXml

Usage

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 replaced/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

Naming nodes

If you set the Presentation name of the viewmodel attribut, that name will be used instead of the viewmodel attribute name. This enables you to have for example - (dash) in the node name.

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 child 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.

OCLOperators XsltTransformXml for transforming the created XML to another format.