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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / Retrieving Guid of a l...
Microsoft Dynamics CRM (Archived)

Retrieving Guid of a lookup field

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Posted on by jma728 60

I am looking for a c# code to get the GUID of a lookup field.  This should be a generic code to accommodate any entity. 

Following is the scenario.

Need to create a lead  from a external web form. In web form  Nationality is provided as Text.   This text needs to be translated to   GUID  to add lookup field in the lead form.  

What I need a function which  receive parameter Lookup table, lookupGUIDcolumnName, and LookupTextColumnName.

eg: Lookup table = crm_nationality

     lookupGUIDcolumnName= crm_nationalityId

     LookupTextColumnName = crm_nationalityText

Any help is greatly appreciated. 

                   

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  • Verified answer
    David Jennaway Profile Picture
    David Jennaway 14,065 on at
    RE: Retrieving Guid of a lookup field

    You can do this using QueryByAttribute to get the GUID of a record based on matching on a field value. It would look something like this:

    You'll then need to check how many records are returned - ideally it would be one, but you should handle the scenarios of 0 records (no match), or multiple records (duplicates). If duplicates are possible, you can use the Orders property to specify the order

    QueryByAttribute qa = new QueryByAttribute(LookupTable);
qa.ColumnSet = new ColumnSet(LookupTextColumnName, LookupGUIDcolumnName);
//  Attribute to query.
qa.Attributes.AddRange(LookupTextColumnName);
//  Value of queried attribute to return.
qa.Values.AddRange(LookupTextValue);
EntityCollection ec = _service.RetrieveMultiple(qa);


  • jma728 Profile Picture
    jma728 60 on at
    RE: Retrieving Guid of a lookup field

    Hi David,

    The code you provided is worked well for me.  Thanks a lot.

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