SqlBulkCopy.WriteToServer 方法

参考

定义

命名空间:: System.Data.SqlClient

程序集:: System.Data.dll

程序集:: netstandard.dll, System.Data.SqlClient.dll

程序集:: System.Data.SqlClient.dll

包:: System.Data.SqlClient v4.8.6

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将所有行从数据源复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

重载

WriteToServer(DataTable, DataRowState)	仅将与提供的 DataTable 中提供的行状态匹配的行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。
WriteToServer(IDataReader)	将所提供的 IDataReader 中的所有行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。
WriteToServer(DataTable)	将所提供的 DataTable 中的所有行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。
WriteToServer(DbDataReader)	将所有行从提供的 DbDataReader 数组复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。
WriteToServer(DataRow[])	将所有行从提供的 DataRow 数组复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

注解

如果禁用了多个活动结果集（MARS），WriteToServer 使连接变得繁忙。如果启用了 MARS，则可以将调用交错到同一连接中的其他命令 WriteToServer。

WriteToServer(DataTable, DataRowState)

仅将与提供的 DataTable 中提供的行状态匹配的行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

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

table: DataTable

一个 DataTable，其行将复制到目标表。

rowState: DataRowState

来自 DataRowState 枚举的值。仅将与行状态匹配的行复制到目标。

示例

以下控制台应用程序演示如何仅大容量加载与指定状态匹配的 DataTable 中的行。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，会在运行时创建一个 DataTable，并向其中添加三行。在执行 WriteToServer 方法之前，将编辑其中一行。使用 DataRowState.UnchangedrowState 参数调用 WriteToServer 方法，因此仅将两个未更改的行批量复制到目标。

重要

除非已按照大容量复制示例安装程序中所述创建了工作表，否则此示例不会运行。此代码用于演示仅使用 sqlBulkCopy 的语法。如果源表和目标表位于同一 SQL Server 实例中，则使用 Transact-SQL INSERT ... SELECT 语句复制数据更容易、更快。

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 rowState 参数中指示状态且尚未删除的 DataTable 中的行才会复制到目标表。

注意

如果指定了 Deleted，则任何 Unchanged、Added和 Modified 行也将复制到服务器。不会引发异常。

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。

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

另请参阅

DataRowState
在 SQL Server 中大容量复制操作
ADO.NET 概述

适用于

WriteToServer(IDataReader)

将所提供的 IDataReader 中的所有行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

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

reader: IDataReader

一个 IDataReader，其行将复制到目标表。

示例

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

重要

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，请对数据读取器调用 NextResult 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，当 WriteToServer 操作完成时，数据读取器可能处于不同的状态（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。

ColumnMappings 集合从数据读取器列映射到目标数据库表。

另请参阅

在 SQL Server 中大容量复制操作
ADO.NET 概述

适用于

WriteToServer(DataTable)

将所提供的 DataTable 中的所有行复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

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

table: DataTable

一个 DataTable，其行将复制到目标表。

示例

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

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

重要

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

DataTable 中的所有行将复制到目标表，但已删除的行除外。

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。

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

另请参阅

在 SQL Server 中大容量复制操作
ADO.NET 概述

适用于

WriteToServer(DbDataReader)

将所有行从提供的 DbDataReader 数组复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

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

reader: DbDataReader

一个 DbDataReader，其行将复制到目标表。

适用于

WriteToServer(DataRow[])

将所有行从提供的 DataRow 数组复制到由 SqlBulkCopy 对象的 DestinationTableName 属性指定的目标表。

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

rows: DataRow[]

将复制到目标表的 DataRow 对象的数组。

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 DataTable。从 DataTable 中选择一行以复制到目标表。

重要

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。

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

另请参阅

在 SQL Server 中大容量复制操作
ADO.NET 概述

适用于

通过

SqlBulkCopy.WriteToServer 方法

定义

重载

注解

WriteToServer(DataTable, DataRowState)

参数

示例

注解

另请参阅

适用于

WriteToServer(IDataReader)

参数

示例

注解

另请参阅

适用于

WriteToServer(DataTable)

参数

示例

注解

另请参阅

适用于

WriteToServer(DbDataReader)

参数

适用于

WriteToServer(DataRow[])

参数

示例

注解

另请参阅

适用于

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