c# 4.0 - C#Bulk Insert SQLBulkCopy-Actualizar si existe

c#-4.0 bulkinsert

Question

Posible duplicado:
¿Alguna forma de SQLBulkCopy "insertar o actualizar si existe"?

Estoy usando SQLBulkCopy para insertar registros SQLBulkCopy

¿Cómo puedo realizar una actualización (en lugar de una inserción) en registros que ya existen? ¿Es esto posible con SQLBulkCopy ?

Este es mi código para SQLBulkCopy

using (var bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString, SqlBulkCopyOptions.KeepNulls & SqlBulkCopyOptions.KeepIdentity))
{
bulkCopy.BatchSize = CustomerList.Count;
bulkCopy.DestinationTableName = "dbo.tCustomers";
bulkCopy.ColumnMappings.Clear();
bulkCopy.ColumnMappings.Add("CustomerID", "CustomerID");
bulkCopy.ColumnMappings.Add("FirstName", "FirstName");
bulkCopy.ColumnMappings.Add("LastName", "LastName");
bulkCopy.ColumnMappings.Add("Address1", "Address1");
bulkCopy.ColumnMappings.Add("Address2", "Address2");
bulkCopy.WriteToServer(CustomerList);
}

Detalles de la aplicación

1. ASP.net MVC 3.0 Razor view Engine
2. SQL Server 2008

Answer 1

Gracias a @pst

Con sus sugerencias, así es como lo implementé, si alguien tiene que implementar algo similar.

Inserto a granel en la tabla de temperatura permanente

 using (var bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString, SqlBulkCopyOptions.KeepNulls & SqlBulkCopyOptions.KeepIdentity))
{
bulkCopy.BatchSize = CustomerList.Count;
bulkCopy.DestinationTableName = "dbo.tPermanentTempTable";
bulkCopy.ColumnMappings.Clear();
bulkCopy.ColumnMappings.Add("CustomerID", "CustomerID");
bulkCopy.ColumnMappings.Add("FirstName", "FirstName");
bulkCopy.ColumnMappings.Add("LastName", "LastName");
bulkCopy.ColumnMappings.Add("Address1", "Address1");
bulkCopy.ColumnMappings.Add("Address2", "Address2");
bulkCopy.WriteToServer(CustomerList);
} 

Luego llame a un procedimiento almacenado para fusionar la tabla temporal con la tabla real

 using (Entities context = new Entities())
{
System.Nullable<int> iReturnValue = context.usp_Customer_BulkUploadMerge(customerid, locationID).SingleOrDefault();
if (iReturnValue.HasValue)
{
// return was successful!
}
}

Así es como utilicé Merge en mi procedimiento almacenado

ALTER PROCEDURE usp_Customer_BulkUploadMerge
(
@CustomerID INT ,
@locationID INT
)
AS
BEGIN
DECLARE @retValue INT
BEGIN TRY
IF OBJECT_ID(''tCustomers'') IS NOT NULL
BEGIN
BEGIN TRANSACTION MergPatientsTable
SET NOCOUNT ON;
MERGE dbo.tCustomers AS target
USING
( SELECT PU.CustomerID ,
PU.LocationID ,
PU.FirstName ,
PU.LastName ,
PU.MiddleInitial ,
PU.Gender ,
PU.DOB
FROM dbo.tPermanentTempTable PU
WHERE PU.CustomerID = @CustomerID
AND PU.LocationID = @locationID
GROUP BY PU.CustomerID ,
PU.LocationID ,
PU.FirstName ,
PU.LastName ,
PU.MiddleInitial ,
PU.Gender ,
PU.DOB
) AS source ( CustomerID, LocationID, FirstName,
LastName, MiddleInitial, Gender, DOB )
ON ( LOWER(target.FirstName) = LOWER(source.FirstName)
AND LOWER(target.LastName) = LOWER(source.LastName)
AND target.DOB = source.DOB
)
WHEN MATCHED
THEN
UPDATE SET
MiddleInitial = source.MiddleInitial ,
Gender = source.Gender,
LastActive = GETDATE()
WHEN NOT MATCHED
THEN
INSERT (
CustomerID ,
LocationID ,
FirstName ,
LastName ,
MiddleInitial ,
Gender ,
DOB ,
DateEntered ,
LastActive
) VALUES
( source.CustomerID ,
source.LocationID ,
source.FirstName ,
source.LastName ,
source.MiddleInitial ,
source.Gender ,
source.DOB ,
GETDATE() ,
NULL
);
DELETE PU
FROM dbo.tPermanentTempTable PU
WHERE PU.CustomerID = @CustomerID
AND PU.LocationID = @locationID
COMMIT TRANSACTION MergPatientsTable
SET @retValue = 1
SELECT @retValue
END
ELSE
BEGIN
SET @retValue = -1
SELECT @retValue
END
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION MergPatientsTable
DECLARE @ErrorMsg VARCHAR(MAX);
DECLARE @ErrorSeverity INT;
DECLARE @ErrorState INT;
SET @ErrorMsg = ERROR_MESSAGE();
SET @ErrorSeverity = ERROR_SEVERITY();
SET @ErrorState = ERROR_STATE();
SET @retValue = 0
SELECT @retValue
-- SELECT 0 AS isSuccess
END CATCH
END