public static IQueryable<T> ApplyFiltering<T>(
          this IQueryable<T> query,
          IPagedQueryModel model,
          IDictionary<string, Expression<Func<T, object>>> columnsMap)
        {
            if (string.IsNullOrWhiteSpace(model.FilterByValue) || !columnsMap.ContainsKey(model.FilterByColumn))
            {
                return query;
            }

            var predicate = string.Format("{0} {1} @{2}", model.FilterByColumn, "==", 0);
            return query.Where(predicate, model.FilterByValue);
        }

  <ItemGroup>
    <PackageReference Include="System.Linq.Dynamic.Core" Version="1.1.2" />
  </ItemGroup>

    public async Task ExampleAsync()
    {
        await doSomethingAsync<string>(() => Task.FromResult("...."));
        await doSomethingAsync(() => Task.Delay(1000));
    }

public static IQueryable<T> ApplyFiltering<T>(
          this IQueryable<T> query,
          IPagedQueryModel model,
          IDictionary<string, Expression<Func<T, object>>> columnsMap)
        {
            if (string.IsNullOrWhiteSpace(model.FilterByValue) || !columnsMap.ContainsKey(model.FilterByColumn))
            {
                return query;
            }

            var func = columnsMap[model.FilterByColumn].Compile();
            return query.Where(x => func(x).ToString().Contains( model.FilterByValue.Trim()));
        }

System.Guid.NewGuid().ToString() = 81276701-9dd7-42e9-b128-81c762a172ff
System.Guid.NewGuid().ToString("N") = 489ecfc61ee7403988efe8546806c6a2
System.Guid.NewGuid().ToString("D") = 119201d9-84d9-4126-b93f-be6576eedbfd
System.Guid.NewGuid().ToString("B") = {fd508d4b-cbaf-4f1c-894c-810169b1d20c}
System.Guid.NewGuid().ToString("P") = (eee1fe00-7e63-4632-a290-516bfc457f42)

using System;
using System.Text.RegularExpressions;

namespace sample
{
  /// <summary>
  /// بررسی اعتبار یک گوئید
  /// </summary>
  public static class CValidGUID
  {
      /// <summary>
      /// بررسی تعیین اعتبار ورودی
      /// </summary>
      /// <param name="guidString">ورودی</param>
      /// <returns></returns>
      public static bool IsGuid(this string guidString)
      {
          if (string.IsNullOrEmpty(guidString)) return false;

          bool bResult;
          try
          {
              Guid g = new Guid(guidString);
              bResult = true;
          }
          catch
          {
              bResult = false;
          }

          return bResult;
      }

      /// <summary>
      /// بررسی تعیین اعتبار ورودی
      /// </summary>
      /// <param name="input">ورودی</param>
      /// <returns></returns>
      public static bool IsValidGUID(this string input)
      {
          return !string.IsNullOrEmpty(input) &&
              new Regex(@"^(\{{0,1}([0-9a-fA-F]){8}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){12}\}{0,1})$").IsMatch(input);
      }
  }

}

using NUnit.Framework;
using sample;

namespace TestLibrary
{
  [TestFixture]
  public class TestCValidGUID
  {

      /*******************************************************************************/
      [Test]
      public void TestIsGuid1()
      {
          Assert.IsTrue("81276701-9dd7-42e9-b128-81c762a172ff".IsGuid());
      }

      [Test]
      public void TestIsGuid2()
      {
          Assert.IsTrue("489ecfc61ee7403988efe8546806c6a2".IsGuid());
      }

      [Test]
      public void TestIsGuid3()
      {
          Assert.IsTrue("{fd508d4b-cbaf-4f1c-894c-810169b1d20c}".IsGuid());
      }

      [Test]
      public void TestIsGuid4()
      {
          Assert.IsTrue("(eee1fe00-7e63-4632-a290-516bfc457f42)".IsGuid());
      }

      [Test]
      public void TestIsGuid5()
      {
          Assert.IsFalse("81276701;9dd7;42e9-b128-81c762a172ff".IsGuid());
      }


      /*******************************************************************************/
      [Test]
      public void TestIsValidGUID1()
      {
          Assert.IsTrue("81276701-9dd7-42e9-b128-81c762a172ff".IsValidGUID());
      }

      [Test]
      public void TestIsValidGUID2()
      {
          Assert.IsTrue("489ecfc61ee7403988efe8546806c6a2".IsValidGUID());
      }

      [Test]
      public void TestIsValidGUID3()
      {
          Assert.IsTrue("{fd508d4b-cbaf-4f1c-894c-810169b1d20c}".IsValidGUID());
      }

      [Test]
      public void TestIsValidGUID4()
      {
          Assert.IsTrue("(eee1fe00-7e63-4632-a290-516bfc457f42)".IsValidGUID());
      }

      [Test]
      public void TestIsValidGUID5()
      {
          Assert.IsFalse("81276701;9dd7;42e9-b128-81c762a172ff".IsValidGUID());
      }
  }

}

<html>
   <head>
       <script type="text/javascript" src="jquery-1.9.1.min.js"></script>
   </head>
   <body>
   </body>
</html>

var checkedValue;
var elements = document.getElementByTagName ('input');
for (var n = 0; n < elements.length; n++) {
       if (elements[n].type == 'radio' && elements[n].name == 'myRadioGroup' && elements[n].checked) {
               checkedValue = elements[n].value;
       }
}

var checkedValue = $ ('[name="myRadioGroup"]:checked').val();

<button type="button" onclick="document.getElementById('xyz').style.color='red';">
        Click Me
</button>

p a

$(Selector)
یا
jQuery(Selector)

$("p a")

$("div.notLongForThisWorld").fadeOut();

$("div.notLongForThisWorld").fadeOut().addClass("removed");