请问怎样将Record类型数据写入、读取type
Tmyla=record
name:string[10];
value1:string[5];
value2:integer;
end;
var
lalist:array of Tmylaprocedure TForm1.Button1Click(Sender: TObject);
var
i: integer;
begin
setlength(lalist,5); //大小可自由设定
for i:=0 to 4 do
begin
lalist[i].name:=edit1.text+'_'+inttostr(i);;
lalist[i].value1:=edit2.text;
lalist[i].value2:=inttostr(i);
end;
end;
如何将动态数组lalist保存至文件,打开时再从文件中读到lalist?
Tmyla=record
name:string[10];
value1:string[5];
value2:integer;
end;
var
lalist:array of Tmylaprocedure TForm1.Button1Click(Sender: TObject);
var
i: integer;
begin
setlength(lalist,5); //大小可自由设定
for i:=0 to 4 do
begin
lalist[i].name:=edit1.text+'_'+inttostr(i);;
lalist[i].value1:=edit2.text;
lalist[i].value2:=inttostr(i);
end;
end;
如何将动态数组lalist保存至文件,打开时再从文件中读到lalist?
type
Tmyla=record
name:string[10];
value1:string[5];
value2:integer;
end;
TmylaArray=array of Tmyla;
TmylaFile=file of TmylaArray;之后用read,write来对文件进行读写操作。参看一些pascal操作文件的例子。也可以用Delphi的TStringList来操作,安自己的格式写成文本文件
Tmyla=record
name:string[10];
value1:string[5];
value2:integer;
end;
type TmylaFile=file of Tmyla;var
Form1: TForm1;
lalist:array of Tmyla;
n:integer=3;
FileName:string='c:\test';
implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);//写
var f:TmylaFile;
i:integer;
begin
SetLength(LaList,n);
for i:=0 to n-1 do
begin
lalist[i].name:='edit1.text'+'_'+inttostr(i);
lalist[i].value1:='edit';
lalist[i].value2:=i;
end; System.Assign(f,FileName);
Rewrite(f);
for i:=0 to n-1 do write(f,LaList[i]);
System.Close(f);
end;procedure TForm1.Button2Click(Sender: TObject);//读
var f: TmylaFile;
i:integer;
begin
SetLength(LaList,n);
System.Assign(f,FileName);
Reset(f);
for i:=0 to n-1 do
begin
read(f,LaList[i]);
ShowMessage(Format('%s %s %d',[LaList[i].name,LaList[i].value1,LaList[i].value2]));
end;
System.Close(f);
end;