Lập trình ASP.net potx

---2 Trần Phượng Hoàng – PTN BMCNPM – Khoa CNTT – DHKHTN 1 Xây dưng thành phần Data Tier 1.1 Tạo các Data Table 1.1.1 Category USE BalloonShop GO CREATE TABLE Category CategoryID INT

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1 Nguyễn Phạm Phương Nam - Bộ môn CNPM – Khoa CNTT - DHKHTN

1

Môn học:

Phát triển ứng dụng Web nâng cao với ASP.NET

Product Catalog – P2

TR ƯỜ NG ĐẠ I H Ọ C KHOA H Ọ C T Ự NHIÊN

KHOA CÔNG NGH Ệ THÔNG TIN

B Ộ MÔN CÔNG NGH Ệ PH Ầ N M Ề M

-

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-2 Trần Phượng Hoàng – PTN BMCNPM – Khoa CNTT – DHKHTN

1 Xây dưng thành phần Data Tier

1.1 Tạo các Data Table

1.1.1 Category

USE BalloonShop

GO

CREATE TABLE Category(

CategoryID INT IDENTITY( , ) NOT NULL,

DepartmentID INT NOT NULL,

Name NVARCHAR(50) NOT NULL,

Description NVARCHAR(1000) NULL,

CONSTRAINT PK_Category_1 PRIMARY KEY CLUSTERED(CategoryID ASC)

INSERT INTO Category (CategoryID, DepartmentID, Name, Description

VALUES 1 1, 'Love & Romance', 'Here''s our collection of balloons with

romantic messages.')

VALUES 2 1, 'Birthdays', 'Tell someone "Happy Birthday" with one of these wonderful balloons!')

VALUES 3 1, 'Weddings', 'Going to a wedding? Here''s a collection of

balloons for that special event!')

VALUES 4 2, 'Message Balloons', 'Why write on paper, when you can deliver your message on a balloon?')

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VALUES 5 2, 'Cartoons', 'Buy a balloon with your child''s favorite cartoon character!')

VALUES 6 2, 'Miscellaneous', 'Various baloons that your kid will most

CREATE TABLE Product(

ProductID INT IDENTITY( , ) NOT NULL,

Name NVARCHAR(50) NOT NULL,

Description NVARCHAR(MAX) NOT NULL,

Price MONEY NOT NULL,

Image1FileName NVARCHAR(50) NULL,

Image2FileName NVARCHAR(50) NULL,

OnCatalogPromotion BIT NOT NULL,

OnDepartmentPromotion BIT NOT NULL,

CONSTRAINT PK_Product PRIMARY KEY CLUSTERED ProductID ASC)

INSERT INTO Product(ProductID, Name, Description, Price, Image1FileName,

Image2FileName, OnCatalogPromotion, OnDepartmentPromotion )

VALUES 1 'I Love You (Simon Elvin)', 'An adorable romantic balloon by Simon Elvin You''ll fall in love with the cute bear bearing a bouquet of roses, a heart with I Love You, and a card.', 121.9900, 't0326801.jpg', '0326801.jpg',

0 1)

GO

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4 Trần Phượng Hoàng – PTN BMCNPM – Khoa CNTT – DHKHTN

Ghi chú: Sử dụng các file script được cung cấp sẵn để tạo đầy đủ CSDL

1.1.3 ProductCategory

USE BalloonShop

GO

CREATE TABLE ProductCategory(

ProductID INT NOT NULL,

CategoryID INT NOT NULL,

CONSTRAINT PK_ProductCategory PRIMARY KEY CLUSTERED ProductID ASC,

CategoryID ASC)

)

GO

ALTER TABLE ProductCategory WITH CHECK ADD CONSTRAINT

FK_ProductCategory_Category FOREIGN KEY(CategoryID)

REFERENCES Category (CategoryID)

GO

ALTER TABLE ProductCategory WITH CHECK ADD CONSTRAINT

FK_ProductCategory_Product FOREIGN KEY(ProductID)

REFERENCES Product (ProductID)

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declare a new TABLE variable

DECLARE @Products TABLE

populate the table variable with the complete list of products

INSERT INTO @Products

SELECT ROW_NUMBER() OVER ORDER BY Product.ProductID),

ProductID, Name,

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CASE WHEN LEN(Description) <= @DescriptionLength THEN Description ELSE SUBSTRING(Description, 1, @DescriptionLength) + ' ' END

AS Description, Price, Image1FileName, Image2FileName,

OnCatalogPromotion, OnDepartmentPromotion

FROM Product

WHERE OnCatalogPromotion = 1

return the total number of products using an OUTPUT variable

SELECT @HowManyProducts = COUNT(ProductID) FROM @Products

extract the requested page of products

SELECT ProductID, Name, Description, Price, Image1FileName,

Image2FileName, OnCatalogPromotion, OnDepartmentPromotion

FROM @Products

WHERE RowNumber > (@PageNumber - 1) * @ProductsPerPage

AND RowNumber <= @PageNumber * @ProductsPerPage

SELECT ROW_NUMBER() OVER ORDER BY Product.ProductID),

Product.ProductID, Name,

CASE WHEN LEN(Description) <= @DescriptionLength THEN Description ELSE SUBSTRING(Description, 1, @DescriptionLength) + ' ' END

FROM Product INNER JOIN ProductCategory

ON Product.ProductID = ProductCategory.ProductID

WHERE ProductCategory.CategoryID = @CategoryID

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FROM @Products

SELECT ROW_NUMBER() OVER ORDER BY ProductID) AS Row,

ProductID, Name, SUBSTRING(Description, 1, @DescriptionLength)

+ ' ' AS Description,

Price, Image1FileName, Image2FileName, OnCatalogPromotion,

OnDepartmentPromotion

FROM

(SELECT DISTINCT Product.ProductID, Product.Name,

CASE WHEN LEN(Product.Description) <= @DescriptionLength

THEN Product.Description

ELSE SUBSTRING(Product.Description, 1, @DescriptionLength) +

' ' END

FROM Product INNER JOIN ProductCategory

ON Product.ProductID = ProductCategory.ProductID

INNER JOIN Category

ON ProductCategory.CategoryID = Category.CategoryID WHERE Product.OnDepartmentPromotion = 1

AND Category.DepartmentID = @DepartmentID

) AS ProductOnDepPr

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FROM @Products

</appSettings>

2.2 BalloonShopConfiguration class

- Thêm và thay đổi một số thành phần

private readonly static int productsPerPage;

public static int ProductsPerPage

{

get { return BalloonShopConfiguration.productsPerPage; }

}

private readonly static int productDescriptionLength;

public static int ProductDescriptionLength

{

get { return BalloonShopConfiguration.productDescriptionLength; } }

private readonly static string siteName;

public static string SiteName

{

get { return BalloonShopConfiguration.siteName; }

}

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public string Name;

public string Description;

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- Thêm method (hàm) GetDepartmentDetails

public static DepartmentDetails GetDepartmentDetails(string departmentId) {

// get a configured DbCommand object

DbCommand comm = GenericDataAccess.CreateCommand();

// set the stored procedure name

comm.CommandText = "GetDepartmentDetails";

// create a new parameter

DbParameter param = comm.CreateParameter();

param.ParameterName = "@DepartmentID";

param.Value = departmentId;

param.DbType = DbType.Int32;

comm.Parameters.Add(param);

// execute the stored procedure

DataTable table = GenericDataAccess.ExecuteSelectCommand(comm);

// wrap retrieved data into a DepartmentDetails object

DepartmentDetails details = new DepartmentDetails();

if (table.Rows.Count > 0)

{

details.Name = table.Rows[0]["Name"].ToString();

details.Description = table.Rows[0]["Description"].ToString(); }

// return department details

return details;

}

2.3.2 CategoryDetails

- Thêm thành phần struct CategoryDetails

public struct CategoryDetails

{

public int DepartmentId;

public string Name;

}

- Thêm method (hàm) GetCategoryDetails

public static CategoryDetails GetCategoryDetails(string categoryId)

{

comm.CommandText = "GetCategoryDetails";

param.ParameterName = "@CategoryID";

param.Value = categoryId;

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// wrap retrieved data into a CategoryDetails object

CategoryDetails details = new CategoryDetails();

{

details.DepartmentId =

Int32.Parse(table.Rows[0]["DepartmentID"].ToString());

details.Name = table.Rows[0]["Name"].ToString();

details.Description = table.Rows[0]["Description"].ToString(); }

// return department details

return details;

}

2.3.3 ProductDetails

- Thêm thành phần struct ProductDetails

public struct ProductDetails

{

public string Name;

public decimal Price;

public string Image1FileName;

public string Image2FileName;

public bool OnDepartmentPromotion;

public bool OnCatalogPromotion;

}

- Thêm method (hàm) GetProductDetails

public static ProductDetails GetProductDetails(string productId)

{

comm.CommandText = "GetProductDetails";

param.ParameterName = "@ProductID";

param.Value = productId;

// wrap retrieved data into a ProductDetails object

ProductDetails details = new ProductDetails();

{

// get the first table row

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DataRow dr = table.Rows[0];

// get product details

details.Name = dr["Name"].ToString();

details.Description = dr["Description"].ToString();

details.Price = Decimal.Parse(dr["Price"].ToString());

details.Image1FileName = dr["Image1FileName"].ToString();

details.Image2FileName = dr["Image2FileName"].ToString();

- Thêm method (hàm) GetCategoryinDepartment

public static DataTable GetCategoriesInDepartment(string departmentId)

{

comm.CommandText = "GetCategoriesInDepartment";

param.ParameterName = "@DepartmentID";

param.Value = departmentId;

return GenericDataAccess.ExecuteSelectCommand(comm);

}

- Thêm method (hàm) GetProductsOnCatalogPromotion

public static DataTable GetProductsOnCatalogPromotion(string pageNumber, out int howManyPages)

{

comm.CommandText = "GetProductsOnCatalogPromotion";

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param = comm.CreateParameter();

param.ParameterName = "@ProductsPerPage";

param.Value = BalloonShopConfiguration.ProductsPerPage;

param.ParameterName = "@HowManyProducts";

param.Direction = ParameterDirection.Output;

// execute the stored procedure and save the results in a DataTable

// calculate how many pages of products and set the out parameter

int howManyProducts = Int32.Parse(comm.Parameters

["@HowManyProducts"].Value.ToString());

howManyPages = (int)Math.Ceiling((double)howManyProducts /

(double)BalloonShopConfiguration.ProductsPerPage);

// return the page of products

return table;

}

- Thêm method (hàm) GetProductsOnCatalogPromotion

public static DataTable GetProductsOnDepartmentPromotion

(string departmentId, string pageNumber, out int howManyPages)

{

comm.CommandText = "GetProductsOnDepartmentPromotion";

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param.ParameterName = "@ProductsPerPage";

param.ParameterName = "@HowManyProducts";

param.Direction = ParameterDirection.Output;

// execute the stored procedure and save the results in a DataTable

// calculate how many pages of products and set the out parameter

int howManyProducts = Int32.Parse

(comm.Parameters["@HowManyProducts"].Value.ToString());

howManyPages = (int)Math.Ceiling((double)howManyProducts /

(double)BalloonShopConfiguration.ProductsPerPage);

// return the page of products

return table;

}

- Thêm method (hàm) GetProductsInCategory

public static DataTable GetProductsInCategory

(string categoryId, string pageNumber, out int howManyPages)

{

comm.CommandText = "GetProductsInCategory";

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