WCF RIA:LoadOperation 不刷新数据 [英] WCF RIA : LoadOperation Not Refreshing Data

问题描述

我有以下代码:

LoadOperationClarificationsLP = context.Load(context.GetClearificationsQuery().Where(o => o.ProjectID == ((App)Application.Current).Project.ProjectID).OrderBy(o => o.RaisedOn));ClearificationsLP.Completed += delegate {//Stuff };

当我第二次执行这个语句时，它没有从数据库中获取新的更改??

有什么想法吗?

谢谢，

瑞克

解决方案

试试这个:(我把 GetClearifictionsQuery 打出来只是为了让代码更清晰，是你要注意的加载行为)

<前><代码>var query = context.GetClearificationsQuery().Where((o => o.ProjectID == ((App)Application.Current).Project.ProjectID).OrderBy(o => o.RaisedOn));LoadOperation ClarificationsLP = context.Load(query, LoadBehavior.MergeIntoCurrent);ClearificationsLP.Completed += delegate {//Stuff };

此外，请查看此处以确保您选择了正确的 LoadBehavior(有 3 个):

http://msdn.microsoft.com/en-us/library/system.servicemodel.domainservices.client.loadbehavior(v=VS.91).aspx

默认行为(如果你没有通过)是 LoadBehavior.KeepCurrent，我认为这解释了你得到的行为.

I have the following code:

LoadOperation<Clarifications> ClarificationsLP = context.Load(context.GetClearificationsQuery().Where(o => o.ProjectID == ((App)Application.Current).Project.ProjectID).OrderBy(o => o.RaisedOn));
ClearificationsLP.Completed += delegate {//Stuff };

When I execute this statement the second time, it does not pick up new changes from the database??

Any Idea?

Thanks,

Rick

解决方案

Try this: (I broke out the GetClearifictionsQuery just to make the code more clear, it's the load behavior that you want to pay attention to)

var query = context.GetClearificationsQuery().Where((o => o.ProjectID == ((App)Application.Current).Project.ProjectID).OrderBy(o => o.RaisedOn));
LoadOperation ClarificationsLP = context.Load(query, LoadBehavior.MergeIntoCurrent);
ClearificationsLP.Completed += delegate {//Stuff };

Also, have a look here to make sure that you are choosing the correct LoadBehavior (there are 3):

http://msdn.microsoft.com/en-us/library/system.servicemodel.domainservices.client.loadbehavior(v=VS.91).aspx

The default behavior (if you don't pass one) is LoadBehavior.KeepCurrent, which I think explains the behavior that you are getting.

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