SQL

Consistent Batch Number Updates in SQL Server Stored Procedur

To handle this situation effectively, you need to ensure that the stored procedure correctly updates the batch number while also verifying that other columns, such as DateCapture, remain consistent. Here's an approach you can take:

  1. Check the Current Batch Number: Retrieve the current batch number and other relevant columns.
  2. Update the Batch Number: Increment the batch number.
  3. Verify Column Consistency: Ensure that other columns, such as DateCapture, are consistent with the updated batch number.

Here's an example of how you might implement this in a stored procedure:

CREATE PROCEDURE UpdateBatchNumber
AS
BEGIN
    DECLARE @CurrentBatchNumber INT;
    DECLARE @NewBatchNumber INT;
    DECLARE @DateCapture DATETIME;

    -- Start a transaction to ensure data consistency
    BEGIN TRANSACTION;

    -- Retrieve the current batch number and DateCapture
    SELECT TOP 1
        @CurrentBatchNumber = BatchNumber,
        @DateCapture = DateCapture
    FROM YourTable
    ORDER BY BatchNumber DESC;

    -- Increment the batch number
    SET @NewBatchNumber = @CurrentBatchNumber + 1;

    -- Update the batch number and ensure DateCapture consistency
    UPDATE YourTable
    SET BatchNumber = @NewBatchNumber,
        DateCapture = CASE
            WHEN DateCapture IS NOT NULL THEN DateCapture
            ELSE GETDATE() -- Or another logic to handle DateCapture consistency
        END
    WHERE BatchNumber = @CurrentBatchNumber;

    -- Commit the transaction if everything is consistent
    COMMIT TRANSACTION;

    -- Return the new batch number
    SELECT @NewBatchNumber AS NewBatchNumber;
END;
SQL

Explanation

  1. Start a Transaction: This ensures that all operations within the transaction are completed successfully or rolled back in case of an error, maintaining data consistency.
  2. Retrieve Current Batch Number and DateCapture: This selects the latest batch number and the associated DateCapture from the table.
  3. Increment the Batch Number: The current batch number is incremented by 1.
  4. Update the Batch Number and DateCapture: The batch number is updated to the new value. DateCapture is checked for consistency. If it's not null, it remains the same; otherwise, it is set to the current date/time or another consistent value as per your business logic.
  5. Commit the Transaction: If all updates are successful, the transaction is committed, ensuring that the changes are saved to the database.

Integration with WPF Application

In your WPF application, you can call this stored procedure and handle the result appropriately. Here is a basic example using ADO.NET:

using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows;

public void UpdateBatchNumber()
{
    string connectionString = "YourConnectionString";
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        SqlCommand command = new SqlCommand("UpdateBatchNumber", connection);
        command.CommandType = CommandType.StoredProcedure;

        try
        {
            connection.Open();
            SqlDataReader reader = command.ExecuteReader();

            if (reader.Read())
            {
                int newBatchNumber = reader.GetInt32(0);
                MessageBox.Show($"Batch number updated to {newBatchNumber}");
            }

            reader.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show($"Error: {ex.Message}");
        }
    }
}
C#

In this example, the UpdateBatchNumber method connects to the database, calls the stored procedure, and displays the new batch number to the user. You can integrate this method into your WPF application's logic to update the batch number when needed.

Conclusion

By using transactions and ensuring column consistency in your stored procedure, you can maintain data integrity when updating batch numbers. Integrate this logic into your WPF application to provide a seamless and consistent experience for users.
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