Is it possible to overwrite file in document libraries with versioning enabled?
I am unable to find any information about this.
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Question is not clear. Is it about OOB interface or custom code? – Alok Kumar Gupta Mar 28 '17 at 10:21
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@AlokKumarGupta custom c# code using Microsoft.SharePoint2013.CSOM ver 15 – Andrii Horda Mar 28 '17 at 10:30
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What is an "overwrite" in this i.e. what do you think will happen - all previous versions of file will be removed or the currently uploaded file will become latest version? – Alok Kumar Gupta Mar 28 '17 at 10:32
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@AlokKumarGupta currently uploaded file will have same version number which was the latest before upload, overwriting file behind it – Andrii Horda Mar 28 '17 at 10:52
To overwrite file version you should use SystemUpdate method. For a long time is was available only in Server Side Object Model.
According to Office Dev blog post it is now available in CSOM also but only in SharePoint Online/Office 365 environment, as mentioned in this post.
Here is CSOM SystemUpdate method description in MSDN.
