How to get the option set from a field in an entity in CRM 2011 using crm sdk and C#

Question

How to get the option set from a field in an entity in CRM 2011 using crm sdk and C#? I just want to share with you guys a direct approach on getting the option set of a fie

Answer 1

This method needs the entity name, name of the field which contain the option set and the instantiated IOrganizationService.

using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Messages;
using Microsoft.Xrm.Sdk.Metadata;

    public void GetOptionSet(string entityName, string fieldName, IOrganizationService service)
            {
                RetrieveEntityRequest retrieveDetails = new RetrieveEntityRequest();
                retrieveDetails.EntityFilters = EntityFilters.All;
                retrieveDetails.LogicalName = entityName;

                RetrieveEntityResponse retrieveEntityResponseObj = (RetrieveEntityResponse)service.Execute(retrieveDetails);
                EntityMetadata metadata = retrieveEntityResponseObj.EntityMetadata;
                PicklistAttributeMetadata picklistMetadata = metadata.Attributes.FirstOrDefault(attribute => String.Equals(attribute.LogicalName, fieldName, StringComparison.OrdinalIgnoreCase)) as PicklistAttributeMetadata;
                OptionSetMetadata options = picklistMetadata.OptionSet;
                var optionlist = (from o in options.Options
                                   select new { Value = o.Value, Text = o.Label.UserLocalizedLabel.Label }).ToList();

                //from here you can do anything you want now with the optionlist

            }

Reference:
http://guruprasadcrm.blogspot.ae/2011/12/retrieve-optionset-text-in-crm-2011.html

I hope this will help some of you guys with your project.