批量更新強類型數據集？

Question

是否可以在強類型數據集中進行批量更新？一旦創建強類型數據集，UpdateBatchSize似乎不是一個選項。

Answer 1

您是否嘗試將此屬性添加到DataAdapter？擴展自動生成適配器類與屬性的UpdateBatchSize，例如（ 沒有測試尚未 ）：

Namespace DataSet1TableAdapters 
    Partial Public Class AddressTableAdapter 
     Public Property UpdateBatchSize() As Integer 
      Get 
       Return Me.Adapter.UpdateBatchSize 
      End Get 
      Set(ByVal value As Integer) 
       Me.Adapter.UpdateBatchSize = value 
       If value <> 1 Then 
        Me.Adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.None 
        Me.Adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None 
        Me.Adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.None 
       Else 
        Me.Adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord 
        Me.Adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord 
        Me.Adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord 
       End If 
      End Set 
     End Property 
    End Class 
End Namespace 

看一看到自動生成designer.cs/vb你要擴展的命名空間和部分適配器類的名稱使用批量更新功能並將它們放入與數據集名稱相同但沒有designer的文件中。如果你不能跟着我，看看here。

C＃

namespace DataSet1TableAdapters 
{ 
    public partial class AddressTableAdapter 
    { 
     public int UpdateBatchSize { 
      get { return this.Adapter.UpdateBatchSize; } 
      set { 
       this.Adapter.UpdateBatchSize = value; 
       if (value != 1) { 
        this.Adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.None; 
        this.Adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None; 
        this.Adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.None; 
       } else { 
        this.Adapter.UpdateCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord; 
        this.Adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord; 
        this.Adapter.DeleteCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord; 
       } 
      } 
     } 
    } 
} 

如果這樣的作品 ，它只能說明我的方式，因爲你不能直接改變自動生成的文件，因爲這將是改變自動再生。

編輯：在讀取this後，我更改了上面的代碼以相應地設置UpdatedRowSource屬性。

與下面的代碼進行測試：

Dim stopWatch As New Stopwatch 
Dim da As New DataSet1TableAdapters.AddressTableAdapter 
Dim tblAllAdresses As New DataSet1.AddressDataTable 
Dim tsBS1, tsBS0 As TimeSpan 

da.Fill(tblAllAdresses) 

da.UpdateBatchSize = 1 
For Each adrr As DataSet1.AddressRow In tblAllAdresses 
    adrr.ModifiedDate = Date.Now 
Next 
stopWatch.Start() 
Dim addressesChanged As Int32 = da.Update(tblAllAdresses) 
stopWatch.Stop() 
tsBS1 = stopWatch.Elapsed 

da.UpdateBatchSize = 0 '0 means maximum server can handle' 
For Each adrr As DataSet1.AddressRow In tblAllAdresses 
    adrr.ModifiedDate = Date.Now 
Next 
stopWatch.Restart() 
addressesChanged = da.Update(tblAllAdresses) 
stopWatch.Stop() 
tsBS0 = stopWatch.Elapsed 

Console.WriteLine("tsBS1: " & tsBS1.Minutes & ":" & tsBS1.Seconds & ":" & tsBS1.Milliseconds) '12 seconds' 
Console.WriteLine("tsBS0: " & tsBS0.Minutes & ":" & tsBS0.Seconds & ":" & tsBS0.Milliseconds) '9 seconds(on localhost!)'