CompareNull

/ Assembly List / LJCNetCommon / NetCommon / CompareNull

Namespace - LJCNetCommon

Parameters

x - The compare object.

y - The compare to object.

Returns

The integer that indicates the order relationship of the objects.

Syntax

C#
public static Int32 CompareNull(Object x, Object y)

Compare null values. (DE)

Remarks

-2 - Neither object is null.
-1 - Null object x precedes object y.
0 - Object x and object y are both null.
1 - Object x follows null object y.

Example

C#
using System; using LJCNetCommon; /// <summary>Sort and search on Name value.</summary> public class NameComparer : IComparer<ClassName> { // Compares two objects. /// <include path='items/Compare/*' file='../../../CoreUtilities/LJCDocLib/Common/Data.xml'/> public int Compare(ClassName x, ClassName y) { int retValue; retValue = NetCommon.CompareNull(x, y); if (-2 == retValue) { retValue = NetCommon.CompareNull(x.Name, y.Name); if (-2 == retValue) { // Case sensitive. //retValue = x.Name.CompareTo(y.Name); // Not case sensitive. retValue = string.Compare(x.Name, y.Name, true); } } return retValue; } }

using System;
using LJCNetCommon;
        
/// <summary>Sort and search on Name value.</summary>
public class NameComparer : IComparer<ClassName>
{
  // Compares two objects.
  /// <include path='items/Compare/*' file='../../../CoreUtilities/LJCDocLib/Common/Data.xml'/>
  public int Compare(ClassName x, ClassName y)
  {
    int retValue;

    retValue = NetCommon.CompareNull(x, y);
    if (-2 == retValue)
    {
      retValue = NetCommon.CompareNull(x.Name, y.Name);
      if (-2 == retValue)
      {
        // Case sensitive.
        //retValue = x.Name.CompareTo(y.Name);

        // Not case sensitive.
        retValue = string.Compare(x.Name, y.Name, true);
      }
    }
    return retValue;
  }
}