C#

Details: Written by: Stanko Milosev; Category: C#; Published: 21 November 2021; Hits: 67

Here is one my example of in-memory DataTables master - detail relationship.
Create table with code like:

DataTable dtMaster = new DataTable("Master");

In this example I will add Columns without specifying type:

dtMaster.Columns.Add("Id");

Create new row:

DataRow drMaster = dtMaster.NewRow();
drMaster["Id"] = 1;

Add row to DataTable:

dtMaster.Rows.Add(drMaster);

Now details table:

DataTable dtDetail = new DataTable("Details");
dtDetail.Columns.Add("Id");
dtDetail.Columns.Add("FkDetailMasterId");

DataRow drDetail = dtDetail.NewRow();
drDetail["Id"] = 1;
drDetail["FkDetailMasterId"] = 1;
dtDetail.Rows.Add(drDetail);

Create DataSet and add relation:

DataSet ds = new DataSet();

ds.Tables.Add(dtMaster);
ds.Tables.Add(dtDetail);

DataRelation relMasterDetail = new DataRelation("MyRelation"
	, ds.Tables["Master"].Columns["Id"]
	, ds.Tables["Details"].Columns["FkDetailMasterId"]
);

ds.Relations.Add(relMasterDetail);

Example download from here.

Details: Written by: Stanko Milosev; Category: C#; Published: 17 October 2021; Hits: 193

I have added a class library, and introduced one private method. Invoke looks like:

MethodInfoClass mic = new MethodInfoClass();

const BindingFlags bindingFlags = BindingFlags.InvokeMethod |
								  BindingFlags.Public |
								  BindingFlags.NonPublic |
								  BindingFlags.Static |
								  BindingFlags.Instance;

System.Reflection.MethodInfo privateTestMethod = typeof(MethodInfoClass).GetMethod("PrivateTestMethod", bindingFlags);

if (privateTestMethod is not null)
{
	string returnFromPrivateTestMethod = (string)privateTestMethod.Invoke(mic, null);
	Console.WriteLine($"privateTestMethod: {returnFromPrivateTestMethod}");
}

Example project download from here.

Details: Written by: Stanko Milosev; Category: C#; Published: 29 August 2021; Hits: 303

As title said:

using System;
using System.Collections;
using System.Linq;

namespace IEnumarable
{
  class Program
  {
    static void Main(string[] args)
    {
      MyIEnumerable myIEnumerable = new MyIEnumerable();

      foreach (string test in myIEnumerable.Cast<string>().ToList())
      {
        Console.WriteLine(test);
      }
    }

    class MyIEnumerable : IEnumerable
    {
      private string _names = "stanko, milosev, elizabeta, lazarevic";

      public IEnumerator GetEnumerator()
      {
        string[] aryNames = _names.Split();

        foreach (string name in aryNames)
        {
          yield return name;
        }
      }
    }
  }
}

POI:
myIEnumerable.Cast().ToList()

Details: Written by: Stanko Milosev; Category: C#; Published: 29 August 2021; Hits: 296

Small example on how to filter XML per value:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;

namespace ConsoleApp15
{
    class Program
    {
        static void Main(string[] args)
        {
            string strXML = @"
                <doc>
	                <ext>Type:A</ext>
	                <ext>Type:B</ext>
                </doc>";

            XElement myXML = XElement.Parse(strXML);
            IEnumerable<XElement> xElementData = from data in myXML.Descendants("ext") where data.Value.Contains("Type:A") select data;
            foreach (XElement xElement in xElementData)
            {
                Console.WriteLine(xElement.Value);
            }

            Console.ReadKey();
        }
    }
}

POI:
IEnumerable xElementData = from data in myXML.Descendants("ext") where data.Value.Contains("Type:A") select data;

Master - Detail example

Invoke private method with reflection

Example of IEnumerable casting

Filter XML nodes per value

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