SqlBulkCopy.SqlRowsCopied SqlBulkCopy.SqlRowsCopied SqlBulkCopy.SqlRowsCopied SqlBulkCopy.SqlRowsCopied Event

Definição

Ocorre sempre que o número de linhas especificado pela propriedade NotifyAfter foram processadas.Occurs every time that the number of rows specified by the NotifyAfter property have been processed.

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 

Exemplos

O aplicativo de console a seguir demonstra como carregar dados usando uma conexão que já está aberto em massa.The following console application demonstrates how to bulk load data using a connection that is already open. O NotifyAfter propriedade é definida para que o manipulador de eventos é chamado depois que cada 50 linhas copiadas para a tabela.The NotifyAfter property is set so that the event handler is called after every 50 rows copied to the table.

Neste exemplo, a conexão pela primeira vez é usado para ler dados de uma tabela do SQL Server para um SqlDataReader instância.In this example, the connection is first used to read data from a SQL Server table to a SqlDataReader instance. Observe que os dados de origem não precisam estar localizado no SQL Server; Você pode usar qualquer fonte de dados que pode ser lidos para um IDataReader ou carregados para um DataTable.Note that the source data does not have to be located on SQL Server; you can use any data source that can be read to an IDataReader or loaded to a DataTable.

Importante

Este exemplo não será executado, a menos que você criou as tabelas de trabalho conforme descrito em configuração de exemplo de cópia em massa.This sample will not run unless you have created the work tables as described in Bulk Copy Example Setup. Esse código é fornecido para demonstrar a sintaxe para usar SqlBulkCopy somente.This code is provided to demonstrate the syntax for using SqlBulkCopy only. Se as tabelas de origem e destino estiverem na mesma instância do SQL Server, é mais fácil e rápido para usar um Transact-SQL INSERT … SELECT instrução para copiar os dados.If the source and destination tables are in the same SQL Server instance, it is easier and faster to use a Transact-SQL INSERT … SELECT statement to copy the data.

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

Comentários

Observe que as configurações de NotifyAfter e BatchSize são independentes.Note that the settings of NotifyAfter and BatchSize are independent. Recebimento de uma SqlRowsCopied eventos não significa que todas as linhas foram enviadas para o servidor ou confirmadas.Receipt of a SqlRowsCopied event does not imply that any rows have been sent to the server or committed.

Você não pode chamar SqlBulkCopy.Close (Close) ou SqlConnection.Close (Close) desse evento.You cannot call SqlBulkCopy.Close (Close) or SqlConnection.Close (Close) from this event. Essa ação fará uma InvalidOperationException que está sendo gerada e o SqlBulkCopy estado do objeto não será alterado.Doing this will cause an InvalidOperationException being thrown, and the SqlBulkCopy object state will not change. Se o usuário deseja cancelar a operação do evento, o Abort propriedade do SqlRowsCopiedEventArgs pode ser usado.If the user wants to cancel the operation from the event, the Abort property of the SqlRowsCopiedEventArgs can be used. (Consulte transações e operações de cópia em massa para obter exemplos que usam o Abort propriedade.)(See Transaction and Bulk Copy Operations for examples that use the Abort property.)

Nenhuma ação, como atividade de transação, é suportada na conexão durante a execução da operação de cópia em massa, e é recomendável que você não use a mesma conexão usada durante o SqlRowsCopied eventos.No action, such as transaction activity, is supported in the connection during the execution of the bulk copy operation, and it is recommended that you not use the same connection used during the SqlRowsCopied event. No entanto, você pode abrir uma conexão diferente.However, you can open a different connection.

Aplica-se a

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