InsertCommentBefore (XmlNode function)

Insert Comment before XmlNode

InsertCommentBefore is a member of the XmlNode class.

This callable function inserts a Comment node as the immediate sibling preceding the method XmlNode.

Syntax

  [%nod =] nod:InsertCommentBefore(value)

Syntax Terms

%nod

If specified, an XmlNode that is set to point to the Comment node that is added.

nod

XmlNode pointing to the (non-Root) node before which the Comment node is inserted.

value

A Unicode string that is the value of the added Comment node; stored exactly as is, that is, without whitespace normalization.

Usage Notes

• Since the return value of InsertCommentBefore is frequently not needed, you may want to Call it instead of saving its return value.
• As of Sirius Mods version 7.3, value may include only non-null EBCDIC characters that translate to Unicode. As of Sirius Mods version 7.6, all Janus SOAP string arguments and results are Unicode or are converted to Unicode. For more information about the effects of this version 7.6 change, see Strings and Unicode.
• There is a very small “one-time” processing cost if certain XPath operations are performed after using this method, because Insert-Before methods are guaranteed to add a node out of document order. In general, processing an XmlDoc is likely to be more efficient if you add nodes in document order (that is, top-to-bottom, left-to-right).
• To modify the value stored in a Comment node, change the Value property of an XmlNode that points to the Comment node.

Example

In the following example, a Comment node is inserted before node “a”:

    Begin
    %doc is Object XmlDoc
    %doc = New
    Call %doc:LoadXml('<top><a><b>05</b></a></top>')
    %n1 is Object XmlNode
    %n1 = %doc:SelectSingleNode('top/a')
    Call %n1:InsertCommentBefore('legacy code follows')
    Call %doc:Print
    End

The example results follow:

    <top>
       <!--legacy code follows-->
       <a>
          <b>05</b>
       </a>
    </top>

Request-Cancellation Errors

• Nod is the Root node.
• Argument value violates the rules for an XML comment.

See Also

• AddComment (?? reftxt=AddComment refid=addcom.) also adds a Comment node. InsertCommentBefore adds a Comment as the immediately preceding sibling of the node pointed to by the method object; AddComment adds a Comment as the last child of the node pointed to by the method object.
• For hints about inserting a node after a sibling node, see the “Example” section in ??InsertElementBefore.