// Bulk Operations

// Doc: https://bulk-operations.net/bulk-synchronize

​

// @nuget: Z.BulkOperations

// @nuget: System.Data.SqlClient

​

using System;

using System.Collections.Generic;

using System.Data;

using System.Data.SqlClient;

using System.Linq;

using Z.BulkOperations;

public class Program

{

    public static void Main()

    {

        GenerateDatabase();

        GenerateCustomers(3);

        DataTable dtCustomers = new DataTable("Customers");

        dtCustomers.Columns.Add("CustomerID", typeof(int));

        dtCustomers.Columns.Add("Code", typeof(string)); 

        dtCustomers.Columns.Add("FirstName", typeof(string)); 

        dtCustomers.Columns.Add("LastName", typeof(string)); 

        for(int i = 0; i < 2; i++)

        {

            var drCustomer = dtCustomers.NewRow();  

            drCustomer["CustomerID"] = (i + 1);

            drCustomer["Code"] = "Code_" + i;

            drCustomer["FirstName"] = "Updated_FirstName_" + i;

            drCustomer["LastName"] = "Updated_LastName_" + i; 

            dtCustomers.Rows.Add(drCustomer);

        }

        for(int i = 0; i < 2; i++)

        {

            var drCustomer = dtCustomers.NewRow();  

            drCustomer["CustomerID"] = 1000 + i;

            drCustomer["Code"] ="New_Code_" + i;

            drCustomer["FirstName"] = "New_FirstName_" + i;

            drCustomer["LastName"] = "New_LastName_" + i; 

            dtCustomers.Rows.Add(drCustomer);

        }

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            // SHOW data

            ShowData(connection, "Before");

            // SAVE customers

            using (var bulk = new BulkOperation(connection))

            {

                bulk.DestinationTableName = "Customers";

​

                bulk.SynchronizeKeepidentity = true;

                bulk.AutoMapKeyName = "Code";

                bulk.BulkSynchronize(dtCustomers);

            }

            // SHOW data

            ShowData(connection, "After");

        }

    }

    public static void ShowData(SqlConnection connection, string text)

    {

        // SHOW data

        using (var command = connection.CreateCommand())

        {

            command.CommandText = @"

SELECT * FROM Customers

";

            var ds = new DataSet();

            var sqlDataAdapter = new SqlDataAdapter(command);

            sqlDataAdapter.Fill(ds);

​

            ds.Tables[0].TableName = "1 - Customers " + text;

            FiddleHelper.WriteTable(ds.Tables[0]);

        }

    }

    public static void GenerateCustomers(int count, bool useOld = false) 

    {

        DataTable dtTable = new DataTable("Customers");

        dtTable.Columns.Add("CustomerID", typeof(int));

        dtTable.Columns.Add("Code", typeof(string)); 

        dtTable.Columns.Add("FirstName", typeof(string)); 

        dtTable.Columns.Add("LastName", typeof(string)); 

        for(int i = 0; i < count; i++)

        {

            var drCustomer = dtTable.NewRow();  

            drCustomer["CustomerID"] = (i + 1);

            drCustomer["Code"] = "Code_" + i;

            drCustomer["FirstName"] = "FirstName_" + i;

            drCustomer["LastName"] = "LastName_" + i; 

            dtTable.Rows.Add(drCustomer);

        }

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            // SAVE customers

            using (var bulk = new BulkOperation(connection))

            {

                // easy to use

                bulk.DestinationTableName = "Customers";

​

                bulk.BulkInsert(dtTable);

            }

        }

    }

    public static void GenerateDatabase()

    {

        using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            connection.Open();

            using (var command = connection.CreateCommand())

            {

                command.CommandText = @"   

CREATE TABLE [Customers]

(

    [CustomerID] [INT] IDENTITY(1,1) NOT NULL,

    [Code] [NVARCHAR](MAX) NULL,

    [FirstName] [NVARCHAR](MAX) NULL,

    [LastName] [NVARCHAR](MAX) NULL,

    CONSTRAINT [PK_Customers] PRIMARY KEY CLUSTERED 

    (

        [CustomerID] ASC

    )

)";

                command.ExecuteNonQuery();

            }

        }

    }

}