DOM Count XML attributes

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4D v20 R7


DOM Count XML attributes ( elementRef ) -> Function result

Parameter	Type	Description
elementRef	String	XML element reference
Function result	Longint	Number of attributes

Description

The DOM Count XML attributes command returns the number of XML attributes present in the XML element designated by elementRef. For more information about XML attributes, refer to the Overview of XML DOM Commands section.

Example

Before retrieving the values of elements in an array, you want to know the number of attributes in the following XML element:

 C_BLOB(myBlobVar)

 C_TEXT($xml_Parent_Ref;$xml_Child_Ref)

 C_TEXT(myResult)

 C_LONGINT($numAttributes)

 

 $xml_Parent_Ref:=DOM Parse XML variable(myBlobVar)

 $xml_Child_Ref:=DOM Get first child XML element($xml_Parent_Ref)

 

 $numAttributes:=DOM Count XML attributes($xml_Child_Ref)

 ARRAY TEXT(tAttrib;$numAttributes)

 ARRAY TEXT(tValAttrib;$numAttributes)

 For($i;1;$numAttributes)

    DOM GET XML ATTRIBUTE BY INDEX($xml_Child_Ref;$i;tAttrib{$i};tValAttrib{$i})

 End for

In the above example, $numAttributes equals 3, tAttrib{1} contains “Font”, tAttrib{2} contains “N”, tAttrib{3} contains “size” and tValAttrib contains “Verdana”, “1” and “10”.

Note: The index number does not correspond to the location of the attribute in the XML file displayed in text form. In XML, the index of an attribute indicates its position among the attributes arranged in alphabetical order (according to their name).

System variables and sets

If the command has been correctly executed, the system variable OK is set to 1. If an error occurs, it is set to 0.