vb.net：錯誤從JSON收集數據到不同形式/線程的數據網格

Question

我想從JSON API中檢索數據並在加載時執行其他任務。 我已經寫代碼的成功在表單模塊

Public Sub aquiredata(mygrid As DataGridView, sql As String, tablename As String) 

    Dim table As DataTable 
    Dim thread1 As New Thread(
     Sub() 
      Try 
       Dim json As String = New System.Net.WebClient().DownloadString("http://ratnt.com/api.php/" & _ 
     tablename & "?query=" & Chr(34) & sql & Chr(34) & "&token=" & My.Settings.token) ' 
        table = JsonConvert.DeserializeObject(Of DataTable)(json) 
        MsgBox("table done") 
       Finally 
        Invoke(Sub() 
          mygrid.DataSource = table 
         End Sub) 
       End Try 
      End Sub 
     ) 
     thread1.Start() 
    End Sub 

但是當我從另一種形式與形式的DataGrid中調用它，它顯示

"An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll 

Additional information: Invoke or BeginInvoke cannot be called on a control until the window handle has been created." 

（PS我與BackgroundWorker的嘗試，但原因是我避免了它對每一個表格都是重複的，因爲解析結果只能通過RunWorkerCompleted事件完成。）

Answer 1

我錯過了很簡單的東西 這是消息中的基礎...

Invoke or BeginInvoke cannot be called on a control until the window handle has been created 

所以只是略有變化 mygrid.invoke，而不是隻invoke是 工作。

謝謝