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For example at this point I wanted to update the status field for all list items simply to indicate that another background job being handled by a windows service had been initiated that would process on every list item.
Because the Xml Document holds everything in memory for you, updating an existing XML file becomes a lot simpler.
The following example opens the "test-doc.xml" file that we created in the previous chapter and increases every user's age by one. We then iterate through them, read the age attribute into an integer variable, and then we write the value back to the node and attribute, after increasing the value by 1.
At last, we save the document back to the same file and if you open it up, you will see that our users all just had a birthday.
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Attributes are of course appended to the elements where they belong, using the Append() method on the Attributes property.
The entire XML document is written to the disk on the last line, where we use the Save() method.
How should a stored procedure update be done with Entity Framework?
I removed the proc, regenerated the model, deleted the 'cs' files for the proc, compiled, then added the procedure to the database again, regenerated the model, and bang! Save the edmx (by clicking in the window then ctrl S).
I ended up just renaming the proc and importing via model update from database. Added a new column, and renamed an existing column.
I refreshed the EDMX via update model from database, but there were no changes to the EDMX, and obviously at run time, it fails.
Each time we do that, we append the elements, either directly to the document, or to another element.