WebClient.UploadStringAsync Method (Uri, String)
April 12, 2014
Uploads the specified string to the specified resource. This method does not block the calling thread.
Assembly: System.Net (in System.Net.dll)
The address parameter is null
data is null.
There is not enough memory to continue the execution of the program.
The execution stack overflowed because it contains too many nested method calls.
A call was made to the Thread.Abort method to destroy a thread.
The URI formed by combining BaseAddress and address is invalid.
There was no response from the server hosting the resource.
This method sends a string to a resource. The string is sent asynchronously using thread resources that are automatically allocated from the thread pool. Before uploading the string, this method converts it to a Byte array using the encoding specified in the Encoding property. To receive notification when the string upload completes, you can add an event handler to the UploadStringCompleted event.
This method does not block the calling thread while the string is being sent.
Asynchronous operations that have not completed can be canceled using the CancelAsync method.
If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data.
This method uses the POST command to upload an HTTP resource.