| Description |
The Compare method performs a case-insensitive comparison of ValueA with ValueB, returning a number that describes the relation of the values of these two objects.
The Compare method is often called by other .Net classes, such as Sort, as in the example.
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| Microsoft MSDN Links |
System.Collections
System.Collections.CaseInsensitiveComparer
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| A hidden use of Compare by ArrayList.Sort |
// Full Unit code.
// -------------------------------------------------------------
// Create a new WinForm application, double click the form to
// create an OnLoad event, and then replace the WinForm unit
// with this text.
unit WinForm;
interface
uses
System.Drawing, System.Collections, System.ComponentModel,
System.Windows.Forms, System.Data;
type
TWinForm = class(System.Windows.Forms.Form)
\{REGION 'Designer Managed Code'\} // Note that REGION and ENREGION should be prefixed by a dollar sign
strict private
///
/// Required designer variable.
///
Components: System.ComponentModel.Container;
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
procedure InitializeComponent;
procedure TWinForm_Load(sender: System.Object; e: System.EventArgs);
{ENDREGION}
strict protected
///
/// Clean up any resources being used.
///
procedure Dispose(Disposing: Boolean); override;
private
{ Private Declarations }
public
constructor Create;
end;
[assembly: RuntimeRequiredAttribute(TypeOf(TWinForm))]
implementation
\{REGION 'Windows Form Designer generated code'\}
///
/// Required method for Designer support -- do not modify
/// the contents of this method with the code editor.
///
procedure TWinForm.InitializeComponent;
begin
//
// TWinForm
//
Self.AutoScaleBaseSize := System.Drawing.Size.Create(5, 13);
Self.ClientSize := System.Drawing.Size.Create(292, 266);
Self.Name := 'TWinForm';
Self.Text := 'WinForm';
Include(Self.Load, Self.TWinForm_Load);
end;
{ENDREGION}
procedure TWinForm.Dispose(Disposing: Boolean);
begin
if Disposing then
begin
if Components <> nil then
Components.Dispose();
end;
inherited Dispose(Disposing);
end;
constructor TWinForm.Create;
begin
inherited Create;
//
// Required for Windows Form Designer support
//
InitializeComponent;
//
// TODO: Add any constructor code after InitializeComponent call
//
end;
procedure TWinForm.TWinForm_Load(sender: System.Object; e: System.EventArgs);
program Project1;
{$APPTYPE CONSOLE}
uses
System.Globalization,
System.Collections;
var
List : System.Collections.ArrayList;
Comparer : System.Collections.CaseInsensitiveComparer;
Culture : System.Globalization.CultureInfo;
i : Integer;
begin
// Create our array list object
List := ArrayList.Create;
// Fill it
List.Add('DEF');
List.Add('abc');
List.Add('ABC');
// Display List contents : note the 0 indexing
for i := 0 to List.Count-1 do
Console.WriteLine(List.Item[i].ToString);
// Use British English for comparison
Culture := System.Globalization.CultureInfo.Create('en-GB');
// Create our comparer object
Comparer := System.Collections.CaseInsensitiveComparer.Create(Culture);
// Sort the array into sequence
Console.WriteLine;
Console.WriteLine('Sorting the array into sequence :');
Console.WriteLine;
// The following uses the Compare method
List.Sort(Comparer);
// Display List contents again
for i := 0 to List.Count-1 do
Console.WriteLine(List.Item[i].ToString);
Console.Readline;
end.
end. | | Hide full unit code | DEF
abc
ABC
Sorting the array into sequence :
ABC
abc
DEF
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