How to Extract Data from XML and Replace Values Using PowerShell

Learn how to effortlessly extract data from XML files and replace values using PowerShell. This guide covers key techniques step-by-step for easy implementation.
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Extracting and Replacing XML Data Using PowerShell

Working with XML files can often be tricky, especially when you need to extract specific data and manipulate XML elements. In this guide, we'll tackle a common scenario: extracting a value from an XML tag and using it to replace another value within the same XML structure. This walkthrough focuses on using PowerShell for those tasks. So, let’s get started!

The Challenge

Imagine you have a sample XML file that appears as follows:

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Your goal is to extract the amount found in the <OrgnlIntrBkSttlmAmt> tag (which in this case is 25.23) and use it to replace the value in the <CtrlSum> tag (currently 0).

The Solution

Step 1: Correcting the XML Structure

Before performing any operations, ensure your XML structure is valid. The given XML is incomplete and missing necessary closing tags. Once corrected, it will look like this:

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Step 2: Loading the XML File

In PowerShell, we can easily load the XML file using the Get-Content cmdlet. Here's how:

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Step 3: Extracting the Amount

Next, we need to extract the amount from the <OrgnlIntrBkSttlmAmt> tag. Here's how you can do that:

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Using this code, we navigate through the XML structure and retrieve the desired value.

Step 4: Replacing the Value in CtrlSum

Now that we’ve extracted the appropriate amount, we can now replace the value in the <CtrlSum> tag:

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Step 5: Saving the Updated XML

Finally, save the updated XML file back to the original location:

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This will write the changes back to the file, consolidating the extracted value into the correct tag.

Conclusion

Manipulating XML data with PowerShell can streamline your workflow significantly. By following this guide, you can efficiently extract specific values from XML files and update other elements accordingly. This approach can be particularly useful in scenarios where automation is crucial, such as processing financial data or saving configuration values.

If you encounter any issues or have questions, feel free to comment below. Happy scripting!