DataServiceContext.UpdateObject(Object) Method

public:
 void UpdateObject(System::Object ^ entity);

public void UpdateObject(object entity);

member this.UpdateObject : obj -> unit

Public Sub UpdateObject (entity As Object)

Parameters

Exceptions

Examples

The following example retrieves and modifies an existing object and then calls the UpdateObject method on the DataServiceContext to mark the item in the context as updated. An HTTP MERGE message is sent to the data service when SaveChanges is called. This example uses the DataServiceContext generated by the Add Service Reference tool based on the Northwind data service, which is created when you complete the WCF Data Services .

string customerId = "ALFKI";

// Create the DataServiceContext using the service URI.
NorthwindEntities context = new NorthwindEntities(svcUri);

// Get a customer to modify using the supplied ID.
var customerToChange = (from customer in context.Customers
 where customer.CustomerID == customerId
 select customer).Single();

// Change some property values.
customerToChange.CompanyName = "Alfreds Futterkiste";
customerToChange.ContactName = "Maria Anders";
customerToChange.ContactTitle = "Sales Representative";

try
{
 // Mark the customer as updated.
 context.UpdateObject(customerToChange);

 // Send the update to the data service.
 context.SaveChanges();
}
catch (DataServiceRequestException ex)
{
 throw new ApplicationException(
 "An error occurred when saving changes.", ex);
}

Dim customerId = "ALFKI"

' Create the DataServiceContext using the service URI.
Dim context = New NorthwindEntities(svcUri)

' Get a customer to modify using the supplied ID.
Dim customerToChange = (From customer In context.Customers
 Where customer.CustomerID = customerId
 Select customer).Single()

' Change some property values.
customerToChange.CompanyName = "Alfreds Futterkiste"
customerToChange.ContactName = "Maria Anders"
customerToChange.ContactTitle = "Sales Representative"

Try
 ' Mark the customer as updated.
 context.UpdateObject(customerToChange)

 ' Send the update to the data service.
 context.SaveChanges()
Catch ex As DataServiceRequestException
 Throw New ApplicationException(
 "An error occurred when saving changes.", ex)
End Try