使用 wcf ria 服务将内容从数据库添加到 silver light 控件
我试图从数据库中检索字符串，并在加载之前将其作为内容添加到页面上的控件中（有点像自定义本地化）。我使用 ria 服务从数据库中检索字符串，如下所示：
**
Web.DomainService1 context = new Web.DomainService1();
LoadOperation<Web.LocalizationTab>LoadOp=context.Load(context.GetLocalizationTabsQuery(currentCulture, moduleName));
Dictionary<string, string> localizationDictonary = new Dictionary<string, string>();
List<Web.LocalizationTab> localList = new List<Web.LocalizationTab>();
LoadOp.Completed += (s, e) =>
{
localList = LoadOp.Entities.ToList<Web.LocalizationTab>();
//System.Windows.MessageBox.Show(localList.Count.ToString());
foreach (Web.LocalizationTab item in localList)
{
// var control = this.FindName(item.Control_ID.ToString());
if (!localizationDictonary.ContainsKey(item.Control_ID))
{
localizationDictonary.Add(item.Control_ID, item.Control_Text);
}
}
};**
这段代码位于名为utilities.cs 的单独类中。 现在在我的 Mainpage.xaml.cs 中，我需要获取带有值的字典，然后使用字典中的字符串设置控件。 我的问题是，当我在 Mainpage.xaml.cs 的构造函数中执行以下操作时：
utilities.getDict(ModuleName);
button1.Content = localizationDictonary["button1"].ToString();
我收到一个异常，因为字典当时不包含值。从数据库获取数据的加载完成事件仅在之后触发我的构造函数已退出。现在我该如何在这个特定的场景中自动设置我的控件？
I am trying to retrieve strings from the database and add it as content to the controls on my page before it loads(somewhat like a custom localization). I retrieve my strings from the database uing ria services as follows:
**
Web.DomainService1 context = new Web.DomainService1();
LoadOperation<Web.LocalizationTab>LoadOp=context.Load(context.GetLocalizationTabsQuery(currentCulture, moduleName));
Dictionary<string, string> localizationDictonary = new Dictionary<string, string>();
List<Web.LocalizationTab> localList = new List<Web.LocalizationTab>();
LoadOp.Completed += (s, e) =>
{
localList = LoadOp.Entities.ToList<Web.LocalizationTab>();
//System.Windows.MessageBox.Show(localList.Count.ToString());
foreach (Web.LocalizationTab item in localList)
{
// var control = this.FindName(item.Control_ID.ToString());
if (!localizationDictonary.ContainsKey(item.Control_ID))
{
localizationDictonary.Add(item.Control_ID, item.Control_Text);
}
}
};**
This piece of code is in a separate class called utilities.cs.
now in my Mainpage.xaml.cs i need to get this dictionary with values and then set the controls with the strings from the dictionary.
my problem is that when i do the following in the constructor of Mainpage.xaml.cs:
utilities.getDict(ModuleName);
button1.Content = localizationDictonary["button1"].ToString();
i get an exception as the dictionary doesnt contain values at that point of time.. The load completed event of getting data from the database gets fired only after my constructor is exited. now how do i go about setting my controls automatically in this particular scenario??
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尝试在 Silverlight 应用程序类 启动事件。这应该确保您的词典已加载（并且可以放置在应用程序资源中以便在应用程序的其他位置检索）。
Try loading your dictionary in the Silverlight Application class StartUp event. This should ensure that your Dictionary is loaded (and could be placed in the Application Resources for retrieval elsewhere in your application).
在实例化 MainPage 之前，您需要等待 GetLocalizationTabsQuery 完成。在 App.xaml.cs 文件中，您可以启动查询，添加查询完成处理程序，并且仅在调用查询完成处理程序时创建 MainPage。
You'll need to wait for the GetLocalizationTabsQuery to complete before instantiating your MainPage. In your App.xaml.cs file, you can start the query, add a query completed handler, and only create the MainPage when the query completed handler gets called.