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POmulti-step registration process issues in asp.net mvc (split viewmodels, single model)
 

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    <p>I have a <strong>multi-step registration process</strong>, backed by a <strong>single object in domain layer</strong>, which have validation rules defined on properties.</p> <p>How should I validate the domain object when the domain is split across many views, and I have to save the object partially in the first view when posted?</p> <p>I thought about using Sessions but that's not possible cause the process is lengthy and amount of data is high, So I don't want to use session.</p> <p>I thought about saving all the data in an relational in-memory db (with the same schema as main db) and then flushing that data to main db but issues arisen cause I should route between services (requested in the views) who work with the main db and in-memory db.</p> <p>I'm looking for an elegant and clean solution (more precisely a best practice).</p> <p><strong>UPDATE AND Clarification:</strong></p> <p>@Darin Thank you for your thoughtful reply, That was exactly what I've done till now. But incidentally I've got a request which have many attachments in it, I design a <code>Step2View</code> e.g. which user can upload documents in it asynchronously , but those attachments should be saved in a table with referential relation to another table that should have been saved before in <code>Step1View</code>.</p> <p>Thus I should save the domain object in <code>Step1</code> (partially), But I can't, cause the backed Core Domain object which is mapped partially to a Step1's ViewModel can't be saved without props that come from converted <code>Step2ViewModel</code>.</p>
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    1. USJahan Zinedine
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    1. COgreat question Jani
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    2. CO@Jani, Did you ever figure out the upload piece of this? I'd like to pick your brain. I am working on this exact issue.
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    3. COpossible duplicate of [Any sample MVC3 Wizard Apps (multi-step) (NO JQUERY)](http://stackoverflow.com/questions/8054640/any-sample-mvc3-wizard-apps-multi-step-no-jquery)
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