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All the modifications in this section are stored procedures. The CommerceLibOrderUpdateStatus Stored Procedure Each pipeline section needs the capability to change the status of an order, advancing it to the next pipeline section. Rather than simply incrementing the status, this functionality is kept flexible, just in case you end up with a more complicated branched pipeline. This requires a new stored procedure, CommerceLibOrderUpdateStatus: CREATE PROCEDURE CommerceLibOrderUpdateStatus (@OrderID int, @Status int) AS UPDATE Orders SET Status = @Status WHERE OrderID = @OrderID The CommerceLibOrderSetAuthCode Stored Procedure In 20, when we deal with credit card usage, you ll need to set data in the AuthCode and Reference fields in the Orders table. This requires a new stored procedure, CommerceLibOrderSetAuthCode: CREATE PROCEDURE CommerceLibOrderSetAuthCode (@OrderID int, @AuthCode nvarchar(50), @Reference nvarchar(50)) AS UPDATE Orders SET AuthCode = @AuthCode, Reference = @Reference WHERE OrderID = @OrderID





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Bitmap bmp = new Bitmap(dir + "code.png"); // config reader setting ReaderSettings ... QRCode ); // read all barcodes Barcode[] barcodes = BarcodeReader.

now it is sufficient to know that this clause ensures that an XML representation of the result set is returned and it must be present. To see how ExecuteXmlReader() works, you will develop an application as shown in Figure 7-1.

The CommerceLibOrderSetDateShipped Stored Procedure When an order is shipped, you should update the shipment date in the database, which can simply be the current date. The new stored procedure to do this, CommerceLibOrderSetDateShipped, is as follows: CREATE PROCEDURE CommerceLibOrderSetDateShipped (@OrderID int) AS UPDATE Orders SET DateShipped = GetDate() WHERE OrderID = @OrderID





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Next you need to modify CommerceLibAccess to use the new stored procedures. All the methods in this section act in much the same way as some of the other methods of CommerceLibAccess that you ve seen already. The UpdateOrderStatus Method This method calls the CommerceLibOrderUpdateStatus stored procedure. Add the following code to your CommerceLibAccess class: public static void UpdateOrderStatus(int orderID, int status) { // get a configured DbCommand object DbCommand comm = GenericDataAccess.CreateCommand(); // set the stored procedure name comm.CommandText = "CommerceLibOrderUpdateStatus"; // create a new parameter DbParameter param = comm.CreateParameter(); param.ParameterName = "@OrderID"; param.Value = orderID; param.DbType = DbType.Int32; comm.Parameters.Add(param); // create a new parameter param = comm.CreateParameter(); param.ParameterName = "@Status"; param.Value = status; param.DbType = DbType.Int32; comm.Parameters.Add(param); // execute the stored procedure GenericDataAccess.ExecuteNonQuery(comm); }

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Figure 7-1. Application for retrieving SQL Server data in XML format As you can see, the application consists of a text box for entering SELECT queries. The Execute button allows you to execute the query. The XML results returned from the query are displayed in a browser window. Before you write the code for the Click event handler of the Execute button, make sure to including the namespaces as shown in Listing 7-1. Listing 7-1. Importing Relevant Namespaces using using using using using System.Data; System.Data.SqlClient; System.Xml; System.IO; System.Diagnostics;

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The SetOrderAuthCodeAndReference Method This method uses the CommerceLibOrderSetAuthCode stored procedure to set the AuthCode and Reference fields in Orders. Add it to your CommerceLibAccess class: public static void SetOrderAuthCodeAndReference(int orderID, string authCode, string reference) { // get a configured DbCommand object DbCommand comm = GenericDataAccess.CreateCommand(); // set the stored procedure name comm.CommandText = "CommerceLibOrderSetAuthCode"; // create a new parameter DbParameter param = comm.CreateParameter(); param.ParameterName = "@OrderID"; param.Value = orderID; param.DbType = DbType.Int32; comm.Parameters.Add(param); // create a new parameter param = comm.CreateParameter(); param.ParameterName = "@AuthCode"; param.Value = authCode; param.DbType = DbType.String; param.Size = 50; comm.Parameters.Add(param); // create a new parameter param = comm.CreateParameter(); param.ParameterName = "@Reference"; param.Value = reference; param.DbType = DbType.String; param.Size = 50; comm.Parameters.Add(param); // execute the stored procedure GenericDataAccess.ExecuteNonQuery(comm); } The SetOrderDateShipped Method The last method to add to CommerceLibAccess, SetOrderDateShipped, is as follows: public static void SetOrderDateShipped(int orderID) { // get a configured DbCommand object DbCommand comm = GenericDataAccess.CreateCommand(); // set the stored procedure name comm.CommandText = "CommerceLibOrderSetDateShipped";

The Click event handler of the Execute button contains the code shown in Listing 7-2. Listing 7-2. Using the ExecuteXmlReader() Method private void button1_Click(object sender, EventArgs e) { SqlConnection cnn = new SqlConnection(@"data source=.\sqlexpress;initial catalog=northwind;integrated security=true"); SqlCommand cmd = new SqlCommand(); cmd.Connection = cnn; cmd.CommandType = CommandType.Text; cmd.CommandText = textBox1.Text + " FOR XML AUTO"; cnn.Open();

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