Delphi基础Write写入结构体到文件（使用 file of myrecord就行了，真简单）

program WriteStruct;

{$APPTYPE CONSOLE}

uses
  SysUtils;

//写入结构体

type
  TCustomer = record
    ID:   string[];
    Code: string[];
    Name: string[];
  end;

var
  Customers: array[..] of TCustomer;
  i: Integer;
  myText: file of TCustomer;  //file of type type必须是固定大小的，不能是对象, String, Variant等
  customer: TCustomer;
begin
  try
    AssignFile(myText, 'D:\customer.cus');
    //重写文件
    Rewrite(myText);
    for i :=  to   do begin
      Customers[i].ID := 'Test:' + IntToStr(i);
      Customers[i].Code := 'Buy:' + IntToStr(i);
      Customers[i].Name := 'monty' + IntToStr(i);
      Write(myText, Customers[i]);
    end;

    CloseFile(myText);

    for i :=  to   do begin
      Customers[i].ID := '';
      Customers[i].Code := '';
      Customers[i].Name := '';
    end;

    //只读模式打开文件
    Reset(myText);
    //读取文件是否结束
    while not Eof(myText) do begin
      read(myText, customer);
      //输出
      Writeln(Customer.ID, customer.Name, customer.Code);
    end;

    CloseFile(myText);
    Readln;

  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
end.

http://www.cnblogs.com/pengshaomin/archive/2012/09/28/2707413.html