Develop Reference

System.NullReferenceException in HRESULT[] results = group.Write(items, values) //TitaniumAS OPCda

i need an opc client for work, i used TitaniumAS as it's really simple, the read works fine but the write doesnt, i have the exception in the title
The tagID is correct as it works when i read it.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TitaniumAS.Opc.Client.Common;
using TitaniumAS.Opc.Client.Da;
using TitaniumAS.Opc.Client.Da.Browsing;
using System.Threading;
namespace OPCDA
{
class Program
{
static void Main(string[] args)
{
TitaniumAS.Opc.Client.Bootstrap.Initialize();
Uri url = UrlBuilder.Build("Kepware.KEPServerEX.V6");
using (var server = new OpcDaServer(url))
{
server.Connect();
//creating tag group
OpcDaGroup group = server.AddGroup("MyGroup");
group.IsActive= true;
//Write
OpcDaItem int2 = group.Items.FirstOrDefault(i => i.ItemId == "Channel1.Device1.Woord");
OpcDaItem[] items = { int2 };
object[] values = { 15601 };
HRESULT[] results = group.Write(items, values);
}
}
}
}

Methods return type in C#

i am using a method to retrieve data from an OPC DA server using TitaniumAS packages, the problem i am having is that i have a lot of tags to read/write so i have to use methods.
The WriteX method works fines as it doesnt have to return anything but the read does not, well it does its job, it reads but i cannot use that data outside of the method because it was a void method, when i tried to use it as a String method (that's the type of data i need) it says :
Error CS0161 'ReadX(string, string)': not all code paths return a value
PS : note that i am just a beginner in C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TitaniumAS.Opc.Client.Common;
using TitaniumAS.Opc.Client.Da;
using TitaniumAS.Opc.Client.Da.Browsing;
using System.Threading;
using System.Threading.Channels;
using Async;
namespace OPCDA
{
class Program
{
static void Main(string[] args)
{
TitaniumAS.Opc.Client.Bootstrap.Initialize();
Uri url = UrlBuilder.Build("Kepware.KEPServerEX.V6");
using (var server = new OpcDaServer(url))
{
server.Connect();
OpcDaGroup group = server.AddGroup("MyGroup");
group.IsActive = true;
Ascon ascon1 = new Ascon();
ReadX("Channel1.Ascon1.AsconS", ascon1.ALM);
Console.WriteLine("value = {0}", ascon1.ALM);
void WriteX(String Link, String Ascon)
{
var definition1 = new OpcDaItemDefinition
{
ItemId = Link,
IsActive = true
};
OpcDaItemDefinition[] definitions = { definition1 };
OpcDaItemResult[] results = group.AddItems(definitions);
OpcDaItem tag = group.Items.FirstOrDefault(i => i.ItemId == Link);
OpcDaItem[] items = { tag };
object[] Values = { Ascon };
HRESULT[] Results = group.Write(items, Values);
}
string ReadX(String Link, String read)
{
var definition1 = new OpcDaItemDefinition
{
ItemId = Link,
IsActive = true
};
OpcDaItemDefinition[] definitions = { definition1 };
OpcDaItemResult[] results = group.AddItems(definitions);
OpcDaItemValue[] values = group.Read(group.Items, OpcDaDataSource.Device);
read = Convert.ToString(values[0].Value);
}
}
}
}
}

the first step was to state the return like this :
return Convert.ToString(values[0].Value) instead of read = Convert.ToString(values[0].Value)
then go up and use that value with my variable :
ascon1.ALM=ReadX("Channel1.Ascon1.AsconS");

Find all the child test suites in TFS using C#

I would like get all the child test suites under a parent test suite in TFS using C# code. Let me know if anyone has done this.

I have create the simple app based on Microsoft.TeamFoundationServer.ExtendedClient
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.TeamFoundation.Client;
using Microsoft.TeamFoundation.TestManagement.Client;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
string teamProjectName = "TFSCMMI";
int parentTestSuiteId = 819; // or test plan id
var TFSCurrentProjectCollection = new TfsTeamProjectCollection(new Uri("http://tfs-srv:8080/tfs/defaultcollection"));
var testStore = TFSCurrentProjectCollection.GetService<ITestManagementService>();
var teamProject = testStore.GetTeamProject(teamProjectName);
var testSuite = teamProject.TestSuites.Find(parentTestSuiteId);
if (testSuite.TestSuiteType == TestSuiteType.StaticTestSuite)
{
var staticSuite = testSuite as IStaticTestSuite;
foreach (var childSuite in staticSuite.Entries)
{
Console.WriteLine("Test suite id " + childSuite.Id + " name '" + childSuite.Title + "'");
}
}
}
}
}

How to integrate Google Bigquery with c# console application

If it is possible to integrate Google big query with C# console application?.
If yes how we can do, i searched over internet i could not find proper answer for that.
I want connection string format? I have created Client ID from Google Developer console how authentication has done? It is one time configuration or every time we need to login in google account to authenticate.
If there is any sample application to connect sample data it would be helpful.
Thanks,
Selvakumar S

Here's a working sample based on another question in StackOverflow:
using DotNetOpenAuth.OAuth2;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Bigquery.v2;
using Google.Apis.Bigquery.v2.Data;
using Google.Apis.Util;
using System;
using System.Diagnostics;
using System.Collections.Generic;
namespace BigQueryConsole
{
public class BigQueryConsole
{
// Put your client ID and secret here (from https://developers.google.com/console)
// Use the installed app flow here.
// Client ID looks like "9999999.apps.googleusercontent.com"
static string clientId = "YOURCLIENTID";
static string clientSecret = "YOURSECRET";
// Project ID is in the URL of your project on the APIs Console
// Project ID looks like "999999";
static string projectId = "YOURPROJECTID";
// Query in SQL-like form
static string query = "SELECT state, count(*) from [publicdata:samples.natality] GROUP BY state ORDER BY state ASC";
public static void Main(string[] args)
{
// Register an authenticator.
var provider = new NativeApplicationClient(GoogleAuthenticationServer.Description);
provider.ClientIdentifier = clientId;
provider.ClientSecret = clientSecret;
// Initiate an OAuth 2.0 flow to get an access token
var auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization);
// Create the service.
var service = new BigqueryService(auth);
JobsResource j = service.Jobs;
QueryRequest qr = new QueryRequest();
qr.Query = query;
QueryResponse response = j.Query(qr, projectId).Fetch();
foreach (TableRow row in response.Rows)
{
List<string> list = new List<string>();
foreach (TableRow.FData field in row.F)
{
list.Add(field.V);
}
Console.WriteLine(String.Join("\t", list));
}
Console.WriteLine("\nPress enter to exit");
Console.ReadLine();
}
private static IAuthorizationState GetAuthorization(NativeApplicationClient arg)
{
// Get the auth URL:
IAuthorizationState state = new AuthorizationState(new[] { BigqueryService.Scopes.Bigquery.GetStringValue() });
state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl);
Uri authUri = arg.RequestUserAuthorization(state);
// Request authorization from the user (by opening a browser window):
Process.Start(authUri.ToString());
Console.Write(" Authorization Code: ");
string authCode = Console.ReadLine();
Console.WriteLine();
// Retrieve the access token by using the authorization code:
return arg.ProcessUserAuthorization(authCode, state);
}
}
}

In your answer i could not able to add namespace
"using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;"
But i manage to retrieve results from BigQuery using below code, you need to update Project Name, Project Id and Query.
Download Client ID (I am using Installed Application - Other category ) generate JSON file and add into your Debug folder.
using Google.Apis.Auth.OAuth2;
using System.IO;
using System.Threading;
using Google.Apis.Bigquery.v2;
using Google.Apis.Bigquery.v2.Data;
using System.Data;
using Google.Apis.Services;
using System;
namespace GoogleBigQuery
{
public class Class1
{
private static void Main()
{
UserCredential credential;
using (var stream = new FileStream("client_secrets.json", FileMode.Open,
FileAccess.Read))
{
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
new[] { BigqueryService.Scope.Bigquery },
"user", CancellationToken.None).Result;
}
// Create and initialize the Bigquery service. Use the Project Name value
// from the New Project window for the ApplicationName variable.
BigqueryService Service = new BigqueryService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "PROJECT NAME"
});
string query = "YOUR QUERY";
JobsResource j = Service.Jobs;
QueryRequest qr = new QueryRequest();
qr.Query = query;
DataTable DT = new DataTable();
int i = 0;
QueryResponse response = j.Query(qr, "PROJECT ID").Execute();
if (response != null)
{
int colCount = response.Schema.Fields.Count;
foreach (var Column in response.Schema.Fields)
{
DT.Columns.Add(Column.Name);
}
foreach (TableRow row in response.Rows)
{
DataRow dr = DT.NewRow();
for (i = 0; i < colCount; i++)
{
dr[i] = row.F[i].V;
}
DT.Rows.Add(dr);
}
}
else
{
Console.WriteLine("Response is null");
}
}
}
}
Thanks.

GooglePlus Authentication in Windows Phone 8.1

I am writing a Windows Phone 8.1 App (WINRT).
How to do GooglePlus Authentication (SignIn via GooglePlus) in Windows Phone 8.1 App** without using MVVM/MVC**?
I used Web Authentication via Webbrowser control in Windows Phone 8.0 App but Windows Phone 8.1 WebView Control does not have Navigating event.
Can anyone help me?
According to Mr. Filip Skakun, I wrote:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.ApplicationModel.Activation;
using Windows.Data.Json;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Security.Authentication.Web;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.Web.Http;
namespace webbrokerFinal
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
Connect();
this.NavigationCacheMode = NavigationCacheMode.Required;
}
string FacebookClientIDString = "000000000000";
string FacebookCallbackUrlString = " https://www.facebook.com/connect/login_success.html";
private void Connect()
{
try
{
String FacebookURL = "https://www.facebook.com/dialog/oauth?client_id=" + FacebookClientIDString + "&redirect_uri=" + Uri.EscapeUriString(FacebookCallbackUrlString) + "&scope=read_stream&display=popup&response_type=token";
System.Uri StartUri = new Uri(FacebookURL);
System.Uri EndUri = new Uri(FacebookCallbackUrlString);
WebAuthenticationBroker.AuthenticateAndContinue(StartUri, EndUri, null, WebAuthenticationOptions.None);
}
catch (Exception Error) >> The remote procedure call failed. (Exception from HRESULT: 0x800706BE)
{
//
// Bad Parameter, SSL/TLS Errors and Network Unavailable errors are to be handled here.
//
}
}
public async void ContinueWebAuthentication(WebAuthenticationBrokerContinuationEventArgs args)
{
WebAuthenticationResult result = args.WebAuthenticationResult;
if (result.ResponseStatus == WebAuthenticationStatus.Success)
{
await GetFacebookUserNameAsync(result.ResponseData.ToString());
}
else if (result.ResponseStatus == WebAuthenticationStatus.ErrorHttp)
{
}
else
{
}
}
private async Task GetFacebookUserNameAsync(string webAuthResultResponseData)
{
//Get Access Token first
string responseData = webAuthResultResponseData.Substring(webAuthResultResponseData.IndexOf("access_token"));
String[] keyValPairs = responseData.Split('&');
string access_token = null;
string expires_in = null;
for (int i = 0; i < keyValPairs.Length; i++)
{
String[] splits = keyValPairs[i].Split('=');
switch (splits[0])
{
case "access_token":
access_token = splits[1]; //you may want to store access_token for further use. Look at Scenario5 (Account Management).
break;
case "expires_in":
expires_in = splits[1];
break;
}
}
//Request User info.
HttpClient httpClient = new HttpClient();
string response = await httpClient.GetStringAsync(new Uri("https://graph.facebook.com/me?access_token=" + access_token));
JsonObject value = JsonValue.Parse(response).GetObject();
string facebookUserName = value.GetNamedString("name");
}
}
}
But giving me error:
The remote procedure call failed. (Exception from HRESULT: 0x800706BE)

I'd start with WebAuthenticationBroker. It's a sort of wrapper around WebView you use for all OAuth.