qr code generator c# asp.net The Synchronous Methods De ned by WebClient in C#

Creation QR Code 2d barcode in C# The Synchronous Methods De ned by WebClient

The Synchronous Methods De ned by WebClient
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26:
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Method public byte[ ] UploadData(Uri address, string method, byte[ ] data) public byte[ ] UploadFile(string address, string fileName) public byte[ ] UploadFile(Uri address, string fileName) public byte[ ] UploadFile(string address, string method, string fileName) public byte[ ] UploadFile(Uri address, string method, string fileName) public string UploadString(string address, string data) public string UploadString(Uri address, string data) public string UploadString(string address, string method, string data) public string UploadString(Uri address, string method, string data) public byte[ ] UploadValues(string address, NameValueCollection data) public byte[ ] UploadValues(Uri address, NameValueCollection data) public byte[ ] UploadValues(string address, string method, NameValueCollection data) public byte[ ] UploadValues(Uri address, string method, NameValueCollection data)
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TABLE 26-7
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Description Writes the information specified by data to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes the information in the file specified by fileName to the URI specified by address The response is returned Writes the information in the file specified by fileName to the URI specified by address The response is returned Writes the information in the file specified by fileName to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes the information in the file specified by fileName to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes data to the URI specified by address The response is returned Writes data to the URI specified by address The response is returned Writes data to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes data to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes the values in the collection specified by data to the URI specified by address The response is returned Writes the values in the collection specified by data to the URI specified by address The response is returned Writes the values in the collection specified by data to the URI specified by address The response is returned The string passed in method specifies how the information will be written Writes the values in the collection specified by data to the URI specified by address The response is returned The string passed in method specifies how the information will be written
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PART II
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The Synchronous Methods De ned by WebClient (continued)
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Part II:
Printing DataMatrix In VB.NET
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Exploring the C# Library
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The following program demonstrates how to use WebClient to download data into a file:
// Use WebClient to download information into a file using System; using SystemNet; using SystemIO; class WebClientDemo { static void Main() { WebClient user = new WebClient(); string uri = "http://wwwMcGraw-Hillcom"; string fname = "datatxt"; try { ConsoleWriteLine("Downloading data from " + uri + " to " + fname); userDownloadFile(uri, fname); } catch (WebException exc) { ConsoleWriteLine(exc); } userDispose(); ConsoleWriteLine("Download complete"); } }
This program downloads the information at McGrawHillcom and puts it into a file called datatxt Notice how few lines of code are involved By changing the string specified by uri, you can download information from any URI, including specific files Although WebRequest and WebResponse give you greater control and access to more information, WebClient is all that many applications will need It is particularly useful when all you need to do is download information from the Web For example, you might use WebClient to allow an application to obtain documentation updates
APPENDIX
Documentation Comment Quick Reference
# supports three types of comments The first two are // and /* */ The third type is based on XML tags and is called a documentation comment (The term XML comment is also commonly used) A single-line documentation comment begins with /// A multiline documentation comment begins with /** and ends with */ Documentation comments precede the declaration of such things as classes, namespaces, methods, properties, and events Using documentation comments, you can embed information about your program into the program itself When you compile the program, you can have the documentation comments placed into an XML file Documentation comments can also be utilized by the IntelliSense feature of Visual Studio
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