SqlBulkCopyOptions Enumeration

SqlBulkCopyOptions Enumeration


Bitwise flag that specifies one or more options to use with an instance of SqlBulkCopy.

Namespace:   System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)

public enum SqlBulkCopyOptions

Member nameDescription

When specified,AllowEncryptedValueModifications enables bulk copying of encrypted data between tables or databases, without decrypting the data. Typically, an application would select data from encrypted columns from one table without decrypting the data (the app would connect to the database with the column encryption setting keyword set to disabled) and then would use this option to bulk insert the data, which is still encrypted. For more information, see Always Encrypted.

Use caution when specifying AllowEncryptedValueModifications as this may lead to corrupting the database because the driver does not check if the data is indeed encrypted, or if it is correctly encrypted using the same encryption type, algorithm and key as the target column.


Check constraints while data is being inserted. By default, constraints are not checked.


Use the default values for all options.


When specified, cause the server to fire the insert triggers for the rows being inserted into the database.


Preserve source identity values. When not specified, identity values are assigned by the destination.


Preserve null values in the destination table regardless of the settings for default values. When not specified, null values are replaced by default values where applicable.


Obtain a bulk update lock for the duration of the bulk copy operation. When not specified, row locks are used.


When specified, each batch of the bulk-copy operation will occur within a transaction. If you indicate this option and also provide a SqlTransaction object to the constructor, an ArgumentException occurs.

You can use the SqlBulkCopyOptions enumeration when you construct a SqlBulkCopy instance to change how the WriteToServer methods for that instance behave.

The following console application demonstrates how to perform a bulk load that copies the value in the identity column of the source table to the corresponding column in the destination table, instead of generating a new value for each row's identity column.

To see how the option changes the way the bulk load works, run the sample with the dbo.BulkCopyDemoMatchingColumns table empty. All rows load from the source. Next, run the sample again without emptying the table. An exception is thrown, and the code writes a message to the console window notifying you that rows were not added because of primary key violations.


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.Data.SqlClient;

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

            // Perform an initial count on the destination table.
            SqlCommand commandRowCount = new SqlCommand(
                "SELECT COUNT(*) FROM " +
            long countStart = System.Convert.ToInt32(
            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 =

            // Create the SqlBulkCopy object using a connection string 
            // and the KeepIdentity option. 
            // 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, SqlBulkCopyOptions.KeepIdentity))
                bulkCopy.DestinationTableName =

                    // Write from the source to the destination.
                catch (Exception ex)
                    // Close the SqlDataReader. The SqlBulkCopy
                    // object is automatically closed at the end
                    // of the using block.

            // Perform a final count on the destination 
            // table to see how many rows were added.
            long countEnd = System.Convert.ToInt32(
            Console.WriteLine("Ending row count = {0}", countEnd);
            Console.WriteLine("{0} rows were added.", countEnd - countStart);
            Console.WriteLine("Press Enter to finish.");

    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;";

.NET Framework
Available since 2.0
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