SqlBulkCopy.WriteToServer 方法

public:
 void WriteToServer(System::Data::DataTable ^ table, System::Data::DataRowState rowState);

public void WriteToServer(System.Data.DataTable table, System.Data.DataRowState rowState);

member this.WriteToServer : System.Data.DataTable * System.Data.DataRowState -> unit

Public Sub WriteToServer (table As DataTable, rowState As DataRowState)

参数

示例

以下控制台应用程序演示如何仅批量加载与指定状态匹配的行 DataTable 。 在这种情况下，仅添加未更改的行。 目标表是 AdventureWorks 数据库中的表。

在此示例中，在运行时创建 a DataTable ，并向其中添加了三行。 WriteToServer在执行方法之前，将编辑其中一行。 使用 WriteToServer 参数调用 DataRowState.UnchangedrowState 该方法，因此仅将两个未更改的行批量复制到目标。

using System.Data.SqlClient;

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

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

            // Create a table with some rows.
            DataTable newProducts = MakeTable();

            // Make a change to one of the rows in the DataTable.
            DataRow row = newProducts.Rows[0];
            row.BeginEdit();
            row["Name"] = "AAA";
            row.EndEdit();

            // Create the SqlBulkCopy object.
            // Note that the column positions in the source DataTable
            // match the column positions in the destination table so
            // there is no need to map columns.
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoMatchingColumns";

                try
                {
                    // Write unchanged rows from the source to the destination.
                    bulkCopy.WriteToServer(newProducts, DataRowState.Unchanged);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

            // 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 DataTable MakeTable()
        // Create a new DataTable named NewProducts.
    {
        DataTable newProducts = new DataTable("NewProducts");

        // Add three column objects to the table.
        DataColumn productID = new DataColumn();
        productID.DataType = System.Type.GetType("System.Int32");
        productID.ColumnName = "ProductID";
        productID.AutoIncrement = true;
        newProducts.Columns.Add(productID);

        DataColumn productName = new DataColumn();
        productName.DataType = System.Type.GetType("System.String");
        productName.ColumnName = "Name";
        newProducts.Columns.Add(productName);

        DataColumn productNumber = new DataColumn();
        productNumber.DataType = System.Type.GetType("System.String");
        productNumber.ColumnName = "ProductNumber";
        newProducts.Columns.Add(productNumber);

        // Create an array for DataColumn objects.
        DataColumn[] keys = new DataColumn[1];
        keys[0] = productID;
        newProducts.PrimaryKey = keys;

        // Add some new rows to the collection.
        DataRow row = newProducts.NewRow();
        row["Name"] = "CC-101-WH";
        row["ProductNumber"] = "Cyclocomputer - White";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-BK";
        row["ProductNumber"] = "Cyclocomputer - Black";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-ST";
        row["ProductNumber"] = "Cyclocomputer - Stainless";
        newProducts.Rows.Add(row);
        newProducts.AcceptChanges();

        // Return the new DataTable.
        return newProducts;
    }
    private static string GetConnectionString()
        // To avoid storing the connection 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 connection As SqlConnection = _
           New SqlConnection(connectionString)
            connection.Open()

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

            ' Create a table with some rows.
            Dim newProducts As DataTable = MakeTable()

            ' Make a change to one of the rows in the DataTable.
            Dim row As DataRow = newProducts.Rows(0)
            row.BeginEdit()
            row("Name") = "AAA"
            row.EndEdit()

            ' Set up the bulk copy object. 
            ' Note that the column positions in the source DataTable 
            ' match the column positions in the destination table, 
            ' so there is no need to map columns.
            Using bulkCopy As SqlBulkCopy = _
              New SqlBulkCopy(connection)
                bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"

                Try
                    ' Write unchanged rows from the source to the destination.
                    bulkCopy.WriteToServer(newProducts, DataRowState.Unchanged)

                Catch ex As Exception
                    Console.WriteLine(ex.Message)
                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 MakeTable() As DataTable
        ' Create a new DataTable named NewProducts.
        Dim newProducts As DataTable = _
         New DataTable("NewProducts")

        ' Add three column objects to the table.
        Dim productID As DataColumn = New DataColumn()
        productID.DataType = System.Type.GetType("System.Int32")
        productID.ColumnName = "ProductID"
        productID.AutoIncrement = True
        newProducts.Columns.Add(productID)

        Dim productName As DataColumn = New DataColumn()
        productName.DataType = System.Type.GetType("System.String")
        productName.ColumnName = "Name"
        newProducts.Columns.Add(productName)

        Dim productNumber As DataColumn = New DataColumn()
        productNumber.DataType = System.Type.GetType("System.String")
        productNumber.ColumnName = "ProductNumber"
        newProducts.Columns.Add(productNumber)

        ' Create an array for DataColumn objects.
        Dim keys(0) As DataColumn
        keys(0) = productID
        newProducts.PrimaryKey = keys

        ' Add some new rows to the collection.
        Dim row As DataRow
        row = newProducts.NewRow()
        row("Name") = "CC-101-WH"
        row("ProductNumber") = "Cyclocomputer - White"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-BK"
        row("ProductNumber") = "Cyclocomputer - Black"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-ST"
        row("ProductNumber") = "Cyclocomputer - Stainless"
        newProducts.Rows.Add(row)
        newProducts.AcceptChanges()

        ' Return the new DataTable.
        Return newProducts
    End Function

    Private Function GetConnectionString() As String
        ' To avoid storing the connection 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

注解

只有处于自变量中rowState指示状态且DataTable尚未删除的行才会复制到目标表。

当大容量复制操作正在进行时，关联的目标 SqlConnection 正忙于为它提供服务，并且无法对连接执行其他操作。

集合 ColumnMappings 从 DataTable 列映射到目标数据库表。

另请参阅

• DataRowState
• SQL Server 中的大容量复制操作
• ADO.NET 概述

public:
 void WriteToServer(System::Data::IDataReader ^ reader);

public void WriteToServer(System.Data.IDataReader reader);

member this.WriteToServer : System.Data.IDataReader -> unit

Public Sub WriteToServer (reader As IDataReader)

参数

示例

以下控制台应用程序演示如何从 . SqlDataReader. 目标表是 AdventureWorks 数据库中的表。

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("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 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";

                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 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("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 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"

                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 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

注解

复制操作从读取器中的下一个可用行开始。 大多数情况下，读取器只是通过 ExecuteReader 或类似的调用返回的，因此下一个可用行是第一行。 若要处理多个结果，请调用 NextResult 数据读取器并再次调用 WriteToServer 。

请注意，使用 WriteToServer 修改读取器的状态。 该方法将调用 Read ，直到返回 false、操作中止或发生错误。 这意味着在操作完成后，数据读取器可能处于不同的状态（ WriteToServer 可能位于结果集的末尾）。

当大容量复制操作正在进行时，关联的目标 SqlConnection 正忙于为它提供服务，并且无法对连接执行其他操作。

集合 ColumnMappings 从数据读取器列映射到目标数据库表。

另请参阅

• SQL Server 中的大容量复制操作
• ADO.NET 概述

public:
 void WriteToServer(System::Data::DataTable ^ table);

public void WriteToServer(System.Data.DataTable table);

member this.WriteToServer : System.Data.DataTable -> unit

Public Sub WriteToServer (table As DataTable)

参数

示例

以下控制台应用程序演示如何从中 DataTable大容量加载数据。 目标表是 AdventureWorks 数据库中的表。

在此示例中，在运行时创建 a DataTable ，并且是操作的 SqlBulkCopy 源。

using System.Data.SqlClient;

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

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

            // Create a table with some rows.
            DataTable newProducts = MakeTable();

            // Create the SqlBulkCopy object.
            // Note that the column positions in the source DataTable
            // match the column positions in the destination table so
            // there is no need to map columns.
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoMatchingColumns";

                try
                {
                    // Write from the source to the destination.
                    bulkCopy.WriteToServer(newProducts);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

            // 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 DataTable MakeTable()
        // Create a new DataTable named NewProducts.
    {
        DataTable newProducts = new DataTable("NewProducts");

        // Add three column objects to the table.
        DataColumn productID = new DataColumn();
        productID.DataType = System.Type.GetType("System.Int32");
        productID.ColumnName = "ProductID";
        productID.AutoIncrement = true;
        newProducts.Columns.Add(productID);

        DataColumn productName = new DataColumn();
        productName.DataType = System.Type.GetType("System.String");
        productName.ColumnName = "Name";
        newProducts.Columns.Add(productName);

        DataColumn productNumber = new DataColumn();
        productNumber.DataType = System.Type.GetType("System.String");
        productNumber.ColumnName = "ProductNumber";
        newProducts.Columns.Add(productNumber);

        // Create an array for DataColumn objects.
        DataColumn[] keys = new DataColumn[1];
        keys[0] = productID;
        newProducts.PrimaryKey = keys;

        // Add some new rows to the collection.
        DataRow row = newProducts.NewRow();
        row["Name"] = "CC-101-WH";
        row["ProductNumber"] = "Cyclocomputer - White";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-BK";
        row["ProductNumber"] = "Cyclocomputer - Black";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-ST";
        row["ProductNumber"] = "Cyclocomputer - Stainless";
        newProducts.Rows.Add(row);
        newProducts.AcceptChanges();

        // Return the new DataTable.
        return newProducts;
    }
    private static string GetConnectionString()
        // To avoid storing the connection 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 connection As SqlConnection = _
           New SqlConnection(connectionString)
            connection.Open()

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

            ' Create a table with some rows.
            Dim newProducts As DataTable = MakeTable()

            ' Note that the column positions in the source DataTable 
            ' match the column positions in the destination table, 
            ' so there is no need to map columns.
            Using bulkCopy As SqlBulkCopy = _
              New SqlBulkCopy(connection)
                bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"

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

                Catch ex As Exception
                    Console.WriteLine(ex.Message)
                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 MakeTable() As DataTable
        ' Create a new DataTable named NewProducts.
        Dim newProducts As DataTable = _
         New DataTable("NewProducts")

        ' Add three column objects to the table.
        Dim productID As DataColumn = New DataColumn()
        productID.DataType = System.Type.GetType("System.Int32")
        productID.ColumnName = "ProductID"
        productID.AutoIncrement = True
        newProducts.Columns.Add(productID)

        Dim productName As DataColumn = New DataColumn()
        productName.DataType = System.Type.GetType("System.String")
        productName.ColumnName = "Name"
        newProducts.Columns.Add(productName)

        Dim productNumber As DataColumn = New DataColumn()
        productNumber.DataType = System.Type.GetType("System.String")
        productNumber.ColumnName = "ProductNumber"
        newProducts.Columns.Add(productNumber)

        ' Create an array for DataColumn objects.
        Dim keys(0) As DataColumn
        keys(0) = productID
        newProducts.PrimaryKey = keys

        ' Add some new rows to the collection.
        Dim row As DataRow
        row = newProducts.NewRow()
        row("Name") = "CC-101-WH"
        row("ProductNumber") = "Cyclocomputer - White"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-BK"
        row("ProductNumber") = "Cyclocomputer - Black"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-ST"
        row("ProductNumber") = "Cyclocomputer - Stainless"
        newProducts.Rows.Add(row)
        newProducts.AcceptChanges()

        ' Return the new DataTable.
        Return newProducts
    End Function

    Private Function GetConnectionString() As String
        ' To avoid storing the connection 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

注解

除已删除的行外，所有 DataTable 行都会复制到目标表。

当大容量复制操作正在进行时，关联的目标 SqlConnection 正忙于为它提供服务，并且无法对连接执行其他操作。

集合 ColumnMappings 从 DataTable 列映射到目标数据库表。

另请参阅

• SQL Server 中的大容量复制操作
• ADO.NET 概述

public:
 void WriteToServer(System::Data::Common::DbDataReader ^ reader);

public void WriteToServer(System.Data.Common.DbDataReader reader);

member this.WriteToServer : System.Data.Common.DbDataReader -> unit

Public Sub WriteToServer (reader As DbDataReader)

参数

public:
 void WriteToServer(cli::array <System::Data::DataRow ^> ^ rows);

public void WriteToServer(System.Data.DataRow[] rows);

member this.WriteToServer : System.Data.DataRow[] -> unit

Public Sub WriteToServer (rows As DataRow())

参数

示例

以下控制台应用程序演示如何从 DataRow 数组大容量加载数据。 目标表是 AdventureWorks 数据库中的表。

在此示例中，在运行时创建一个 DataTable 。 从 DataTable 要复制到目标表的单个行中选择。

using System.Data.SqlClient;

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

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

            // Create a table with some rows.
            DataTable newProducts = MakeTable();

            // Get a reference to a single row in the table.
            DataRow[] rowArray = newProducts.Select(
                "Name='CC-101-BK'");

            // Create the SqlBulkCopy object.
            // Note that the column positions in the source DataTable
            // match the column positions in the destination table so
            // there is no need to map columns.
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoMatchingColumns";

                try
                {
                    // Write the array of rows to the destination.
                    bulkCopy.WriteToServer(rowArray);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

            // 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 DataTable MakeTable()
        // Create a new DataTable named NewProducts.
    {
        DataTable newProducts = new DataTable("NewProducts");

        // Add three column objects to the table.
        DataColumn productID = new DataColumn();
        productID.DataType = System.Type.GetType("System.Int32");
        productID.ColumnName = "ProductID";
        productID.AutoIncrement = true;
        newProducts.Columns.Add(productID);

        DataColumn productName = new DataColumn();
        productName.DataType = System.Type.GetType("System.String");
        productName.ColumnName = "Name";
        newProducts.Columns.Add(productName);

        DataColumn productNumber = new DataColumn();
        productNumber.DataType = System.Type.GetType("System.String");
        productNumber.ColumnName = "ProductNumber";
        newProducts.Columns.Add(productNumber);

        // Create an array for DataColumn objects.
        DataColumn[] keys = new DataColumn[1];
        keys[0] = productID;
        newProducts.PrimaryKey = keys;

        // Add some new rows to the collection.
        DataRow row = newProducts.NewRow();
        row["Name"] = "CC-101-WH";
        row["ProductNumber"] = "Cyclocomputer - White";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-BK";
        row["ProductNumber"] = "Cyclocomputer - Black";

        newProducts.Rows.Add(row);
        row = newProducts.NewRow();
        row["Name"] = "CC-101-ST";
        row["ProductNumber"] = "Cyclocomputer - Stainless";
        newProducts.Rows.Add(row);
        newProducts.AcceptChanges();

        // Return the new DataTable.
        return newProducts;
    }
    private static string GetConnectionString()
        // To avoid storing the connection 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 connection As SqlConnection = _
           New SqlConnection(connectionString)
            connection.Open()

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

            ' Create a table with some rows.
            Dim newProducts As DataTable = MakeTable()

            ' Get a reference to a single row in the table.
            Dim rowArray() As DataRow = newProducts.Select( _
             "Name='CC-101-BK'")

            ' Note that the column positions in the source DataTable 
            ' match the column positions in the destination table, 
            ' so there is no need to map columns.
            Using bulkCopy As SqlBulkCopy = _
              New SqlBulkCopy(connection)
                bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"

                Try
                    ' Write the array of rows to the destination.
                    bulkCopy.WriteToServer(rowArray)

                Catch ex As Exception
                    Console.WriteLine(ex.Message)
                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 MakeTable() As DataTable
        ' Create a new DataTable named NewProducts.
        Dim newProducts As DataTable = _
         New DataTable("NewProducts")

        ' Add three column objects to the table.
        Dim productID As DataColumn = New DataColumn()
        productID.DataType = System.Type.GetType("System.Int32")
        productID.ColumnName = "ProductID"
        productID.AutoIncrement = True
        newProducts.Columns.Add(productID)

        Dim productName As DataColumn = New DataColumn()
        productName.DataType = System.Type.GetType("System.String")
        productName.ColumnName = "Name"
        newProducts.Columns.Add(productName)

        Dim productNumber As DataColumn = New DataColumn()
        productNumber.DataType = System.Type.GetType("System.String")
        productNumber.ColumnName = "ProductNumber"
        newProducts.Columns.Add(productNumber)

        ' Create an array for DataColumn objects.
        Dim keys(0) As DataColumn
        keys(0) = productID
        newProducts.PrimaryKey = keys

        ' Add some new rows to the collection.
        Dim row As DataRow
        row = newProducts.NewRow()
        row("Name") = "CC-101-WH"
        row("ProductNumber") = "Cyclocomputer - White"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-BK"
        row("ProductNumber") = "Cyclocomputer - Black"
        newProducts.Rows.Add(row)

        row = newProducts.NewRow()
        row("Name") = "CC-101-ST"
        row("ProductNumber") = "Cyclocomputer - Stainless"
        newProducts.Rows.Add(row)
        newProducts.AcceptChanges()

        ' Return the new DataTable.
        Return newProducts
    End Function

    Private Function GetConnectionString() As String
        ' To avoid storing the connection 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

注解

当大容量复制操作正在进行时，关联的目标 SqlConnection 正忙于为它提供服务，并且无法对连接执行其他操作。

集合 ColumnMappings 从 DataRow 列映射到目标数据库表。

另请参阅

• SQL Server 中的大容量复制操作
• ADO.NET 概述