SharePoint: How to retrieve specific version of file from a document library thro’ programmatically?
The SPFile.Versions API can be used to retrieve the specific version of the document library.
I have compiled a sample code snippet to retrieve the specific version of the document library.
//Open the web
SPWeb web = new SPSite("https://karthickmain:9091/sites/siteb").OpenWeb();
//Get the folder
SPFolder folder = web.Folders["Shared Documents"];
//Get the file
SPFile file = folder.Files["abc.doc"];
//Get all the versions
SPFileVersionCollection versions = file.Versions;
//Get the first version
SPFileVersion version = versions[3];
//Get the data
byte [] dBytes = version.OpenBinary();
How to restore a specific version back to the document library thro’ programmatically?
There are two ways we can restore the document.
1. SPFileVersionCollection.Restore() method
//restore specific version
versions.Restore(3);
2. SPFile.SaveBinary() method
file.SaveBinary(versions[3].OpenBinary());
But however the Restore method is more efficient as per msdn
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