Now I've put a condition to the second and is only running in case the first one failed. Sorry, something went wrong. I am getting below error One or more errors occurred. String literal was not closed. Skip to content. Sign in Sign up. Instantly share code, notes, and snippets. Note that in this scenario there is no need to specifially match categories or category , because the processor will automatically process all children, unless we tell it otherwise in this example, the second and third template do not further process the children, because there is no xsl:apply-templates in them.
This approach is more easily extendible then the imperative approach, because it automically deals with multiple categories and it can be expanded for other elements or exceptions by just adding another matching template.
Programming without if-branches. Note: there is no such thing as null in XML. There is xsi:nil , but that is rarely used, especially rarely in untyped scenarios without a schema of some sort. In some cases, you might want to know when the value is specifically null, which is particularly necessary when using XML which has been serialized from. NET objects. While the accepted answer works for this, it also returns the same result when the string is blank or empty, i.
Sometimes it's necessary to know the exact state and you can't simply check if CategoryName is instantiated, because unlike say Javascript. Edit : This covers the most likely interpretation, in my opinion, of "[not] null or empty" as inferred from the question, including it's pseudo-code and my own early experience with XSLT.
Yes xsi: nil , but it is rarely used, especially in the untyped scene without a certain pattern. Programmer Group A programming skills sharing group. For example, if the categoryName is empty? What I use when selecting constructs is. Dirk Vollmar k 53 53 gold badges silver badges bronze badges.
It's appreciated that you included multiple examples to show how each expression results. Instead, you only deal with nodes, or elements in this case, which is the whole between start-tag and end-tag.
I starred the question specifically for this answer, and while the question is pretty old, this one seems much more deserving of being the selected answer — Patrick. From Empty Element : To test if the value of a certain node is empty It depends on what you mean by empty. Contains no child nodes: not node Contains no text content: not string.
Contains no text other than whitespace: not normalize-space. Contains nothing except comments: not node [not self::comment ]. Mads Hansen Chris Doggett Chris Doggett Some notes. The first bulletpoint also tests for text-content, which is also a node. The second bulletpoint tests for any text node at any depth, if you want to know if the current node does not contain text, but can contain other nodes, you can use not text.
An alternative to your 2nd bullet is also not. As your last bullet shows: there are many ways to consider "nothingness" ;. Very practical: To test if a string is not empty, you can just test the string itself! What about? This works great. First two deal with null value and second two deal with empty string. Aleksandar Borkovac Aleksandar Borkovac 3 3 silver badges 10 10 bronze badges. What if there are multiple users or multiple firstnames? Use xsl:apply-templates and matching templates to get what you want, much easier.
This is probably the simplest XPath expression the one in accepted answer provides a test for the opposite, and would be longer, if negated : not string categoryName Explanation : The argument to the not function above is false exactly when there is no categoryName child "null" of the context item, or the single such categoryName child has string value -- the empty string.
Learn more about the importance of avoiding conditional constructs in this nice Pluralsight course: " Tactical Design Patterns in. Dimitre Novatchev Dimitre Novatchev k 26 26 gold badges silver badges bronze badges. Hi Dimitre, i need your solution for 1.
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