在Silverlight 4 RC应用程序中连接域上下文并手动加载数据

答案很简单。数据在加载时立即被查询。虽然有些应用程序将按程序处理此问题,但Silverlight似乎没有等到加载数据后再继续。所以我做了如下工作:

public void LoadCustomerInformation()
{
     //Load the Query
     var loadOperation = _umsDomainContext.Load<UMOption>(_umsDomainContext.GetUMOptionsQuery());
     //Create a event handler to run after the data is fully loaded.
     loadOperation.Completed += new EventHandler(loadOperation_Completed);
}

void loadOperation_Completed(object sender, EventArgs e)
        {
            var name = (from n in _umsDomainContext.UMOptions
                       select n.DistrictName).First();

            var street1 = from c in _umsDomainContext.UMOptions
                          select c.Address1;

            var street2 = from c in _umsDomainContext.UMOptions
                          select c.Address2;

            var city = from c in _umsDomainContext.UMOptions
                       select c.City;

            var zip = from c in _umsDomainContext.UMOptions
                      select c.Zip;

            //Other code to work with the data, etc...
        }