在Silverlight 4插入后无法刷新/更新数据网格 [英] Unable to refresh/update data grid after insert in Silverlight 4

问题描述

我正在创建一个主版本的silverlight页面，并且在插入新的记录后更新datagrid时遇到麻烦。在页面顶部，我有文本框输入信息，当用户点击保存我想要的信息自动更新在数据库中，并显示在datagrid，而不刷新屏幕。

I am creating a master detials silverlight page and am having trouble updating the datagrid after inserting a new record. On the top of the page I have text boxes to enter information, when a user clicks on save I would like the information automatically updated in the database and displayed on the datagrid without refreshing the screen.

我可以将信息保存到数据库中，而不用担心数据网格会随着新的更改而被刷新。

I am able to save the information to the db with no problems its just trying to get the datagrid to refresh with the new changes.

SAVE按钮的一些代码如下：

Some of my code behind for the SAVE button is below:

ViewModel.UpdateWorkflow(summary, reason, Email);
LoadOperation<Document> lo = _Context.Load<Document>(_Context.GetDocumentsQuery(_DocID), rtRefresh, null);

rtRefresh的代码：

The code for rtRefresh:

private void rtRefresh(LoadOperation<Document> oLoadOperation)
    {            
        if (oLoadOperation.IsComplete)
        {                                                         
            ViewModel.GetDocuments(_DocID);
        }
    }

我将xml文件中的ViewModel设置为： / p>

I set the ViewModel in the xaml file as:

<controls:ChildWindow.Resources>
    <viewModel:DocumentChildWindowViewModel x:Key="ViewModel" />
</controls:ChildWindow.Resources>

代码隐藏中的ViewModel：

And the ViewModel in the code-behind:

ViewModel = Resources["ViewModel"] as DocumentChildWindowViewModel;

任何帮助不胜感激，谢谢。

Any help would be appreciated, thank you.

推荐答案

在我的ViewModel中，我最初创建一个新的DomainContext（）：

In my ViewModel I initially create a new DomainContext():

public DocumentWindowViewModel()
    {
        _Context = new appDomainContext();                       
        WireCommands();
    }

最后我必须将以下行复制到我的查询中：

I ended up having to copy the following line to my query:

_Context = new appDomainContext();

并粘贴到从数据库中获取值的函数：

And paste to the function that grabs the values from the database:

public void GetDocuments(int dID)
    {           
            _Context = new appDomainContext();  //ADDED THIS LINE TO FIX MY ISSUE                              
            _Context.Load(_Context.GetDocumentsQuery(dID), dlo =>
                {
                    DocumentsView = dlo.Entities;                                                
                }, null);                                
        }
    }

_Context保留旧值。这清除了_Context，并允许我在_Context中获取更新的数据。

the _Context was keeping old values. This cleared the _Context and allowed me to have the updated data in the _Context.

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