Developer and family man.C# Beginners Tutorial - 113 - Write Nodes to Existing XML File
Loves C. Automate Everything! Holy smokes. So simple it blows my mind. So everything is great, right? Make sure that it exists. You would think that checking if an element exists would be straight-forward and easy right? Well, it almost is. So basically you need an extra 2 lines in order to setup an XmlNamespaceManager every time you need to look for a node.
It also takes a NodeSeparatorCharacter that defaults to a period. I prefer the dot notation, but for those who like the slash just override the NodeSeparatorCharacter with a slash. This is simple; instead of using. SelectSingleNode we can use. Here is the rewritten code, with the new Get-XmlNodes function:. Note the comma in the return statement of the Get-XmlNamespaceManager function.
It took me a while to discover why things broke without it.
Add node to existing xml file
So once I had this, I decided that I might as well make functions for easily getting and setting the text values of an xml element, which is what is provided here:. The Get-XmlElementsTextValue function is pretty straight forward; return the value if it exists, otherwise return null. The Set-XmlElementsTextValue is a little more involved because if the element does not exist already, we need to create the new element and attach it as a child to the parent element.
Rather than copy-pasting, you can download all of the functions shown here. July 22, at AM. Thanks for the article and code samples. Much appreciated as I was coming across the error described when checking for the existence of an XML element. One small point, I think you have some typos in the code block. All fixed now. July 29, at AM. OpenBinary and OpenBinaryStream which have read ok, but still no luck saving. My situation is concerns a library of InfoPath form data - stored as xml - which I need to bulk amend.
July 30, at AM. January 28, at AM. July 3, at PM. September 18, at AM. Excellent Blog…. I was trying to figure out how to dynamically determine the namespace of an xml file so I could then include it in my xpath for pulling data…. This information was perfect for me and worked. November 19, at PM. How about getting a list of all nodes and all children?The ImportNode method is the mechanism by which a node or entire node subtree is copied from one XmlDocument to another.
The node returned from the call is a copy of the node from the source document, including attribute values, the node name, node type, and all namespace-related attributes such as the prefix, local name, and namespace Uniform Resource Identifier URI. The source document is not changed. After you have imported the node, you still have to add it to the tree using one of the methods used to insert nodes. When the node is attached to its new document, the new document owns the node. The reason is that each node, when created, has an owning document, even if the nodes are created in separate document fragments.
For example, CreateElementis the only way to create new nodes. Depending on the node type of the imported node and the value of the deep parameter, additional information is copied as appropriate. This method attempts to mirror the behavior expected if a fragment of XML or HTML source was copied from one document to another, accounting for the fact that for XML, the two documents may have different document type definitions DTDs.
Although DocumentType nodes can be imported, a document can only have one DocumentType. So, once you have imported the document type, before inserting it into tree you have to make sure that there is no document type in the document. You may also leave feedback directly on GitHub. Skip to main content. Exit focus mode. The following table describes the specific behavior for each type of node that can be imported.
The descendants of the source XmlAttribute are recursively imported and the resulting nodes reassembled to form the corresponding subtree. The deep parameter does not apply to XmlAttribute nodes, because they always carry their child nodes with them when imported.
XmlCDataSection Copies the node, including its data. Copies the node, including its data. XmlComment Copies the node, including its data.
XmlDocumentFragment The descendants of the source node are recursively imported and the resulting nodes reassembled to form the corresponding subtree. An empty XmlDocumentFragment is created. XmlDocumentType Copies the node, including its data. Note: Default attributes are not copied.
If the document being imported into defines default attributes for this element name, those are assigned. Specified attribute nodes of the source element are imported, and the generated XmlAttribute nodes are attached to the new element. The descendant nodes are not copied. XmlEntityReference Because the source and destination documents could have the entities defined differently, this method only copies the XmlEntityReference node.
The replacement text is not included. If the destination document has the entity defined, its value is assigned. Because the source and destination documents could have the entities defined differently, this method only copies the XmlEntityReference node. XmlProcessingInstruction Copies the target and data value from the imported node. Copies the target and data value from the imported node.The script below was created to read an xml file and then update the variable enableTest, in the xml file, from false to true; the variable is updated, however for some reason the format of the xml is changed, as any empty elements will have a carriage return created inside them — does anyone have any idea why?
I changed my powershell script to what is shown below, this corrected the issue with the empty elements, but now I have an issue with two elements and everything inside these two elements is now being written along one line. Can you create sample XMLs with same schema that you have and share here. Use git. For more details, please share the schema of your XML config file with dummy data. This topic has 6 replies, 4 voices, and was last updated 10 months, 3 weeks ago by.
May 23, at pm Topics: 1. Replies: 2.
Copying Existing Nodes from One Document to Another
Hi Everyone The script below was created to read an xml file and then update the variable enableTest, in the xml file, from false to true; the variable is updated, however for some reason the format of the xml is changed, as any empty elements will have a carriage return created inside them — does anyone have any idea why?
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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Seems that you need to import the element first since it comes from another XML document instance, something like this :.
Learn more. Asked 4 years, 1 month ago. Active 4 years, 1 month ago. Viewed 2k times. The script opens Template. Save "Master. I keep getting error messages about AppendChild Any suggestions??? Mr Lister 40k 13 13 gold badges 84 84 silver badges bronze badges.
Sushi Dr. Sushi 4 4 silver badges 18 18 bronze badges. I suggest: define not working You cannot call a method on a null-valued expression. At Parser. Sushi Mar 5 '16 at Active Oldest Votes. Got me the right thing working, but I had to remove one little mistake, instead of Entities. Entity and everything worked fine!
Sure, AppendChild should've been invoked on the parent of Entity. Thanks for the confirmation and correction, answer has been updated accordingly. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.Test 12! CAForms 12!
Reading XML and Updating element – changing format of XML file, why?
Method invocation failed because [System. NET Framework at this level. I am going to try to help you with this as best I can. When dealing with an XML document, you have to create a new element of the file off of the schema from the document itself. If I understood what you were trying to do, this should get you going. If you want a more indepth explanation, I have used a similar technique on a blog post when adding docicons to a Sharepoint icons file.
I walked away and forgot one important thing. In reality. EXEC master. I would also suggest using a substitution method for generating your strings. That is an if. SDBA 12! When using double quotes, Powershell will do string expansion. If you have some specific code that is not working, or not working well, I am happy to try to help with that. Please understand that my answer is not meant to be an attack.
As you said i have got the code from different sources and i have customized it according to my requirement…. This topic has 16 replies, 3 voices, and was last updated 6 years, 11 months ago by. May 7, at pm Topics: Replies: Don Jones. Jonathan Tyler. Topics: 0. Hi Venkat, I am going to try to help you with this as best I can.
Wash, rinse, repeat. Hope this helps you out! Thanks Jonathan for your help…. May 8, at am XML is an essential data interchange format because it remains the most reliable way of ensuring that an object's data is preserved. Fortunately, PowerShell makes it all easy, as Michael Sorens demonstrates. As with any high-level language, the data is at the heart of PowerShell.
This is the second of a series of articles that shows you how to import almost all of the common data formats you are likely to encounter, and how to export to some of them as well.
Here we concentrate on getting the most from XML. Figure 1 shows a representation of the schema underlying the file in a concise format particularly when compared to reading the raw XSD file! To select a set of nodes use the SelectNodes method:. Ralls, Kim. Corets, Eva.
Randall, Cynthia. Thurman, Paula. Knorr, Stefan. Kress, Peter. Or use SelectSingleNode to return just one node:.
Notice in the first example that there are duplicates. Suppose instead that you want a list of unique authors in the catalog. You might think that something like …. To understand why that failed, you would need to understand more about the structure of XML documents.
The first example actually returned a list of text nodes i. Since all the items in the collection are text nodes, and so are all the same element type, all nodes beyond the first are therefore considered to be duplicates.
The result is that only the first is returned.Obejectve : We have xml files with same node structure. However, everytime source is updated with certain value it has to be updated manually into target xml node.
We would to automate this one where whenever source file is updated anyone from team will let the automation guy know about it and then automation guy will execute this script to update the target xml node with laest value. Current Situation Is :. It makes it much easier to get a good answer. Thanks for you reply.
That where i am confused about why it is holding empty value. Also I am posting fresh code as required and guided. Similarleyfor Section B it is able to get the value and delete the required node.
I am not quite sure about wheather i am using correct syntax or not. If required i can also paste the XML syntax again. However, i have already posted in my previous post. I can not see the output to see what is actually being generated and do not have the input data to recreate.
I have just executed above code prior as what you have suggest. Here is the following values what i have got. But when i am trying to hold the same value in another variable it is giving me a null value. I am not able to understand this cause. Don't know why it is not accepting the value which i have it already in Section A code.
I have re-modified the code and also i am attaching the source config. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. Popular Topics in PowerShell. Which of the following retains the information it's storing when the system power is turned off?