我在项目中用到的一段代码， 希望能有帮助
unit CloneComponents;
interface
uses
Classes;
function CloneComponent(aSource: TComponent): TComponent;
implementation
uses
SysUtils, Controls;
type
TComponentReader = class(TReader)
public
Component: TComponent;
procedure Read(aComponent: TComponent);
procedure GetName(Reader: TReader
Component: TComponent
var Name: String);
end;
procedure TComponentReader.Read(aComponent: TComponent);
begin
Component := aComponent;
end;
procedure TComponentReader.GetName(Reader: TReader
Component: TComponent
var Name: String);
var
I : Integer;
Tempname: String;
begin
I := 0;
Tempname := Name;
//确保控件Name属性唯一
while Component.Owner.FindComponent(Name) <> nil do
begin
Inc(I);
Name := Format('%s%d', [Tempname, I]);
end;
end;
function CloneComponent(aSource: TComponent): TComponent;
procedure RegisterComponentClasses(aComponent: TComponent);
var
I : Integer;
begin
RegisterClass(TPersistentClass(aComponent.ClassType));
if aComponent is TWinControl then
begin
for I := 0 to (TWinControl(aComponent).ControlCount-1) do
begin
RegisterComponentClasses(TWinControl(aComponent).Controls);
end;
end;
end;
var
Stream : TMemoryStream;
Reader : TComponentReader;
Writer : TWriter;
begin
Stream := TMemoryStream.Create;
try
RegisterComponentClasses(aSource);
Writer := TWriter.Create(Stream, 4096);
try
Writer.Root := aSource.Owner;
Writer.WriteSignature;
Writer.WriteComponent(aSource);
Writer.WriteListEnd;
finally
Writer.Free;
end;
Stream.Position := 0;
Reader := TComponentReader.Create(Stream, 4096);
try
with Reader do
begin
OnSetName := getName
//生成唯一名称
Component := nil;
if aSource is TWinControl then
begin
ReadComponents(TWinControl(aSource).Owner, TWinControl(aSource).Parent, Read);
end
else
begin
ReadComponents(aSource.Owner, nil, Read);
end;
Result := Component;
end;
finally
Reader.Free;
end;
finally
Stream.Free;
end;
end;
end.
