你的代碼不使用流閱讀,這是完全不可能的問題是與讀取文件。以下是使用TFileStream
來成功讀取和寫入記錄而不以任何方式更改值的示例。 (顯然,你必須改變TestFile
不斷指向一個有效的,可寫位置您的系統上第一。)
program Project1;
{$APPTYPE CONSOLE}
uses
SysUtils, Classes;
type
TMyHeader = packed record
Value1: String[20];
Value2: Word;
Value3: Word;
Value4: Word;
end;
var
MyHeader: TMyHeader;
Stream: TFileStream;
const
TestFile = 'E:\TempFiles\Testheader.bin';
begin
// Initialize the record
MyHeader.Value1 := 'Testing One Two';
MyHeader.Value2 := 43140;
MyHeader.Value3 := 12345;
MyHeader.Value4 := 43140;
// Show what it contains. The `[]` brackets are to clearly delimit Value1
WriteLn(Format('Before write: [%s] %d %d %d',
[MyHeader.Value1, MyHeader.Value2, MyHeader.Value3, MyHeader.Value4]));
// Write it to the stream.
Stream := TFileStream.Create(TestFile, fmCreate, fmShareDenyNone);
try
Stream.Write(MyHeader, SizeOf(TMyHeader));
finally
Stream.Free;
end;
// Clear the contents of MyHeader before reading back, and show the empty values
FillChar(MyHeader, SizeOf(TMyHeader), 0);
WriteLn(Format('Before read: [%s] %d %d %d',
[MyHeader.Value1, MyHeader.Value2, MyHeader.Value3, MyHeader.Value4]));
Stream := TFileStream.Create(TestFile, fmOpenRead, fmShareDenyNone);
try
Stream.Read(MyHeader, SizeOf(TMyHeader));
finally
Stream.Free;
end;
// Output what we've read back in to verify it is correct
WriteLn(Format('After read: [%s] %d %d %d',
[MyHeader.Value1, MyHeader.Value2, MyHeader.Value3, MyHeader.Value4]));
Readln;
end.
可能的話,你必須在源文件中UTF-16字符。而不是ANSI。 – kami
顯示問題的[mcve]會有幫助。猜測可能是錯誤的是不可能的。您的代碼也不會使用Stream閱讀器。你真的問什麼問題? –
讓我一起敲一個,我用SysUtils的Stream reader和FileRead都給出了相同的結果。 – kyndigs