| Description |
Removes selected leading characters from the current string.
It starts at the beginning of the string and keeps removing characters when they match one of the CharArray characters. It continues through the string removing characters until it encounters a character not in the array.
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| | Notes | Like a lot of string methods, the string object itself is not affected - the modified string is returned for assignment.
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| Microsoft MSDN Links |
system
system.String
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| A simple example |
// 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}
var
strA, strB : String;
charArray : Array[0..1] of Char;
begin
strA := ' --- Hello -- ';
charArray[0] := ' ';
charArray[1] := '-';
Console.WriteLine('strA = ''' + strA + '''');
strB := strA.TrimStart(charArray);
Console.WriteLine('Trimming '' '' and ''-'' chars from the start only');
Console.WriteLine('strB = ''' + strB + '''');
Console.ReadLine;
end.
end. | | Hide full unit code | strA = ' --- Hello -- '
Trimming ' ' and '-' chars from the start only
strB = 'Hello' -- '
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