Bagikan melalui

SqlBulkCopyColumnMappingCollection.Add Metode

  • Referensi

Definisi

Ruang nama:
System.Data.SqlClient
Rakitan:
System.Data.SqlClient.dll
Rakitan:
System.Data.dll
Rakitan:
netstandard.dll, System.Data.SqlClient.dll
Paket:
System.Data.SqlClient v4.8.6

Menambahkan baru SqlBulkCopyColumnMapping ke SqlBulkCopyColumnMappingCollection.

Overload

Add(SqlBulkCopyColumnMapping)

Menambahkan pemetaan yang ditentukan ke SqlBulkCopyColumnMappingCollection.
Add(Int32, Int32)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan ordinal untuk menentukan kolom sumber dan tujuan.
Add(Int32, String)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan ordinal untuk kolom sumber dan string untuk kolom tujuan.
Add(String, Int32)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan nama kolom untuk menjelaskan kolom sumber dan ordinal untuk menentukan kolom tujuan.
Add(String, String)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan nama kolom untuk menentukan kolom sumber dan tujuan.

Add(SqlBulkCopyColumnMapping)

Menambahkan pemetaan yang ditentukan ke SqlBulkCopyColumnMappingCollection.

public:
 System::Data::SqlClient::SqlBulkCopyColumnMapping ^ Add(System::Data::SqlClient::SqlBulkCopyColumnMapping ^ bulkCopyColumnMapping);
public System.Data.SqlClient.SqlBulkCopyColumnMapping Add (System.Data.SqlClient.SqlBulkCopyColumnMapping bulkCopyColumnMapping);
member this.Add : System.Data.SqlClient.SqlBulkCopyColumnMapping -> System.Data.SqlClient.SqlBulkCopyColumnMapping
Public Function Add (bulkCopyColumnMapping As SqlBulkCopyColumnMapping) As SqlBulkCopyColumnMapping

Parameter

bulkCopyColumnMapping
SqlBulkCopyColumnMapping

Objek SqlBulkCopyColumnMapping yang menjelaskan pemetaan yang akan ditambahkan ke koleksi.

Mengembalikan

SqlBulkCopyColumnMapping

Objek SqlBulkCopyColumnMapping.

Contoh

Contoh berikut menyalin data secara massal dari tabel sumber di database sampel AdventureWorks ke tabel tujuan dalam database yang sama. Meskipun jumlah kolom di tujuan cocok dengan jumlah kolom dalam sumber, nama kolom dan posisi ordinal tidak cocok. SqlBulkCopyColumnMapping objek digunakan untuk membuat peta kolom untuk salinan massal.

Penting

Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyiapan Contoh Salinan Massal. Kode ini disediakan untuk mendemonstrasikan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin 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.BulkCopyDemoDifferentColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            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();

            // Set up the bulk copy object.
            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";

                // Set up the column mappings by name.
                SqlBulkCopyColumnMapping mapID =
                    new SqlBulkCopyColumnMapping("ProductID", "ProdID");
                bulkCopy.ColumnMappings.Add(mapID);

                SqlBulkCopyColumnMapping mapName =
                    new SqlBulkCopyColumnMapping("Name", "ProdName");
                bulkCopy.ColumnMappings.Add(mapName);

                SqlBulkCopyColumnMapping mapMumber =
                    new SqlBulkCopyColumnMapping("ProductNumber", "ProdNum");
                bulkCopy.ColumnMappings.Add(mapMumber);

                // Write from the source to the destination.
                try
                {
                    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 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.BulkCopyDemoDifferentColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            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

            ' Set up the bulk copy object.
            Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = _
                "dbo.BulkCopyDemoDifferentColumns"

                ' Set up the column mappings by name.
                Dim mapID As New _
                  SqlBulkCopyColumnMapping("ProductID", "ProdID")
                bulkCopy.ColumnMappings.Add(mapID)

                Dim mapName As New _
                 SqlBulkCopyColumnMapping("Name", "ProdName")
                bulkCopy.ColumnMappings.Add(mapName)

                Dim mapMumber As New _
                 SqlBulkCopyColumnMapping("ProductNumber", "ProdNum")
                bulkCopy.ColumnMappings.Add(mapMumber)

                ' Write from the source to the destination.
                Try
                    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 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

Lihat juga

Berlaku untuk

Add(Int32, Int32)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan ordinal untuk menentukan kolom sumber dan tujuan.

public:
 System::Data::SqlClient::SqlBulkCopyColumnMapping ^ Add(int sourceColumnIndex, int destinationColumnIndex);
public System.Data.SqlClient.SqlBulkCopyColumnMapping Add (int sourceColumnIndex, int destinationColumnIndex);
member this.Add : int * int -> System.Data.SqlClient.SqlBulkCopyColumnMapping
Public Function Add (sourceColumnIndex As Integer, destinationColumnIndex As Integer) As SqlBulkCopyColumnMapping

Parameter

sourceColumnIndex
Int32

Posisi ordinal kolom sumber dalam sumber data.

destinationColumnIndex
Int32

Posisi ordinal kolom tujuan dalam tabel tujuan.

Mengembalikan

SqlBulkCopyColumnMapping

Pemetaan kolom.

Contoh

Contoh berikut menyalin data secara massal dari tabel sumber di database sampel AdventureWorks ke tabel tujuan dalam database yang sama. Meskipun jumlah kolom di tujuan cocok dengan jumlah kolom dalam sumber, nama kolom dan posisi ordinal tidak cocok. SqlBulkCopyColumnMapping objek digunakan untuk membuat peta kolom untuk salinan massal menggunakan posisi ordinal kolom sumber dan tujuan.

Penting

Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyiapan Contoh Salinan Massal. Kode ini disediakan untuk mendemonstrasikan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin 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.BulkCopyDemoDifferentColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            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();

            // Set up the bulk copy object.
            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";

                // The column order in the source doesn't match the order
                // in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add(0, 0);
                bulkCopy.ColumnMappings.Add(1, 2);
                bulkCopy.ColumnMappings.Add(2, 1);

                // Write from the source to the destination.
                try
                {
                    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 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.BulkCopyDemoDifferentColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            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

            ' Set up the bulk copy object.
            Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = _
                "dbo.BulkCopyDemoDifferentColumns"

                ' The column order in the source doesn't match the order 
                ' in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add(0, 0)
                bulkCopy.ColumnMappings.Add(1, 2)
                bulkCopy.ColumnMappings.Add(2, 1)

                ' Write from the source to the destination.
                Try
                    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 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

Keterangan

Pemetaan dalam koleksi harus seragam: baik semua pasangan bilangan bulat/bilangan bulat, semua pasangan string/string, semua pasangan bilangan bulat/string, atau semua pasangan string/bilangan bulat. Jika Anda mencoba menambahkan pemetaan yang berbeda dari yang lain yang sudah ada dalam koleksi, InvalidOperationException akan dilemparkan.

Lihat juga

Berlaku untuk

Add(Int32, String)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan ordinal untuk kolom sumber dan string untuk kolom tujuan.

public:
 System::Data::SqlClient::SqlBulkCopyColumnMapping ^ Add(int sourceColumnIndex, System::String ^ destinationColumn);
public System.Data.SqlClient.SqlBulkCopyColumnMapping Add (int sourceColumnIndex, string destinationColumn);
member this.Add : int * string -> System.Data.SqlClient.SqlBulkCopyColumnMapping
Public Function Add (sourceColumnIndex As Integer, destinationColumn As String) As SqlBulkCopyColumnMapping

Parameter

sourceColumnIndex
Int32

Posisi ordinal kolom sumber dalam sumber data.

destinationColumn
String

Nama kolom tujuan dalam tabel tujuan.

Mengembalikan

SqlBulkCopyColumnMapping

Pemetaan kolom.

Contoh

Contoh berikut menyalin data secara massal dari tabel sumber di database sampel AdventureWorks ke tabel tujuan dalam database yang sama. Meskipun jumlah kolom di tujuan cocok dengan jumlah kolom dalam sumber, nama kolom dan posisi ordinal tidak cocok. SqlBulkCopyColumnMapping objek digunakan untuk membuat peta kolom untuk salinan massal.

Penting

Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyiapan Contoh Salinan Massal. Kode ini disediakan untuk mendemonstrasikan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin 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.BulkCopyDemoDifferentColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            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();

            // Set up the bulk copy object.
            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";

                // The column order in the source doesn't match the order
                // in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add(0, "ProdID");
                bulkCopy.ColumnMappings.Add(1, "ProdName");
                bulkCopy.ColumnMappings.Add(2, "ProdNum");

                // Write from the source to the destination.
                try
                {
                    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 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.BulkCopyDemoDifferentColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            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

            ' Set up the bulk copy object.
            Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = _
                "dbo.BulkCopyDemoDifferentColumns"

                ' The column order in the source doesn't match the order 
                ' in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add(0, "ProdID")
                bulkCopy.ColumnMappings.Add(1, "ProdName")
                bulkCopy.ColumnMappings.Add(2, "ProdNum")

                ' Write from the source to the destination.
                Try
                    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 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

Keterangan

Pemetaan dalam koleksi harus seragam: baik semua pasangan bilangan bulat/bilangan bulat, semua pasangan string/string, semua pasangan bilangan bulat/string, atau semua pasangan string/bilangan bulat. Jika Anda mencoba menambahkan pemetaan yang berbeda dari yang lain yang sudah ada dalam koleksi, InvalidOperationException akan dilemparkan.

Lihat juga

Berlaku untuk

Add(String, Int32)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan nama kolom untuk menjelaskan kolom sumber dan ordinal untuk menentukan kolom tujuan.

public:
 System::Data::SqlClient::SqlBulkCopyColumnMapping ^ Add(System::String ^ sourceColumn, int destinationColumnIndex);
public System.Data.SqlClient.SqlBulkCopyColumnMapping Add (string sourceColumn, int destinationColumnIndex);
member this.Add : string * int -> System.Data.SqlClient.SqlBulkCopyColumnMapping
Public Function Add (sourceColumn As String, destinationColumnIndex As Integer) As SqlBulkCopyColumnMapping

Parameter

sourceColumn
String

Nama kolom sumber dalam sumber data.

destinationColumnIndex
Int32

Posisi ordinal kolom tujuan dalam tabel tujuan.

Mengembalikan

SqlBulkCopyColumnMapping

Pemetaan kolom.

Contoh

Contoh berikut menyalin data secara massal dari tabel sumber di database sampel AdventureWorks ke tabel tujuan dalam database yang sama. Meskipun jumlah kolom di tujuan cocok dengan jumlah kolom dalam sumber, nama kolom dan posisi ordinal tidak cocok. SqlBulkCopyColumnMapping objek digunakan untuk membuat peta kolom untuk salinan massal.

Penting

Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyiapan Contoh Salinan Massal. Kode ini disediakan untuk mendemonstrasikan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin 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.BulkCopyDemoDifferentColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            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();

            // Set up the bulk copy object.
            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";

                // The column order in the source doesn't match the order
                // in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add("ProductID", 0);
                bulkCopy.ColumnMappings.Add("ProductNumber", 1);
                bulkCopy.ColumnMappings.Add("Name", 2);

                // Write from the source to the destination.
                try
                {
                    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 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.BulkCopyDemoDifferentColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            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

            ' Set up the bulk copy object.
            Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = _
                "dbo.BulkCopyDemoDifferentColumns"

                ' The column order in the source doesn't match the order 
                ' in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add("ProductID", 0)
                bulkCopy.ColumnMappings.Add("ProductNumber", 1)
                bulkCopy.ColumnMappings.Add("Name", 2)

                ' Write from the source to the destination.
                Try
                    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 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

Keterangan

Pemetaan dalam koleksi harus seragam: baik semua pasangan bilangan bulat/bilangan bulat, semua pasangan string/string, semua pasangan bilangan bulat/string, atau semua pasangan string/bilangan bulat. Jika Anda mencoba menambahkan pemetaan yang berbeda dari yang lain yang sudah ada dalam koleksi, InvalidOperationException akan dilemparkan.

Lihat juga

Berlaku untuk

Add(String, String)

Membuat baru SqlBulkCopyColumnMapping dan menambahkannya ke koleksi, menggunakan nama kolom untuk menentukan kolom sumber dan tujuan.

public:
 System::Data::SqlClient::SqlBulkCopyColumnMapping ^ Add(System::String ^ sourceColumn, System::String ^ destinationColumn);
public System.Data.SqlClient.SqlBulkCopyColumnMapping Add (string sourceColumn, string destinationColumn);
member this.Add : string * string -> System.Data.SqlClient.SqlBulkCopyColumnMapping
Public Function Add (sourceColumn As String, destinationColumn As String) As SqlBulkCopyColumnMapping

Parameter

sourceColumn
String

Nama kolom sumber dalam sumber data.

destinationColumn
String

Nama kolom tujuan dalam tabel tujuan.

Mengembalikan

SqlBulkCopyColumnMapping

Pemetaan kolom.

Contoh

Contoh berikut menyalin data secara massal dari tabel sumber di database sampel AdventureWorks ke tabel tujuan dalam database yang sama. Meskipun jumlah kolom di tujuan cocok dengan jumlah kolom dalam sumber, nama kolom dan posisi ordinal tidak cocok. Kode membuat SqlBulkCopyColumnMapping objek dengan menentukan nama kolom.

Penting

Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyiapan Contoh Salinan Massal. Kode ini disediakan untuk mendemonstrasikan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin 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.BulkCopyDemoDifferentColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            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();

            // Set up the bulk copy object.
            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";

                // The column order in the source doesn't match the order
                // in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add("ProductID", "ProdID");
                bulkCopy.ColumnMappings.Add("Name", "ProdName");
                bulkCopy.ColumnMappings.Add("ProductNumber", "ProdNum");

                // Write from the source to the destination.
                try
                {
                    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 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.BulkCopyDemoDifferentColumns;", _
                sourceConnection)
            Dim countStart As Long = _
               System.Convert.ToInt32(commandRowCount.ExecuteScalar())
            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

            ' Set up the bulk copy object.
            Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
                bulkCopy.DestinationTableName = _
                "dbo.BulkCopyDemoDifferentColumns"

                ' The column order in the source doesn't match the order 
                ' in the destination, so ColumnMappings must be defined.
                bulkCopy.ColumnMappings.Add("ProductID", "ProdID")
                bulkCopy.ColumnMappings.Add("Name", "ProdName")
                bulkCopy.ColumnMappings.Add("ProductNumber", "ProdNum")

                ' Write from the source to the destination.
                Try
                    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 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

Keterangan

Pemetaan dalam koleksi harus seragam: baik semua pasangan bilangan bulat/bilangan bulat, semua pasangan string/string, semua pasangan bilangan bulat/string, atau semua pasangan string/bilangan bulat. Jika Anda mencoba menambahkan pemetaan yang berbeda dari yang lain yang sudah ada dalam koleksi, InvalidOperationException akan dilemparkan.

Lihat juga

Berlaku untuk