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(Microsoft s code auto-completion technology), code formatting, database integration with the ability to design databases visually, debugging, and much more. For developing BalloonShop, we ll use Visual Web Developer 2008 Express Edition, which contains all the features you ll need, but you can use Visual Studio if you have it. In the latter case, you may find that a few menu options are named differently than what is presented in the book, but you ll find all the necessary features in the expected places. The typical web server used to run ASP.NET applications is IIS (Internet Information Services), but Visual Web Developer 2008 and Visual Studio 2008 include an integrated web server so that you can run your ASP.NET applications even if you don t have IIS installed on your development machine. This is good news for users of the Home editions of Windows XP and Windows Vista, who can t install IIS on their machines because it isn t supported by the operating system. Although we ll use Visual Web Developer 2008 Express Edition for writing the BalloonShop project, it s important to know that you don t have to. ASP.NET and the C# and VB .NET compilers are available as free downloads at as part of the .NET Framework .SDK (software development kit), and a simple editor such as Notepad is enough to create any kind of web page. qr code reader

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Find out most popular NuGet qrcode Packages. ... Ding. QRCode . ZXing . Ding. QRCode . ZXing 是基于. net core平台开发的应用框架中的 ZXing . Net 二维码操作类库 。

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NET component that can be used to encode and decode QRCode . QRCode is a 2 dimensional bar code that originated in Japan. Nowadays it is widely used in ...

In the beginning of this chapter, you learned that there are three flavors of serialization based on the format (binary, XML, and SOAP). Serializing objects into binary format is outside the scope of this book, and you have already learned how to serialize objects in XML format. Now it s time to learn how objects can be serialized in SOAP format. SOAP is an industry standard that forms one of the pillars of web services. Though SOAP is used extensively along with web services, you can use it as an encoding format for object serialization. When you serialize objects by using the XmlSerializer class, you need not do anything special to the classes themselves. However, when you wish to use SOAP as a serialization format, you must mark your classes with the [Serializable] attribute. Only then can your classes be serialized. The SoapFormatter class takes care of all the intricacies of serializing your objects in SOAP format. The SoapFormatter class resides in the System.Runtime.Serialization.Formatters.Soap namespace, which physically resides in the System.Runtime.Serialization.Formatters.Soap.dll assembly. Let s revisit the application that we developed when we began this chapter (see Figure 8-1) and modify it to use SoapFormatter instead of XmlSerializer. The user interface of the application remains unchanged, but the way we serialize and deserialize the objects differs. First, you need to mark the Employee class with the [Serializable] attribute. The modified Employee class is shown in Listing 8-17.

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BalloonShopConfiguration.SearchIndex, BalloonShopConfiguration.ResponseGroups); // If any problems occur, we prefer to send back empty result set // instead of throwing exception try { // Load the Amazon response XmlDocument responseXmlDoc = new XmlDocument(); responseXmlDoc.Load(amazonRequest); // Prepare XML document for searching XmlNamespaceManager xnm = new XmlNamespaceManager( responseXmlDoc.NameTable); xnm.AddNamespace("amz", ""); // Get the list of Item nodes XmlNodeList itemNodes = responseXmlDoc.SelectNodes "/amz:ItemSearchResponse/amz:Items/amz:Item", xnm); // Copy node data to the DataTable foreach (XmlNode itemNode in itemNodes) { try { // Create a new datarow and populate it with data DataRow dataRow = responseTable.NewRow(); dataRow["ASIN"] = itemNode["ASIN"].InnerText; dataRow["ProductName"] = itemNode["ItemAttributes"]["Title"] .InnerText; dataRow["ProductImageUrl"] = itemNode["SmallImage"]["URL"] .InnerText; dataRow["ProductPrice"] = itemNode["OfferSummary"] ["LowestNewPrice"]["FormattedPrice"].InnerText; // Add the row to the results table responseTable.Rows.Add(dataRow); } catch { // Ignore products with incomplete information } } } catch { // Ignore all possible errors } return responseTable; }

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Listing 8-17. Marking a Class with the [Serializable] Attribute [Serializable] public class Employee { private int intID; private string strFName; private string strLName; private string strHPhone; private string strNotes; public int EmployeeID { get { return intID; } set { intID = value; } } public string FirstName { get { return strFName; } set { strFName = value; } } public string LastName { get { return strLName; } set { strLName = value; } } qr code scanner

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VB . NET barcode scanner is a robust and mature . net barcode recognition component for VB . NET projects. You can easily scan and decode linear, 2d barcodes from image documents in your VB . NET class, console application, ASP. NET web projects, and VB . NET Windows software. You may also be interested in: Java Barcode Reader .

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