How to avoid duplicates when creating records using Web API (C#) ?

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Posted on by Ravitheja J

When I try to create a duplicate in the CRM web application I am getting a pop-up indicating that I am trying to create a duplicate record. However, if the create using Web API (C#) from a .Net application then by default, the duplicate record is getting created without any warning.

Here is the sample code we are using to using to create a record using Web API

 JObject accountRecord = new JObject();
            accountRecord.Add("name", "JKC");
            accountRecord.Add("accountnumber", "00112233");

            HttpRequestMessage createAccountReq =
               new HttpRequestMessage(HttpMethod.Post, getVersionedWebAPIPath() + "accounts");

            createAccountReq.Content = new StringContent(accountRecord.ToString(),
                Encoding.UTF8, "application/json");

            HttpResponseMessage createAccountRes =
                await httpClient.SendAsync(createAccountReq);

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Verified answer

Guido Preite 54,086 Moderator on at

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if you want to avoid duplicates create an alternate key connected to your unique attribute

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a33ik 84,331 Most Valuable Professional on at

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Hello,

To turn on duplicates validation using webapi you should add new header "MSCRM.SuppressDuplicateDetection" to request with value "false".

That should resolve your ussue.

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