SqlBulkCopyColumnOrderHintCollection.Add Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
| Add(SqlBulkCopyColumnOrderHint) |
Adds the specified order hint to the SqlBulkCopyColumnOrderHintCollection. |
| Add(String, SortOrder) |
Creates a new SqlBulkCopyColumnOrderHint and adds it to the collection. |
Add(SqlBulkCopyColumnOrderHint)
Adds the specified order hint to the SqlBulkCopyColumnOrderHintCollection.
public:
Microsoft::Data::SqlClient::SqlBulkCopyColumnOrderHint ^ Add(Microsoft::Data::SqlClient::SqlBulkCopyColumnOrderHint ^ columnOrderHint);public Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHint Add (Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHint columnOrderHint);member this.Add : Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHint -> Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHintPublic Function Add (columnOrderHint As SqlBulkCopyColumnOrderHint) As SqlBulkCopyColumnOrderHintParameters
- columnOrderHint
- SqlBulkCopyColumnOrderHint
The SqlBulkCopyColumnOrderHint object that describes the order hint to be added to the collection.
Returns
A SqlBulkCopyColumnOrderHint object.
Exceptions
The value is null.
Examples
The following example bulk copies data from a source table in the AdventureWorks sample database to a destination table in the same database. A SqlBulkCopyColumnOrderHint object is used to define the sort order for the ProductNumber destination column.
Important
This sample will not run unless you have created the work tables as described in Bulk Copy Example Setup.
This code is provided to demonstrate the syntax for using SqlBulkCopy only. If the source and destination tables are in the same SQL Server instance,
it is easier and faster to use a Transact-SQL INSERT … SELECT statement to copy the data.
// <Snippet1>
using System;
using System.Data;
using Microsoft.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 (SqlBulkCopy bulkCopy =
new SqlBulkCopy(connectionString))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
// Specify the sort order for the ProductNumber column in
// the destination table.
// Setup an order hint for the ProductNumber column.
SqlBulkCopyColumnOrderHint hintNumber =
new SqlBulkCopyColumnOrderHint("ProductNumber", SortOrder.Ascending);
bulkCopy.ColumnOrderHints.Add(hintNumber);
// 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;";
}
}
// </Snippet1>
Applies to
Add(String, SortOrder)
Creates a new SqlBulkCopyColumnOrderHint and adds it to the collection.
public:
Microsoft::Data::SqlClient::SqlBulkCopyColumnOrderHint ^ Add(System::String ^ column, Microsoft::Data::SqlClient::SortOrder sortOrder);public Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHint Add (string column, Microsoft.Data.SqlClient.SortOrder sortOrder);member this.Add : string * Microsoft.Data.SqlClient.SortOrder -> Microsoft.Data.SqlClient.SqlBulkCopyColumnOrderHintPublic Function Add (column As String, sortOrder As SortOrder) As SqlBulkCopyColumnOrderHintParameters
- column
- String
The name of the destination column within the destination table.
- sortOrder
- SortOrder
The sort order of the corresponding destination column.
Returns
A column column order hint.
Examples
The following example bulk copies data from a source table in the AdventureWorks sample database to a destination table in the same database. A SqlBulkCopyColumnOrderHint object is added to the ColumnOrderHints by providing the destination column name and its sort order.
Important
This sample will not run unless you have created the work tables as described in Bulk Copy Example Setup.
This code is provided to demonstrate the syntax for using SqlBulkCopy only. If the source and destination tables are in the same SQL Server instance, it is easier and faster to use a
Transact-SQL INSERT … SELECT statement to copy the data.
using System;
using System.Data;
using Microsoft.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 (SqlBulkCopy bulkCopy =
new SqlBulkCopy(connectionString))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
// Specify the sort order for the ProductNumber column in
// the destination table.
bulkCopy.ColumnOrderHints.Add("ProductNumber", SortOrder.Ascending);
// 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;";
}
}