Icompare inheritance, compare two spfolder

In the past, I also implemented the inheritance of the icompare interface to compare two objects, but I forgot over time. Now I can see that I want to record it again so that I can review it later!

The followingCodeThis is an excerpt from the book Jian Yi liangjian, which is used to compare spfolder in Sharepoint. The following code implements two comparisons: Name, one is to use another property value (sorting number) for comparison. The Code is as follows.

To better understand this point, we use methods for sort and inherit the icompare class for sorting.

         ///   <Summary>  
  ///  Obtains the list of subfolders sorted by name.
  ///   </Summary>  
  ///   <Param name = "Folders"> </param>  
 ///   <Returns> </returns>  
          Static   Public Ilist <spfolder> getsortedfolders (spfoldercollection folders)
{
List <spfolder> sortedfolders = New List <spfolder> ();

 Foreach (Spfolder F In Folders)
{
 If (F. item! =Null ) //  Non-system folder  
 Sortedfolders. Add (f );
}

Sortedfolders. Sort (comparefolder );

 Return Sortedfolders;
}

 Static   Int Comparefolder (spfolder F1, spfolder F2)
{
 Return F1.name. compareto (f2.name );
}

 ///   <Summary>  
  ///  Obtain the subfolders sorted by a field.
  ///   </Summary>  
  ///   <Param name = "Folders"> </param>  
  ///   <Param name = "sortfieldname"> </param>  
 ///   <Returns> </returns>  
          Static   Public Ilist <spfolder> getsortedfolders (spfoldercollection folders, String Sortfieldname)
{

List <spfolder> sortedfolders = New List <spfolder> ();

 Foreach (Spfolder F In Folders)
{
If (F. item! = Null ) //  Non-system folder  
 Sortedfolders. Add (f );
}

Spfoldercomparer c = New Spfoldercomparer (sortfieldname );

Sortedfolders. Sort (C );

 Return Sortedfolders;
}

 Class Spfoldercomparer: icomparer <spfolder>
{
 Private   String _ Sortfieldname;
 Public Spfoldercomparer ( String Sortfieldname)
{
_ Sortfieldname = sortfieldname;
}

 # Region Icomparer <spfolder> Member

 Public   Int Compare (spfolder X, spfolder y)
{
 //  If (ishiddenfolder (x) | ishiddenfolder (y) return 0;  
 
 If (! X. item. Fields. containsfield (_ sortfieldname) |! Y. item. Fields. containsfield (_ sortfieldname ))
 Return   0 ;

 String SX = "" + X. item [_ sortfieldname];
 If (SX = "" )
SX = "  0  " ;

 String Sy = "" + Y. item [_ sortfieldname];
 If (SY = "" )
Sy = "  0  " ;

 Return Convert. toint32 (SX). compareto (convert. toint32 (SY ));

}

 # Endregion 
}