[Code Snippet] : Connect to Sql Server from ArcObject

 using System;

using ESRI.ArcGIS.DataSourcesFile;

using ESRI.ArcGIS.esriSystem;

using ESRI.ArcGIS.Geodatabase;

namespace MyNamespace

{

  class MyProgram

  {

    private static LicenseInitializer _licenseInitializer = new LicenseInitializer();

    [STAThread()]

    static void Main(string[] args)

    {

      _licenseInitializer.InitializeApplication(new esriLicenseProductCode[] { esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB },

                                                   new esriLicenseExtensionCode[] { });

      Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.SqlWorkspaceFactory");

      IPropertySet propertySet = new PropertySetClass();

      propertySet.SetProperty("SERVER", "servername");

      propertySet.SetProperty("INSTANCE", "sde:sqlserver:servername");

      propertySet.SetProperty("AUTHENTICATION_MODE", "DBMS");

    // propertySet.SetProperty("AUTHENTICATION_MODE", "OSA");

      propertySet.SetProperty("DATABASE", "test1");

      propertySet.SetProperty("USER", "username");

      propertySet.SetProperty("PASSWORD", "password");

      propertySet.SetProperty("VERSION", "sde.DEFAULT");

      IWorkspaceFactory workspaceFactory = new SDCWorkspaceFactory();

      IWorkspace workspace = workspaceFactory.Open(propertySet, 0);

    }

  }

}

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[Code Snippet] Assert.Throws on Exception and Derived Type Nunit

 Code snippet for asserting throw in ArgumentException and its derived types(such as ArgumentNullException) in Nunit - 

public void Test(){

Assert.Throws(Is.InstanceOf<ArgumentException>(), () =>{

    //SUT code

});

}

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[Code snippet] How to set value of private variable in Unit Test Using Reflection ?

A sample example to set private variable to true from unit test class in C#.Net

//TestService.cs
public class TestService
{
        private bool _isInitialized = false;
}



//TestServiceUnitTest.cs
using System.Reflection;

public class TestServiceUnitTest
{
          private TestService _testService;
       
           [TestInitalize]
          private void testInitalize()
         {
            _testService = new TestService();
         }
       
         [TestMethod]
         Private void SetInitializeToTrue()
         {
                         FieldInfo field = typeof(TestService).GetField("_isInitialized",  BindingFlags.NonPublic |       BindingFlags.Instance);

          field.SetValue(_testService , true);

         }

}

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[Code Snippet] Assert Exception in private methods using PrivateObject

NON ASYNC Method

Method.cs

private MyMethod(object value1)
{
      if(value1 == null)
      {
           throw new ArgumentNullException(nameof(MyMethod));
      }
}

Test.Cs

[TestMethod]
public void MyMethod_Throws_Verify()
{
         PrivateObject po = new PrivateObject(new Method())

TargetInvocationException exception = Assert.ThrowsException<TargetInvocationException>(() =>
                    privateObject.Invoke("MyMethod", new object[] { null }));

            Assert.AreEqual(typeof(ArgumentNullException), exception.InnerException.GetType());
       
}

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[Code Snippet] Example of using Delegate, Func and Action side by side in C#

Quick and dirty example of using Delegate, Func and Action
side by side in C# to show how to use function pointer  or callback in C#


Example #1  Delegate and Func side by side

     static int DoubleTheValue(int x)
        {
            return x * 2;
        }

        // delegate type should match the function signature  - DoubleTheValue
        public delegate int functionDelegateType(int x);
     
        static void Method1(functionDelegateType func)
        {
            int doubleValue = func(5);
        }


        static void Method2(Func<int, int> func) // easier syntax
        {
            int doubleValue = func(5);
        }

        static void Main(string[] args)
        {
            Method1(DoubleTheValue);

            Method2(DoubleTheValue);
        }

Example #2  Delegate and Action side by side

static void DisplayOnConsole(int x)
        {
            Console.WriteLine(x.ToString());
        }

        // delegate type should match the function signature  - DisplayOnConsole
        public delegate void functionDelegateType (int x);
        static void Method1(functionDelegateType func)
        {
            func(5);
        }

     
        static void Method2(Action<int> func) // easier syntax
        {
            func(5);
        }

     
        static void Main(string[] args)
        {
            Method1(DisplayOnConsole);
            Method2(DisplayOnConsole);
        }

Reference:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/a1ac99ed-0801-4773-a866-4223d42422cf/how-to-pass-function-as-an-argument-to-another-function-in-c?forum=csharpgeneral

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[Code snippet] INotifyPropertyChanged in the model and subscribed the PropertyChanged event of the model in ViewModel

internal class Model:INotifyPropertyChanged
    {
        public Model()
        {
        }

        string _FirstName = "Shahir";
        public string FirstName
        {
            get { return _FirstName; }
            set
            {
                _FirstName = value;
                OnPropertyChanged();
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged([CallerMemberName] string propertyName = "")
        {
            if(PropertyChanged!=null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

internal class MyViewModel:INotifyPropertyChanged
    {
        private Model myModel;

        public MyViewModel(Model model)
        {
            this.myModel = model;
            myModel.PropertyChanged += myModel_PropertyChanged;
        }


        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged([CallerMemberName] string propertyName = "")
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }


        string _FirstName;
        public string MyFirstName
        {
            get { return myModel.FirstName; }
            set
            {
                _FirstName = value;
                OnPropertyChanged();
            }
        }

        private void myModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "FirstName")
            {
                MyFirstName = myModel.FirstName;
            }
        }
    }

REFERECE - https://www.codeproject.com/Questions/1055820/How-the-Model-changes-could-be-notified-to-ViewMod

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Code snippet: ArcGIS Runtime 100.x Geodatabase Delta Sync

ESRI namespaces

using Esri.ArcGISRuntime.Tasks.Offline;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Tasks;
using Esri.ArcGISRuntime.Http;



Code snippet

string localGeodatabaseName = @"C:\Data\test.geodatabase";

string deltaGeodatabaseName = @"C:\Deltas\_ags_data{52DwertD40459D02EC197E5EC12C}.geodatabase";

Task<IReadOnlyList<SyncLayerResult>> syncTaskResult = GeodatabaseSyncTask.ImportGeodatabaseDeltaAsync(localGeodatabaseName , deltaGeodatabaseName );

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Code snippet: HTTP call to ArcGIS server from ArcGIS Runtime Enviroment 100.x

Required namespaces - 

using System.Net.Http;
using Esri.ArcGISRuntime.Http;

using Newtonsoft.Json; //To parse the response

Code snippet - 

Uri requestUri = new Uri(serviceUrl +"?f=pjson");

//Default HttpClient handler which also handles the ArcGIS server Identity

ArcGISHttpClientHandler handler = new ArcGISHttpClientHandler() 

                                                                  { UseDefaultCredentials = true };

HttpClient client = new HttpClient(handler);

string serverResponseJsonString = await client.GetStringAsync(requestUri);

Console.WriteLine(serverResponseJsonString );  

              

//Convert respones string to JSON Object, optional

ArcGisServerResponse  serverResponseJson = JsonConvert.DeserializeObject<ArcGisServerResponse>(serverResponseJsonString);

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Flavours of .NET implementation

	OS	Open Source	Purpose
.NET Framework	Windows	No	Used for building Windows desktop applications and ASP.NET Web apps running on IIS.
.NET Core	Windows, Linux, macOS	Yes	Used for building cross-platform console apps and ASP.NET Core Web apps and cloud services.
Xamarin	iOS, Android, macOS	Yes	Used for building mobile applications for iOS and Android, as well as desktop apps for macOS.
.NET Standard	N/A	Yes	Used for building libraries that can be referenced from all .NET implementations, such as .NET Framework, .NET Core and Xamarin.

Ref - https://msdn.microsoft.com/en-us/magazine/mt842506.aspx

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Code Snippet: ESRI JS API 4.11 get Latittude Longitude on mouse hover

ESRI JS API 4.11 get Latittude Longitude on mouse hover


//print point on mouse hover on map

mapView.on("pointer-move", function(event){

let mapPoint = mapView.toMap({x: event.x, y: event.y});

console.log(mapPoint);

});

//print point on mouse click on map

mapView.on("click", function(event){

let mapPoint = event.mapPoint;

console.log(mapPoint)

});

Both console statement will return the identical object as below which has latitude and longitude

1. {__accessor__: b}
1. cache: (...)
2. extent: (...)
3. hasM: (...)
4. hasZ: (...)
5. latitude: (...)
6. longitude: (...)
7. m: (...)
8. spatialReference: (...)
9. type: (...)
10. x: (...)
11. y: (...)
12. z: (...)
13. constructed: (...)
14. destroyed: (...)
15. initialized: (...)
16. __accessor__: b {host: {…}, _origin: 6, cursors: {…}, ctorArgs: null, destroyed: false, …}
17. __proto__: Object

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