我有一個項目設置 - 它是託管在ASP.Net站點中的Silverlight客戶端應用程序。它有一個ADO.Net實體框架來與SQL Server數據庫和ADO.Net數據服務進行通信。 我有一些麻煩讓我的異步CRUD Silverlight插入在我的數據庫上工作。第一種方法正常觸發並傳入URI。但是當「OnClientJobQueryComplete」方法觸發時,它失敗了大約5行,我不明白爲什麼。例外說「處理此請求時發生錯誤」。Silverlight - Crud插入失敗意外?
private void addStuff_Click(object sender, RoutedEventArgs e)
{
// Define a URI that returns the product with the specified ID.
Uri jobrefUri = new Uri(svcContext.BaseUri.AbsoluteUri
+ "/ClientJob(" + this.jobref.Text + ")");
// Begin a query operation retrieve the Product object
// that is required to add a link to the new Order_Detail.
svcContext.BeginExecute<ClientJob>(jobrefUri,
OnClientJobQueryCompleted,null);
}
private void OnClientJobQueryCompleted(IAsyncResult result)
{
// Use the Dispatcher to ensure that the
// asynchronous call returns in the correct thread.
Dispatcher.BeginInvoke(() =>
{
// Get the Product returned by the completed query.
IEnumerable<ClientJob> queryResult =
svcContext.EndExecute<ClientJob>(result);//**TRIES THIS BUT FAILS HERE
ClientJob returnedClientJob = queryResult.First();
// Get the currently selected order. (Create new Guid since not Northwind)
Guid g = Guid.NewGuid();
// Create a new Order_Details object with the supplied FK values.
Job newItem = Job.CreateJob(g);
//Job newItem = Job.CreateJob(g, returnedClientJob.JobRef);
jobsBindingCollection.Add(newItem);
// Add the new item to the context.
svcContext.AddToJob(newItem);
//// Add the relationship between the order and the new item.
//currentOrder.Order_Details.Add(newItem);
//svcContext.AddLink(currentOrder, "Order_Details", newItem);
//// Set the reference to the order and product from the item.
//newItem.Orders = currentOrder;
//svcContext.SetLink(newItem, "Orders", currentOrder);
// Add the relationship between the product and the new item.
returnedClientJob.Job.Add(newItem);
svcContext.AddLink(returnedClientJob, "Job", newItem);
// Set the reference to the product from the item.
newItem.ClientJob = returnedClientJob;
svcContext.SetLink(newItem, "ClientJob", returnedClientJob);
}
);
}
此代碼是從this使用Northwind數據庫的微軟教程中提取和修改的。由於我的數據庫與Northwind具有相似的結構,因此本教程中的所有其他代碼示例都能正常工作。我已經能夠實施RUD到目前爲止,但不是CRUD。
任何人都可以對這個問題有所瞭解嗎?
幫助非常感謝!
試過一個已經我怕,似乎並沒有讓:-( – Goober 2009-09-09 11:28:39