qr code generator c# asp.net Networking Through the Internet Using SystemNet in Visual C#.NET

Create QR-Code in Visual C#.NET Networking Through the Internet Using SystemNet

Networking Through the Internet Using SystemNet
QR Code Generation In Visual C#
Using Barcode creator for .NET Control to generate, create QR Code image in .NET framework applications.
Scan QR Code ISO/IEC18004 In Visual C#
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
Now the network-based exceptions that the networking methods might generate have been caught For example, if you change the call to Create( ) as shown here,
Bar Code Generator In Visual C#
Using Barcode drawer for Visual Studio .NET Control to generate, create barcode image in .NET applications.
Barcode Decoder In Visual C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET applications.
WebRequestCreate("http://wwwMcGraw-Hillcom/moonrocket");
Encoding QR Code JIS X 0510 In .NET Framework
Using Barcode printer for ASP.NET Control to generate, create QR image in ASP.NET applications.
Denso QR Bar Code Creator In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create QR image in .NET applications.
and then recompile and run the program, you will see this output:
Draw QR In VB.NET
Using Barcode encoder for VS .NET Control to generate, create QR Code image in Visual Studio .NET applications.
Paint UPC - 13 In Visual C#
Using Barcode maker for VS .NET Control to generate, create EAN 13 image in Visual Studio .NET applications.
Network Error: The remote server returned an error: (404) Not Found Status code: ProtocolError
Bar Code Creator In Visual C#.NET
Using Barcode printer for VS .NET Control to generate, create bar code image in .NET applications.
ANSI/AIM Code 128 Printer In Visual C#
Using Barcode creation for Visual Studio .NET Control to generate, create Code 128A image in .NET framework applications.
Since the McGraw-Hillcom website does not have a directory called moonrocket, this URI is not found, as the output confirms To keep the examples short and uncluttered, most of the programs in this chapter will not contain full exception handling However, your real-world applications must
Code 3/9 Encoder In Visual C#
Using Barcode printer for .NET framework Control to generate, create Code 39 Full ASCII image in .NET framework applications.
Generate GTIN - 12 In C#
Using Barcode generation for .NET Control to generate, create GTIN - 12 image in .NET framework applications.
PART II
Reading Bar Code In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
EAN / UCC - 13 Creation In Java
Using Barcode printer for Java Control to generate, create UCC-128 image in Java applications.
The Uri Class
Data Matrix ECC200 Maker In Objective-C
Using Barcode generation for iPhone Control to generate, create ECC200 image in iPhone applications.
Linear Barcode Generator In VS .NET
Using Barcode creation for ASP.NET Control to generate, create 1D Barcode image in ASP.NET applications.
In Table 26-1, notice that WebRequestCreate( ) has two different versions One accepts the URI as a string This is the version used by the preceding programs The other takes the URI as an instance of the Uri class, which is defined in the System namespace The Uri class encapsulates a URI Using Uri, you can construct a URI that can be passed to Create( ) You can also dissect a Uri, obtaining its parts Although you don t need to use Uri for many simple Internet operations, you may find it valuable in more sophisticated situations Uri defines several constructors Two commonly used ones are shown here: public Uri(string uriString) public Uri(Uri baseUri, string relativeUri) The first form constructs a Uri given a URI in string form The second constructs a Uri by adding a relative URI specified by relativeUri to an absolute base URI specified by baseUri An absolute URI defines a complete URI A relative URI defines only the path Uri defines many fields, properties, and methods that help you manage URIs or that give you access to the various parts of a URI Of particular interest are the properties shown here:
Generate Data Matrix In .NET
Using Barcode generator for Reporting Service Control to generate, create DataMatrix image in Reporting Service applications.
Painting EAN / UCC - 13 In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create EAN-13 image in ASP.NET applications.
Property public string Host { get; } public string LocalPath { get; } public string PathAndQuery { get; } public int Port { get; } public string Query { get; } public string Scheme { get; } Description Obtains the name of the server Obtains the local file path Obtains the absolute path and query string Obtains the port number for the specified protocol For HTTP the port is 80 , Obtains the query string Obtains the protocol
Create Bar Code In None
Using Barcode generation for Font Control to generate, create bar code image in Font applications.
Drawing Code 128A In Objective-C
Using Barcode generation for iPhone Control to generate, create Code 128A image in iPhone applications.
These properties are useful for breaking a URI into its constituent parts The following program demonstrates their use:
// Use Uri using System; using SystemNet;
Part II:
Exploring the C# Library
class UriDemo { static void Main() { Uri sample = new Uri("http://HerbSchildtcom/somefiletxt SomeQuery"); ConsoleWriteLine("Host: " + sampleHost); ConsoleWriteLine("Port: " + samplePort); ConsoleWriteLine("Scheme: " + sampleScheme); ConsoleWriteLine("Local Path: " + sampleLocalPath); ConsoleWriteLine("Query: " + sampleQuery); ConsoleWriteLine("Path and query: " + samplePathAndQuery); } }
The output is shown here:
Host: HerbSchildtcom Port: 80 Scheme: http Local Path: /somefiletxt Query: SomeQuery Path and query: /somefiletxt SomeQuery
Accessing Additional HTTP Response Information
When using HttpWebResponse, you have access to information other than the content of the specified resource This information includes such things as the time the resource was last modified and the name of the server, and is available through various properties associated with the response These properties, which include the six defined by WebResponse, are shown in Table 26-5 The following sections illustrate how to use representative samples
Accessing the Header
You can access the header information associated with an HTTP response through the Headers property defined by HttpWebResponse It is shown here: public WebHeaderCollection Headers{ get; } An HTTP header consists of pairs of names and values represented as strings Each name/ value pair is stored in a WebHeaderCollection This specialized collection stores key/value pairs and can be used like any other collection (See 25) A string array of the names can be obtained from the AllKeys property You can obtain the values associated with a name by calling the GetValues( ) method It returns an array of strings that contains the values associated with the header passed as an argument GetValues( ) is overloaded to accept a numeric index or the name of the header
26:
Copyright © OnBarcode.com . All rights reserved.