C++builder 保存字符串
这是我写的两个保存和打开字符串的代码

，还望高手给解决一下，谢谢                                                  C++Builder                    String                                              
[解决办法]
//从流中读取字符串
void OpenStringFromStream(TMemoryStream* stream,String& str)
{
 
    int length ;
        stream->LoadFromFile("C:\\Users\\Administrator\\Desktop\\123.tcs");
    stream->Read(&length,sizeof(length));
    char * strs = new char[length+1];
    stream->Read(strs,length);
    strs[length] = '\0';
    str = String(strs);
        ShowMessage(str);
    delete[] strs;
 
}

[解决办法]
没用过XE4,用过的最后一个版本就是6

如果XE4中String是Unicode的，那么这样试试：


void SaveStringToStream(TMemoryStream* stream, String str)
{
 
    int length = 2*str.Length(); 
 
    stream->Write(&length,sizeof(length));
    stream->Write(str.c_str(),length);
    stream->SaveToFile("C:\\Users\\Administrator\\Desktop\\123.tcs");
 
}

//从流中读取字符串
void OpenStringFromStream(TMemoryStream* stream,String& str)
{
 
    int length ;
    stream->LoadFromFile("C:\\Users\\Administrator\\Desktop\\123.tcs");
    stream->Read(&length,sizeof(length));
    length /= 2;//加上这一句
    WideChar* strs = new WideChar[length+1];
    stream->Read(strs,length);
    strs[length] = L'\0';//加上这一句
    str = String(strs);
    ShowMessage(str);
    delete[] strs;
}

[解决办法]
void SaveStringToStream(TMemoryStream *stream, String str)
{
int length = 2 * str.Length();
stream->Write(&length, sizeof(length));
stream->Write(str.c_str(), length);

stream->SaveToFile("E:\\Temp\\123.tcs");
}

void OpenStringFromStream(TMemoryStream *stream, String &str)
{
stream->LoadFromFile("E:\\Temp\\123.tcs");
stream->Position = 0;

int length;
stream->Read(&length, sizeof(length));

WideChar *strs = new WideChar[length / 2 + 1];
stream->Read(strs, length);
strs[length / 2] = 0x0;

str = String(strs);
ShowMessage(str);

delete []strs;
}

void __fastcall TForm1::Button1Click(TObject *Sender)
{
TMemoryStream *ms = new TMemoryStream;

String src = L"不要把简单的问题复杂化，hahaha!";
SaveStringToStream(ms, src);

String dst;
OpenStringFromStream(ms, dst);

delete ms;
}