本文实例讲述了C#使用SqlBulkCopy批量复制数据到数据表的方法。分享给大家供大家参考。具体实现方法如下：

使用 SqlBulkCopy 类只能向 SQL Server 表写入数据。但是，数据源不限于 SQL Server；可以使用任何数据源，只要数据可加载到 DataTable 实例或可使用 IDataReader 实例读取数据

1.使用Datatable作为数据源的方式：

下面的代码使用到了ColumnMappings，因为目标表和数据源Datatable的结构不一致，需要这么一个映射来指定对应关系

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();

            // Open the destination connection. In the real world you would
            // not use SqlBulkCopy to move data from one table to the other
            // in the same database. This is for demonstration purposes only.
            using (SqlConnection destinationConnection =
                       new SqlConnection(connectionString))
            {
                destinationConnection.Open();

                // Set up the bulk copy object.
                // Note that the column positions in the source
                // data reader match the column positions in
                // the destination table so there is no need to
                // map columns.
                using (SqlBulkCopy bulkCopy =
                           new SqlBulkCopy(destinationConnection))
                {
                    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;\";
    }
}