本文整理汇总了C#中System.Data.Objects.ObjectContext.SaveChanges方法的典型用法代码示例。如果您正苦于以下问题：C# ObjectContext.SaveChanges方法的具体用法？C# ObjectContext.SaveChanges怎么用？C# ObjectContext.SaveChanges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.ObjectContext的用法示例。
在下文中一共展示了ObjectContext.SaveChanges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
//引入命名空间
using (AdventureWorksEntities context =
new AdventureWorksEntities())
{
try
{
// Perform an operation with a high-level of concurrency.
// Change the status of all orders without an approval code.
ObjectQuery<SalesOrderHeader> orders =
context.SalesOrderHeaders.Where(
"it.CreditCardApprovalCode IS NULL").Top("100");
foreach (SalesOrderHeader order in orders)
{
// Reset the order status to 4 = Rejected.
order.Status = 4;
}
try
{
// Try to save changes, which may cause a conflict.
int num = context.SaveChanges();
Console.WriteLine("No conflicts. " +
num.ToString() + " updates saved.");
}
catch (OptimisticConcurrencyException)
{
// Resolve the concurrency conflict by refreshing the
// object context before re-saving changes.
context.Refresh(RefreshMode.ClientWins, orders);
// Save changes.
context.SaveChanges();
Console.WriteLine("OptimisticConcurrencyException "
+ "handled and changes saved");
}
foreach (SalesOrderHeader order in orders)
{
Console.WriteLine("Order ID: " + order.SalesOrderID.ToString()
+ " Order status: " + order.Status.ToString());
}
}
catch (UpdateException ex)
{
Console.WriteLine(ex.ToString());
}
}