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RETURN LEN(@BiggerPhrase) - LEN(@Phrase) END 2. Now add the SearchCatalog stored procedure. This stored procedure uses WordCount to calculate the search results. Using the steps you already know, add this stored procedure to your BalloonShop database: CREATE PROCEDURE SearchCatalog (@DescriptionLength INT, @PageNumber TINYINT, @ProductsPerPage TINYINT, @HowManyResults SMALLINT OUTPUT, @AllWords BIT, @Word1 VARCHAR(15) = NULL, @Word2 VARCHAR(15) = NULL, @Word3 VARCHAR(15) = NULL, @Word4 VARCHAR(15) = NULL, @Word5 VARCHAR(15) = NULL) AS /* Create the table variable that will contain the search results */ DECLARE @Products TABLE (RowNumber SMALLINT IDENTITY (1,1) NOT NULL, ProductID INT, Name VARCHAR(50), Description VARCHAR(1000), Price MONEY, Image1FileName VARCHAR(50), Image2FileName VARCHAR(50), Rank INT) /* Populate @Products for an any-words search */ IF @AllWords = 0 INSERT INTO @Products SELECT ProductID, Name, SUBSTRING(Description, 1, @DescriptionLength) + '...' AS Description, Price, Image1FileName, Image2FileName, 3 * dbo.WordCount(@Word1, Name) + dbo.WordCount(@Word1, Description) + 3 * dbo.WordCount(@Word2, Name) + dbo.WordCount(@Word2, Description) + 3 * dbo.WordCount(@Word3, Name) + dbo.WordCount(@Word3, Description) + 3 * dbo.WordCount(@Word4, Name) + dbo.WordCount(@Word4, Description) + 3 * dbo.WordCount(@Word5, Name) + dbo.WordCount(@Word5, Description) AS Rank FROM Product ORDER BY Rank DESC /* Populate @Products for an all-words search */ IF @AllWords = 1

Figure 5-2. Class files belong in the App_Code folder. 4. Replace the code in Manufacturer.cs with the following: using System.Text; public class Manufacturer { public string Name; public string Country; public string Email; public string Website; public Manufacturer() { } public override string ToString() { StringBuilder sbDescription = new StringBuilder(); // add the name sbDescription.Append("Name: "); sbDescription.Append(this.Name); sbDescription.Append("<BR/>");

Clear()

The next example uses session state to store several Furniture data objects. The data object combines a few related variables and uses a special constructor so it can be created and initialized in one easy line. Rather than use full property procedures, the class takes a shortcut and uses public member variables.

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INSERT INTO @Products SELECT ProductID, Name, SUBSTRING(Description, 1, @DescriptionLength) + '...' AS Description, Price, Image1FileName, Image2FileName, (3 * dbo.WordCount(@Word1, Name) + dbo.WordCount (@Word1, Description)) * CASE WHEN @Word2 IS NULL THEN 1 ELSE 3 * dbo.WordCount(@Word2, Name) + dbo.WordCount(@Word2, Description) END * CASE WHEN @Word3 IS NULL THEN 1 ELSE 3 * dbo.WordCount(@Word3, Name) + dbo.WordCount(@Word3, Description) END * CASE WHEN @Word4 IS NULL THEN 1 ELSE 3 * dbo.WordCount(@Word4, Name) + dbo.WordCount(@Word4, Description) END * CASE WHEN @Word5 IS NULL THEN 1 ELSE 3 * dbo.WordCount(@Word5, Name) + dbo.WordCount(@Word5, Description) END AS Rank FROM Product ORDER BY Rank DESC /* Save the number of searched products in an output variable */ SELECT @HowManyResults = COUNT(*) FROM @Products WHERE Rank > 0 /* Send back the requested products */ SELECT ProductID, Name, Description, Price, Image1FileName, Image2FileName, Rank FROM @Products WHERE Rank > 0 AND RowNumber BETWEEN (@PageNumber-1) * @ProductsPerPage + 1 AND @PageNumber * @ProductsPerPage ORDER BY Rank DESC

// add the city sbDescription.Append("Country: "); sbDescription.Append(this.Country); sbDescription.Append("<BR/>"); // add the email sbDescription.Append("Email: "); sbDescription.Append("<a href='mailto:"); sbDescription.Append(this.Email); sbDescription.Append("'>"); sbDescription.Append(this.Email); sbDescription.Append("</a>"); sbDescription.Append("<BR/>"); // add the website sbDescription.Append("Website: "); sbDescription.Append("<a href='"); sbDescription.Append(this.Website); sbDescription.Append("'>"); sbDescription.Append(this.Website); sbDescription.Append("</a>"); sbDescription.Append("<BR/>"); return (sbDescription.ToString()); } } 5. Add a new Web Form to the site called DataReader_Iterating.aspx. In the Source view, change the name of the page to Iterating through a DataReader. 6. In the Design view, add a Label to the blank page. You ll use this to demonstrate that your objects have been created. Set its Text property to an empty string. 7. In the Source view of the page, make sure the correct data provider is included at the top of the page, like so: <%@ Page Language="C#" %> <%@ Import Namespace="System.Data.SqlClient" %> 8. The second piece of code to add is for the Page_Load handler: protected void Page_Load(object sender, EventArgs e) { // create the connection SqlConnection myConnection = new SqlConnection();

Public Class Furniture Public Name As String Public Description As String Public Cost As Double Public Sub New(ByVal name As String, _ ByVal description As String, ByVal cost As Double) Me.Name = name Me.Description = description Me.Cost = cost End Sub End Class

Three Furniture objects are created the first time the page is loaded, and they re stored in session state. The user can then choose from a list of furniture piece names. When a selection is made, the corresponding object will be retrieved, and its information will be displayed, as shown in Figure 9-9.

try { // configure the connection string strConnectionString = ConfigurationManager. ConnectionStrings["SqlConnectionString"].ConnectionString; myConnection.ConnectionString = strConnectionString; // create the command string strCommandText = "SELECT ManufacturerName, ManufacturerCountry, ManufacturerEmail, ManufacturerWebsite FROM Manufacturer ORDER BY ManufacturerName"; SqlCommand myCommand = new SqlCommand(strCommandText, myConnection); // open the database connection myConnection.Open(); // run the query SqlDataReader myReader = myCommand.ExecuteReader(); // parse the results while (myReader.Read()) { // create the manufacturer object Manufacturer objManufacturer = new Manufacturer (); objManufacturer.Name = Convert.ToString(myReader["ManufacturerName"]); objManufacturer.Country = Convert.ToString(myReader["ManufacturerCountry"]); objManufacturer.Email = Convert.ToString(myReader["ManufacturerEmail"]); objManufacturer.Website = Convert.ToString(myReader["ManufacturerWebsite"]); // output the manufacturer object details Label1.Text += objManufacturer.ToString() + "<BR/>"; } // close the reader myReader.Close(); } finally { // close the database connection myConnection.Close(); } }

In the first step of the exercises, you wrote the WordCount function. This function returns the number of times the @Word string appears in @Phrase (@Word and @Phrase are its input parameters). We discussed how this function works earlier in this chapter.

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