InsertTextBefore (XmlNode function): Difference between revisions
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<li>If <var class="term">value</var> is the null string, a <var>Text</var> node is not inserted, and <var class="term">%nod</var> is set to <var>Null</var>. | <li>If <var class="term">value</var> is the null string, a <var>Text</var> node is not inserted, and <var class="term">%nod</var> is set to <var>Null</var>. | ||
<li>As of <var class="product">[[Sirius Mods | <li>As of <var class="product">[[Sirius Mods]]</var> Version 7.3, <var class="term">value</var> may include only non-null EBCDIC characters that translate to <var>Unicode</var>. As of <var class="product">"Sirius Mods"</var> Version 7.6, all <var class="product">[[Janus SOAP|"Janus Soap"]]</var> string arguments and results are <var>Unicode</var> or are converted to <var>Unicode</var>. For more information about the effects of this version 7.6 change, see [[XmlDoc API#Strings and Unicode with the XmlDoc API|"Strings and Unicode with the XmlDoc API"]]. | ||
<li>Since the return value of <var>InsertTextBefore</var> is frequently not needed, you may want to <var>[[Notation_conventions_for_methods#Callable_methods|Call]]</var> it instead of saving its return value. | <li>Since the return value of <var>InsertTextBefore</var> is frequently not needed, you may want to <var>[[Notation_conventions_for_methods#Callable_methods|Call]]</var> it instead of saving its return value. | ||
<li>To modify the value stored in an <var>Text</var> node, change the <var>[[Value_(XmlDoc/XmlNode_property)|Value]]</var> property of an <var>XmlNode</var> that points to the <var>Text</var> node. | <li>To modify the value stored in an <var>Text</var> node, change the <var>[[Value_(XmlDoc/XmlNode_property)|Value]]</var> property of an <var>XmlNode</var> that points to the <var>Text</var> node. | ||
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<li><var class="term">Nod</var> is a <var>Text</var> node, or the sibling following a <var>Text</var> node, and the <var>[[AdjacentText (XmlDoc property)|AdjacentText]]</var> property setting is <code>Disallow</code>. | <li><var class="term">Nod</var> is a <var>Text</var> node, or the sibling following a <var>Text</var> node, and the <var>[[AdjacentText (XmlDoc property)|AdjacentText]]</var> property setting is <code>Disallow</code>. | ||
<li><var class="term">Nod</var> is a child of the <var>Root</var> node. | <li><var class="term">Nod</var> is a child of the <var>Root</var> node. | ||
<li><var class="term">Value</var> violates the rules for XML Element content (that is, it contains an invalid character). Note that as of <var class="product">"Sirius Mods"</var> Version 7.6, this check can no longer be bypassed using the <var>InvalidChar</var> method — see <var>[[InvalidChar (XmlDoc property)#Usage notes|"Usage notes for the InvalidChar property"]]</var>. | <li><var class="term">Value</var> violates the rules for XML Element content (that is, it contains an invalid character). Note that as of <var class="product">"Sirius Mods"</var> Version 7.6, this check can no longer be bypassed using the <var>InvalidChar</var> method &mdash; see <var>[[InvalidChar (XmlDoc property)#Usage notes|"Usage notes for the InvalidChar property"]]</var>. | ||
<li>Insufficient free space exists in CCATEMP. | <li>Insufficient free space exists in CCATEMP. | ||
</ul> | </ul> | ||
Revision as of 17:27, 24 May 2011
Insert Text node before this node (XmlNode class)
[Requires Janus SOAP]
InsertTextBefore inserts a Text node as the immediate sibling preceding the method XmlNode.
Syntax
[%outNod =] nod:InsertTextBefore( value)
Syntax terms
| %outNod | If specified, an XmlNode that is set to point to the Text node that is inserted. |
|---|---|
| nod | XmlNode that points to the node before which the Text node is inserted. The node may be any type except Root or Text. |
| value | The content of the Text node. This Unicode string value is stored without any normalization, entity substitution, etc. |
Usage notes
- If value is the null string, a Text node is not inserted, and %nod is set to Null.
- 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 with the XmlDoc API".
- Since the return value of InsertTextBefore is frequently not needed, you may want to Call it instead of saving its return value.
- To modify the value stored in an Text node, change the Value property of an XmlNode that points to the Text node.
- Processing of an XmlDoc is likely to be more efficient if you add nodes in document order (that is, top-to-bottom, left-to-right).
- A Text node may not be inserted adjacent to (that is, as a sibling of) another Text node, unless the AdjacentText property setting is
Combine.
Examples
-
In the following example, a Text node is inserted before node "b" (that is, as its immediately preceding sibling):
begin %doc is object xmlDoc %doc = new %doc:loadXml('<top><a><c/><b>05</b></a></top>') %n1 is object xmlNode %n2 is object xmlNode %ls is longstring %ls = 'Text node never contains the null string' %n1 = %doc:selectSingleNode('top/a/b') %n2 = %n1:InsertTextBefore(%ls) %doc:Print('top') end
The example result follows. Note that this XML document structure (element "a" having "mixed content," both an Element and Text child) is common to document usage with XML. But it is unusual for data usage with XML (in fact, the SOAP standard disallows mixed content):
<top> <a> <c/> Text node never contains the null string <b>05</b> </a> </top>
Request-Cancellation Errors
- Nod is the Root node.
- Nod is a Text node, or the sibling following a Text node, and the AdjacentText property setting is
Disallow. - Nod is a child of the Root node.
- Value violates the rules for XML Element content (that is, it contains an invalid character). Note that as of "Sirius Mods" Version 7.6, this check can no longer be bypassed using the InvalidChar method — see "Usage notes for the InvalidChar property".
- Insufficient free space exists in CCATEMP.
See also
- AddText also adds a Text node. InsertTextBefore adds a Text as the immediately preceding sibling of the node pointed to by the method object. AddText adds a Text as the last child of the node pointed to by the method object.