Sets the state of an opportunity to Lost

Sets the state of an opportunity to Lost.

//# The following code example shows how to use the LoseOpportunity message.
// Set up the CRM service.
CrmAuthenticationToken token = new CrmAuthenticationToken();
// You can use enums.cs from the SDK\Helpers folder to get the enumeration for Active Directory authentication.
token.AuthenticationType = 0; 
token.OrganizationName = "AdventureWorksCycle";

CrmService service = new CrmService();
service.Url = "http://:/mscrmservices/2007/crmservice.asmx";
service.CrmAuthenticationTokenValue = token;
service.Credentials = System.Net.CredentialCache.DefaultCredentials;

//Set up the data required for this sample.

// Create an account for the opportunity's potential customer.
account potentialCustomer = new account();
potentialCustomer.name = "Adventure Works Cycle";

Guid createdAccountId = service.Create(potentialCustomer);

// Build a query for US Dollar currency.
QueryByAttribute dollarQuery = new QueryByAttribute();
dollarQuery.EntityName = EntityName.transactioncurrency.ToString();
dollarQuery.Attributes = new string[] { "currencyname" };
dollarQuery.Values = new string[] { "US Dollar" };
// Be aware that using AllColumns may adversely affect
// performance and cause unwanted cascading in subsequent 
// updates. A best practice is to retrieve the least amount of 
// data required.
dollarQuery.ColumnSet = new AllColumns();

// Create the US currency request.
RetrieveMultipleRequest dollarRequest = new RetrieveMultipleRequest();
dollarRequest.Query = dollarQuery;

// Get US currency to use in the opportunity.
RetrieveMultipleResponse dollarResponse = (RetrieveMultipleResponse)service.Execute(dollarRequest);
transactioncurrency usCurrency = (transactioncurrency)dollarResponse.BusinessEntityCollection.BusinessEntities[0];

// Create an opportunity.
opportunity loseOpportunity = new opportunity();
loseOpportunity.customerid = new Customer();
loseOpportunity.customerid.type = EntityName.account.ToString();
loseOpportunity.customerid.Value = createdAccountId;
loseOpportunity.name = "SDK Sample for LoseOpportunity Message";
loseOpportunity.transactioncurrencyid = new Lookup();
loseOpportunity.transactioncurrencyid.type = EntityName.transactioncurrency.ToString();
loseOpportunity.transactioncurrencyid.Value = usCurrency.transactioncurrencyid.Value;

Guid loseOpportunityId = service.Create(loseOpportunity);

// Create an opportunityclose object.
opportunityclose oppClose = new opportunityclose();

// Set the opportunityclose properties.
oppClose.subject = "SDK Sample for LoseOpportunity Message";

// Set the opportunityid to an existing opportunity.
oppClose.opportunityid = new Lookup();
oppClose.opportunityid.type = EntityName.opportunity.ToString();
oppClose.opportunityid.Value = loseOpportunityId;

// Create the request.
LoseOpportunityRequest loseOppReq = new LoseOpportunityRequest();
loseOppReq.OpportunityClose = oppClose;

// A status of -1 will have the platform set the status to the appropriate value.
loseOppReq.Status = -1;

// Execute the request.
service.Execute(loseOppReq);