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In this chapter, we ve looked at stored procedures that return results; that is, those that contain SELECT queries. Stored procedures aren t limited to just SELECT queries, though. INSERT, UPDATE, and DELETE queries, which were introduced in 8, also are perfectly valid queries to use in stored procedures. We re not going to walk through any step-by-step examples of using these other queries, as the procedure for creating the stored procedure is the same. Instead, we ll look at stored procedure replacements for some of the queries and query batches that we looked at in 8. For instance, consider the UPDATE query that you used in Player_Update.aspx in 8. You would create the stored procedure using the following query: CREATE PROCEDURE spPlayerUpdate @PlayerID int, @Name varchar(50), @ManufacturerID int, @Cost decimal(10,2), @Storage varchar(50) AS UPDATE Player SET PlayerName = @Name, PlayerManufacturerID = @ManufacturerID, PlayerCost = @Cost, PlayerStorage = @Storage WHERE PlayerID = @PlayerID If you look back to 8, you ll see that the UPDATE query itself is the same query as you passed to the database. Instead of passing the UPDATE query to the database, you would pass the name of the stored procedure and call ExecuteNonQuery() to execute the stored procedure. You can call the stored procedure in the same way as the SQL query and also define the parameters in the same way: myCommand.Parameters.AddWithValue("@PlayerID", Request.QueryString["PlayerID"]); myCommand.Parameters.AddWithValue("@Name", PlayerName.Text); myCommand.Parameters.AddWithValue("@ManufacturerID", ManufacturerList.SelectedValue); myCommand.Parameters.AddWithValue("@Cost", PlayerCost.Text); myCommand.Parameters.AddWithValue("@Storage", PlayerStorage.Text); progress bar code in vb.net 2008 How to make Barcode in vb . net - CodeProject
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Development Conditions: Visual Studio 2005/2008/2010, .NET Version 2.0 or above, IIS (Microsoft Internet Information Services), C#.NET, or VB. The spPlayerUpdate stored procedure, in this case, is a direct replacement for a single query that you passed to the database You have five parameters to the SQL query, and you have the same five parameters to the stored procedure As you re using named parameters, the order that you add the parameters doesn t matter, but it is good practice to keep the ordering consistent in the stored procedure and code If nothing else, it makes it easier to see whether any of the parameters have been missed As you saw with the output parameters example, a stored procedure can do more than execute one query You can use this to your advantage to simplify the Player_Insertaspx page When adding a new Player to the database, you need to return the PlayerID of the newly created Player. codeproject vb.net barcode generator Free .NET Barcode Component - Generate, Read and Scan 1D 2D ...
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It is easy to download VB . NET Barcode Generator Component trial version. Then please unzip this package, and get your required barcode control dll. And add ... Our next step is to write a JavaScript class that will retrieve suggestions from the suggestionAction() function we just wrote when the user types a search query. The way this will work is to monitor the search query input box. When the user types a query, an Ajax request will be performed to retrieve those results and then display them to the user. One important thing to be aware of is that you don t want to retrieve the suggestions every time the user enters a single character, since this will not only slow down the user s experience but will also consume excessive server resources. Thus, the way it will work is to display search suggestions only after the user has stopped typing. To achieve this, every time the user types a key, we begin a timer. Once the timer expires, we initiate the Ajax request. If the user presses another key before the timer expires, the existing timer is cancelled, and a new one is created. Listing 12-29 shows the beginning of the SearchSuggestor class. We store this in a file called SearchSuggestor.class.js in the ./htdocs/js directory. First we set the URL that provides the search suggestions (which is the suggestionAction() function we created in the previous section). We then set the timer delay of 200 milliseconds (or 0.2 seconds). Additionally, we define a placeholder to hold the timer returned from the setTimeout() function. Finally, we add a placeholder to hold the current query. Technically, strings can never be modified. All the string methods that appear to change a string actually return a copy of the string that has the changes. Trim(), TrimEnd(), and TrimStart() PadLeft() and PadRight() This requires two queries that you executed as a query batch in 8 But with a stored procedure, you can execute both of the queries in the same stored procedure: CREATE PROCEDURE spPlayerInsert @Name varchar(50), @ManufacturerID int, @Cost decimal(10,2), @Storage varchar(50) AS INSERT Player (PlayerName, PlayerManufacturerID, PlayerCost, PlayerStorage) VALUES (@Name, @ManufacturerID, @Cost, @Storage); SELECT SCOPE_IDENTITY(); You first insert the Player into the database and then return the SCOPE_IDENTITY() value This returns the PlayerID from the stored procedure, and you can access this using the ExecuteScalar() method This is the same technique as you saw for retrieving the PlayerID from the query batch in 8: intPlayerID = ConvertToInt32(myCommandExecuteScalar()); The DELETE query from Player_Deleteaspx can also be used in a stored procedure very easily. Note Although we specify the delay here in seconds, setTimeout() accepts the delay in milliseconds. printing barcode vb.net Barcode for VB . NET Control - VB . NET projects to print 2d barcodes ...
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