本文整理汇总了C#中System.Data.Objects.ObjectStateManager.GetObjectStateEntry方法的典型用法代码示例。如果您正苦于以下问题：C# ObjectStateManager.GetObjectStateEntry方法的具体用法？C# ObjectStateManager.GetObjectStateEntry怎么用？C# ObjectStateManager.GetObjectStateEntry使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.Objects.ObjectStateManager的用法示例。
在下文中一共展示了ObjectStateManager.GetObjectStateEntry方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: using
// Specify the order to update.
int orderId = 43680;
using (AdventureWorksEntities context =
new AdventureWorksEntities())
{
try
{
var order = (from o in context.SalesOrderHeaders
where o.SalesOrderID == orderId
select o).First();
// Change the status of an existing order.
order.Status = 1;
// Delete the first item in the order.
context.DeleteObject(order.SalesOrderDetails.First());
// Create a new SalesOrderDetail object.
// You can use the static CreateObjectName method (the Entity Framework
// adds this method to the generated entity types) instead of the new operator:
// SalesOrderDetail.CreateSalesOrderDetail(1, 0, 2, 750, 1, (decimal)2171.2942, 0, 0,
// Guid.NewGuid(), DateTime.Today));
SalesOrderDetail detail = new SalesOrderDetail
{
SalesOrderID = 0,
SalesOrderDetailID = 0,
OrderQty = 2,
ProductID = 750,
SpecialOfferID = 1,
UnitPrice = (decimal)2171.2942,
UnitPriceDiscount = 0,
LineTotal = 0,
rowguid = Guid.NewGuid(),
ModifiedDate = DateTime.Now
};
order.SalesOrderDetails.Add(detail);
// Get the ObjectStateEntry for the order.
ObjectStateEntry stateEntry =
context.ObjectStateManager
.GetObjectStateEntry(order);
Console.WriteLine("State before SaveChanges() is called: {0}",
stateEntry.State.ToString());
// Save changes in the object context to the database.
int changes = context.SaveChanges();
Console.WriteLine("State after SaveChanges() is called: {0}",
stateEntry.State.ToString());
Console.WriteLine(changes.ToString() + " changes saved!");
Console.WriteLine("Updated item for order ID: "
+ order.SalesOrderID.ToString());
// Iterate through the collection of SalesOrderDetail items.
foreach (SalesOrderDetail item in order.SalesOrderDetails)
{
Console.WriteLine("Item ID: "
+ item.SalesOrderDetailID.ToString() + " Product: "
+ item.ProductID.ToString() + " Quantity: "
+ item.OrderQty.ToString());
}
}
catch (UpdateException ex)
{
Console.WriteLine(ex.ToString());
}
}