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C# SqlBulkCopyColumnMapping.SourceColumn属性代码示例

本文整理汇总了C#中System.Data.SqlClient.SqlBulkCopyColumnMapping.SourceColumn属性的典型用法代码示例。如果您正苦于以下问题:C# SqlBulkCopyColumnMapping.SourceColumn属性的具体用法?C# SqlBulkCopyColumnMapping.SourceColumn怎么用?C# SqlBulkCopyColumnMapping.SourceColumn使用的例子?那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在System.Data.SqlClient.SqlBulkCopyColumnMapping的用法示例。


在下文中一共展示了SqlBulkCopyColumnMapping.SourceColumn属性的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Main

//引入命名空间
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 source and destination.
                SqlBulkCopyColumnMapping mapID = new SqlBulkCopyColumnMapping();
                mapID.SourceColumn = "ProductID";
                mapID.DestinationColumn = "ProdID";
                bulkCopy.ColumnMappings.Add(mapID);

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

                SqlBulkCopyColumnMapping mapNumber = new SqlBulkCopyColumnMapping();
                mapNumber.SourceColumn = "ProductNumber";
                mapNumber.DestinationColumn = "ProdNum";
                bulkCopy.ColumnMappings.Add(mapNumber);

                // 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;";
    }
}
开发者ID:.NET开发者,项目名称:System.Data.SqlClient,代码行数:92,代码来源:SqlBulkCopyColumnMapping.SourceColumn


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