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POEnsure 2 methods succeed else roll back
 

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    <p>Can anyone please tell me whether this is possible. </p> <p>I have some code that allows a user to upload/change their image, before the change takes place I delete the default/old image from disk before uploading new image.</p> <p>Problem is if something goes wrong either with the delete or upload, how can I roll back both so that the original image is returned. </p> <p>I thought I could use tranactionscope, but either I'm not using it correctly or it not applicable for this case.</p> <p>All the examples I have found involve using 2 call to database, but my code only involves one call and that's to update.</p> <pre><code>//TODO check transactionscope works ok using (var tran = new TransactionScope()) { //Delete old image before updating new image //123 bogus number to throw error var deleteOldImage = _igmpfu.DisplayProfileDetailsForUpdate("123") .FirstOrDefault(); if (Convert.ToString(deleteOldImage) != "5bb188f0-2508-4cbd-b83d-9a5fe5914a1b.png") { DeleteOldImage(deleteOldImage); } //Insert new image var imageGuid = imageId + ".png"; bool imageUrl = _iuma.UpdateAvatar(cookieId, imageGuid); if (imageUrl) { TempData["Message"] = "Image updated"; return RedirectToAction("Index", "Members"); } tran.Complete(); } </code></pre> <p>Any assistance in helping a newbie would be appreciated</p> <p>//------------------------</p> <p>I have been looking at the computer to long, all I had to do was </p> <pre><code>var deleteOldImage = _igmpfu.DisplayProfileDetailsForUpdate("123").FirstOrDefault(); if (deleteOldImage != null) { code here for writing to disk } </code></pre> <p>I have spent ages trying to work this out and thats all I had to do :-(</p> <p>Thanks everyone for their replies.</p>
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    1. USGeorge Phillipson
    1. USGeorge Phillipson
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    1. COIf one of your 2 calls to the database failed, then the transaction won't complete, it will only persist to the database once the tran.complete is called, thus it will rollback automatically. I think you are in the right track.
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    2. COHi Leo, thanks, but the problem I have is its still saves the uploaded image to disk, which is not what I want
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      1. USGeorge Phillipson
    3. CO@LeoLorenzoLuis - the TransactionScope is worthless unless every class being called inside it knows how to participate in the transaction which I doubt whatever `_igmpfu` and `_iuma` are do.
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      1. USTrevor Pilley
 

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