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SqlBulkCopy.SqlRowsCopied 事件

定義

每次處理完 NotifyAfter 屬性指定的資料列數時就會發生。

public:
 event System::Data::SqlClient::SqlRowsCopiedEventHandler ^ SqlRowsCopied;
public event System.Data.SqlClient.SqlRowsCopiedEventHandler SqlRowsCopied;
member this.SqlRowsCopied : System.Data.SqlClient.SqlRowsCopiedEventHandler 
Public Custom Event SqlRowsCopied As SqlRowsCopiedEventHandler 

事件類型

範例

下列主控台應用程式示範如何使用已開啟的連接來大量載入數據。 屬性 NotifyAfter 會設定為在每 50 個數據列複製到數據表之後呼叫事件處理程式。

在此範例中,連接會先用來將數據從 SQL Server 數據表讀取到 SqlDataReader 實例。 請注意,源數據不一定位於 SQL Server;您可以使用可讀取至 或載入 至 IDataReaderDataTable的任何數據源。

重要

除非您已如大量複製範例設定中所述建立工作資料表,否則將不會執行此範例。 這個程式碼僅是為了示範使用 SqlBulkCopy 的語法而提供。 如果來源和目的地數據表位於相同的 SQL Server 實例中,使用 Transact-SQL INSERT ... SELECT 語句來複製數據會比較簡單且更快速。

using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = GetConnectionString();
        // Open a sourceConnection to the AdventureWorks database.
        using (SqlConnection sourceConnection =
                   new SqlConnection(connectionString))
        {
            sourceConnection.Open();

            // Perform an initial count on the destination table.
            SqlCommand commandRowCount = new SqlCommand(
                "SELECT COUNT(*) FROM " +
                "dbo.BulkCopyDemoMatchingColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            Console.WriteLine("NotifyAfter Sample");
            Console.WriteLine("Starting row count = {0}", countStart);

            // Get data from the source table as a SqlDataReader.
            SqlCommand commandSourceData = new SqlCommand(
                "SELECT ProductID, Name, " +
                "ProductNumber " +
                "FROM Production.Product;", sourceConnection);
            SqlDataReader reader =
                commandSourceData.ExecuteReader();

            // Create the SqlBulkCopy object using a connection string.
            // In the real world you would not use SqlBulkCopy to move
            // data from one table to the other in the same database.
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoMatchingColumns";

                // Set up the event handler to notify after 50 rows.
                bulkCopy.SqlRowsCopied +=
                    new SqlRowsCopiedEventHandler(OnSqlRowsCopied);
                bulkCopy.NotifyAfter = 50;

                try
                {
                    // Write from the source to the destination.
                    bulkCopy.WriteToServer(reader);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
                finally
                {
                    // Close the SqlDataReader. The SqlBulkCopy
                    // object is automatically closed at the end
                    // of the using block.
                    reader.Close();
                }
            }

            // Perform a final count on the destination
            // table to see how many rows were added.
            long countEnd = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            Console.WriteLine("Ending row count = {0}", countEnd);
            Console.WriteLine("{0} rows were added.", countEnd - countStart);
            Console.WriteLine("Press Enter to finish.");
            Console.ReadLine();
        }
    }

    private static void OnSqlRowsCopied(
        object sender, SqlRowsCopiedEventArgs e)
    {
        Console.WriteLine("Copied {0} so far...", e.RowsCopied);
    }
    private static string GetConnectionString()
        // To avoid storing the sourceConnection string in your code,
        // you can retrieve it from a configuration file.
    {
        return "Data Source=(local); " +
            " Integrated Security=true;" +
            "Initial Catalog=AdventureWorks;";
    }
}
Imports System.Data.SqlClient

Module Module1
    Sub Main()
        Dim connectionString As String = GetConnectionString()

        ' Open a connection to the AdventureWorks database.
        Using sourceConnection As SqlConnection = _
           New SqlConnection(connectionString)
            sourceConnection.Open()

            ' Perform an initial count on the destination table.
            Dim commandRowCount As New SqlCommand( _
            "SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            Console.WriteLine("NotifyAfter Sample")
            Console.WriteLine("Starting row count = {0}", countStart)

            ' Get data from the source table as a SqlDataReader.
            Dim commandSourceData As SqlCommand = New SqlCommand( _
               "SELECT ProductID, Name, ProductNumber " & _
               "FROM Production.Product;", sourceConnection)
            Dim reader As SqlDataReader = commandSourceData.ExecuteReader

            ' Create the SqlBulkCopy object using a connection string. 
            ' In the real world you would not use SqlBulkCopy to move
            ' data from one table to the other in the same database.
            Using bulkCopy As SqlBulkCopy = _
              New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"

                ' Set up the event handler to notify after 50 rows.
                AddHandler bulkCopy.SqlRowsCopied, AddressOf OnSqlRowsCopied
                bulkCopy.DestinationTableName = _
                 "dbo.BulkCopyDemoMatchingColumns"
                bulkCopy.NotifyAfter = 50

                Try
                    ' Write from the source to the destination.
                    bulkCopy.WriteToServer(reader)

                Catch ex As Exception
                    Console.WriteLine(ex.Message)

                Finally
                    ' Close the SqlDataReader. The SqlBulkCopy
                    ' object is automatically closed at the end
                    ' of the Using block.
                    reader.Close()
                End Try
            End Using

            ' Perform a final count on the destination table
            ' to see how many rows were added.
            Dim countEnd As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            Console.WriteLine("Ending row count = {0}", countEnd)
            Console.WriteLine("{0} rows were added.", countEnd - countStart)

            Console.WriteLine("Press Enter to finish.")
            Console.ReadLine()
        End Using
    End Sub

    Private Sub OnSqlRowsCopied(ByVal sender As Object, _
        ByVal args As SqlRowsCopiedEventArgs)
        Console.WriteLine("Copied {0} so far...", args.RowsCopied)
    End Sub

    Private Function GetConnectionString() As String
        ' To avoid storing the sourceConnection string in your code, 
        ' you can retrieve it from a configuration file. 
        Return "Data Source=(local);" & _
            "Integrated Security=true;" & _
            "Initial Catalog=AdventureWorks;"
    End Function
End Module

備註

請注意, 和 BatchSizeNotifyAfter設定是獨立的。 SqlRowsCopied收到事件並不表示任何數據列都已傳送至伺服器或已認可。

您無法從這個事件呼叫 SqlBulkCopy.Close (Close) 或 SqlConnection.Close (Close) 。 這樣做會導致 InvalidOperationException 擲回 ,而且 SqlBulkCopy 對象狀態不會變更。 如果使用者想要從 事件取消作業, Abort 可以使用 的 SqlRowsCopiedEventArgs 屬性。 (如需使用 Abort property.) 的範例,請參閱交易和大量複製作業

在大量複製作業執行期間,連線不支援任何動作,例如交易活動,而且建議您不要在事件期間 SqlRowsCopied 使用相同的連接。 不過,您可以開啟不同的連線。

適用於

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