您可以从 TPersistent 继承,然后可以使用 TJvAppXMLFileStorage ( JVCL ) 组件来序列化 TAlarm 类。
保存对象
uses
JvAppXMLStorage;
Procedure SaveMyObject(MyAlarm : TAlarm)
var
MyStore: TJvAppXMLFileStorage;
begin
MyStore:= TJvAppXMLFileStorage.Create(nil);
try
MyStore.WritePersistent('', MyAlarm);
MyStore.Xml.SaveToFile('C:\MyAlarm.xml');
finally
MyStore.Free;
end;
end;
恢复对象
uses
JvAppXMLStorage;
Procedure LoadMyObject(MyAlarm : TAlarm)
var
MyStore: TJvAppXMLFileStorage;
begin
MyStore:= TJvAppXMLFileStorage.Create(nil);
try
MyStore.FileName:='C:\MyAlarm.xml';
MyStore.Xml.LoadFromFile('C:\MyAlarm.xml');
MyStore.ReadPersistent('', MyAlarm);
finally
MyStore.Free;
end;
end;
更新
如果您需要将多个对象持久保存到 XML 文件,则必须为 WritePersistent 和 ReadPersistent 方法分配一个路径(唯一 ID)。
看这个例子,
多次坚持
Procedure SaveMyObjects(MyObjects : Array of TComponent);
var
MyStore: TJvAppXMLFileStorage;
i : integer;
begin
MyStore:= TJvAppXMLFileStorage.Create(nil);
try
for i := Low(MyObjects) to High(MyObjects) do
MyStore.WritePersistent(MyObjects[i].Name, MyObjects[i]); //In this case i use the name property of the component.
MyStore.Xml.SaveToFile('C:\Tools\MyAlarm.xml');
finally
MyStore.Free;
end;
end;
保存组件
SaveMyObjects([Button1,Button2,Edit1,Edit2]);
多重负载
Procedure LoadMyObjects(MyObjects:Array of TComponent);
var
MyStore : TJvAppXMLFileStorage;
i : integer;
begin
MyStore:= TJvAppXMLFileStorage.Create(nil);
try
MyStore.FileName:='C:\Tools\MyAlarm.xml';
MyStore.Xml.LoadFromFile('C:\Tools\MyAlarm.xml');
for i := Low(MyObjects) to High(MyObjects) do
MyStore.ReadPersistent(MyObjects[i].Name, MyObjects[i]);
finally
MyStore.Free;
end;
end;
恢复属性
LoadMyObjects([Button1,Button2,Edit1,Edit2]);
另一个加载选项
Procedure LoadMyObjectById(Id:String;MyObject:TComponent); //using the id of the object
var
MyStore : TJvAppXMLFileStorage;
i : integer;
begin
MyStore:= TJvAppXMLFileStorage.Create(nil);
try
MyStore.FileName:='C:\Tools\MyAlarm.xml';
MyStore.Xml.LoadFromFile('C:\Tools\MyAlarm.xml');
MyStore.ReadPersistent(id, MyObject);
finally
MyStore.Free;
end;
end;
你必须以这种方式运行它
LoadMyObjectById(Button1.Name,Button1); //Again using the Name property.
我希望这个例子会有用;)