本文整理汇总了C#中System.Data.Objects.ObjectContext.Connection属性的典型用法代码示例。如果您正苦于以下问题：C# ObjectContext.Connection属性的具体用法？C# ObjectContext.Connection怎么用？C# ObjectContext.Connection使用的例子？那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Data.Objects.ObjectContext的用法示例。
在下文中一共展示了ObjectContext.Connection属性的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: EntityConnection
// Define the order ID for the order we want.
int orderId = 43680;
// Create an EntityConnection.
EntityConnection conn =
new EntityConnection("name=AdventureWorksEntities");
// Create a long-running context with the connection.
AdventureWorksEntities context =
new AdventureWorksEntities(conn);
try
{
// Explicitly open the connection.
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
// Execute a query to return an order.
SalesOrderHeader order =
context.SalesOrderHeaders.Where(
"it.SalesOrderID = @orderId", new ObjectParameter("orderId", orderId))
.Execute(MergeOption.AppendOnly).First();
// Change the status of the order.
order.Status = 1;
// You do not have to call the Load method to load the details for the order,
// because lazy loading is set to true
// by the constructor of the AdventureWorksEntities object.
// With lazy loading set to true the related objects are loaded when
// you access the navigation property. In this case SalesOrderDetails.
// Delete the first item in the order.
context.DeleteObject(order.SalesOrderDetails.First());
// Save changes.
if (0 < context.SaveChanges())
{
Console.WriteLine("Changes saved.");
}
// 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 = 1,
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);
// Save changes again.
if (0 < context.SaveChanges())
{
Console.WriteLine("Changes saved.");
}
}
catch (InvalidOperationException ex)
{
Console.WriteLine(ex.ToString());
}
finally
{
// Explicitly dispose of the context and the connection.
context.Dispose();
conn.Dispose();
}