/* Console application that makes GET request to a specified URL and display the response
* as a string to the console. */
static void Main(string[] args)
{
PIWebAPIClient piWebAPIClient = new PIWebAPIClient();
do
{
try
{
Console.Write("Enter URL: ");
string url = Console.ReadLine();
JObject jobj = piWebAPIClient.GetRequest(url);
Console.WriteLine(jobj.ToString());
}
catch (AggregateException ex)
{
foreach (var e in ex.InnerExceptions)
{
Console.WriteLine(e.Message);
}
}
finally
{
Console.WriteLine("Press any key to continue (esc to exit)...");
}
} while (Console.ReadKey().Key != ConsoleKey.Escape);
piWebAPIClient.Dispose();
Console.ReadKey();
}
/* This method takes the username and password specified to use basic authentication to connect to
* PI Web API. It then attempts to resolve the tag path provided and write to the tag. */
private async void writeBtn_Click(object sender, RoutedEventArgs e)
{
string baseUrl = "https://dng-code.osisoft.int/piwebapi"; //change the baseUrl to your PI Web API service
string userName = userNameTextBox.Text;
string password = pwBox.Password;
string tagPath = tagTextBox.Text;
PIWebAPIClient piWebAPIClient = new PIWebAPIClient(userName, password);
try
{
//Resolve tag path
string requestUrl = baseUrl + "/points/?path=" + tagPath;
Task<JObject> tget = piWebAPIClient.GetAsync(requestUrl);
statusTextBlock.Text = "Processing...";
//Attempt to write value to the tag
Object payload = new
{
value = valueTextBox.Text
};
string data = JsonConvert.SerializeObject(payload);
JObject jobj = await tget;
await piWebAPIClient.PostAsync(jobj["Links"]["Value"].ToString(), data);
//Display final results if successful
statusTextBlock.Text = "Write success!";
}
catch (HttpRequestException ex)
{
statusTextBlock.Text = ex.Message;
}
catch (Exception ex)
{
statusTextBlock.Text = ex.Message;
}
finally
{
//We are closing the HttpClient after every write in this simple example. This is not necessary.
piWebAPIClient.Dispose();
}
}