Webclient

What is the different between WebClient and WebRequest HTTP class in .NET?

WebRequest is an abstracted basis category. They use it through derivative classes - HTMLWebRequest and FileMakerWebRequest. Use the WebRequest Build button to build an WebRequest copy. WebRequest also has its own WebRequest inheritance file types, namely FileMaker Server, FileMaker Server, and WebRequest. Normally you would use WebRequest to make a query and revert to either HTMLWebRequest, FileWebRequest oder HTMLWebRequest, depending on your query.

The WebClient provides general functions for transmitting and retrieving information from a source that has been designated by a URI. Put quite plainly, it is a superordinate abstract of HTMLWebRequest. These ' joint operations' distinguish the WebClient from HTMLWebRequest, as the following example shows: "http://stackverflow.com " ); There are also DownloadData and DownloadFile operation under WebClient instances.

Those joint actions also make the coding of what we would normally do with HTMLRequest easier. We need to use HTMLRequest to get the answer to our query, instance StreamReader to see the answer, and eventually translate the results into the expected typ. WebClient allows us to easily access DownloadData, DownloadFile or DownloadString.

Please be aware that WebClient.DownloadString does not take into account the coding of the requested resources. ATTENTION: Generally "WebClient needs only a few rows of coding in comparison to Webrequest".

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Download the resources as a byte arrays from the specified URI. Download the resources as a byte arrays from the specified URI. public: cli::array ^ DownloadData (System::String^ address ); ; A byte arrays with the retrieved resources. Addressparameter is zero. URI created by the combination of BaseAddress and Adresse is not valid.

There was an exception when you downloaded files. Multi-thread ed call of the methode. In the following example, the system retrieves information from a remote site and shows the information it returns. We assume that remotesUri contains a URI that is effective for the required information. "String^ RemoteUri = Console::ReadLine(); // Creating a new WebClient entity.

web client^ web client^ web client = web client web client; // retrieve homepage datas. Console::WriteLine( "Downloading {0}", remoteUri); // Get the web resources and store them in a file cache. array^ myDataBuffer = myWebClient->DownloadData( remoteUri); // View the files that have been called. Bit^ file= Encoding::ASCII->GetString( myDataBuffer); Console::WriteLine( download); Console::WriteLine( "Download successfully. " ); "\nPlease type in a URI (e.g. http://www.contoso. com):

"{\a6}; distroUri = console. ReadLine (); WebClient(); "Download " + remoteUri); [] myDataBuffer = aWebClient. DownlaodData (remoteUri); downlaod = Encoding.ASCII. WriteLine (download); "Download successfully. "a new WebClient instantiation. Please click here to get the homepage information. The DownloadData () methods take a 'uriRemote. ToString( )' and loads the web resources and stores them in a cache.

Displays the files that have been loaded. DownloadData loads the resources with the URI specified by the addressing parameters. Deploys this blocking mode when fetching the resources. Use one of the methods DownloadDataAsync to dowload a source and resume execution while you wait for the reply from the host. When the BaseAddress property is not an empty character set ("") and the adress does not contain an URI, the adress must be a URI combining with the BaseAddress to produce the URI of the queried information.

When the QueryString is not an empty character chain attribute, it is attached to the adress. Use the RETR method to get an FTP asset. The GET is used for an HTTP source. Loads the resources as a byte arrays from the specified URI. public: cli: ^ DownloadData (Uri is ^ address); ; The URI displayed by the Uri objects from which files can be downloaded.

This is a byte arrays containing the resources that have been fetched. Addressparameter is zero. DownloadData loads the resources with the URI specified by the addressing parameters. Deploys this blocking mode when fetching the resources. Use one of the DownloadDataAsync options to dowload a source and resume execution while you wait for the reply from the host.

When the BaseAddress Property is not an empty character set ("") and the adress does not contain an URI, the adress must be a URI combining with the BaseAddress to produce the URI of the queried information. When the QueryString is not an empty character chain attribute, it is attached to the adress.

Use the RETR command to browse and retrieve an FTP asset. The GET is used for an HTTP source.