如何完全读取图像数据并将其保存在数据库中? [英] How to read the image data fully and saving it in database?

问题描述

我正在使用以下代码读取图像数据.它的长度是3922126.但是看完之后. b_FileData仅存储三个字节.如何完全读取图像(位图)并将其保存为字节以将其存储在数据库中.

I am using the below code to read the image data. It is of 3922126 length. But after reading it. b_FileData stores only three bytes. How to read the image(bitmap) fully and save it in bytes in order to store it in the database.

     LPBYTE b_FileData = NULL; //File data container
    CFile m_file;
    DWORD l_Filelen;
    m_file.Open(lpszName,CFile::modeRead | CFile::modeNoTruncate);
    m_file.SeekToBegin();

l_Filelen = m_file.GetLength();
b_FileData = new BYTE[l_Filelen];
m_file.Read(b_FileData,l_Filelen);
m_file.Close();//Close the file

推荐答案

我不确定是否将数据存储在数据库中.但是您发布的代码应该可以使用.另外，您如何知道b_FileData具有3个字节的信息.检查
的返回值 m_file.Read(b_FileData,l_Filelen);.如果它等于l_Filelen，则代码正在读取完整文件.

I am not sure about storing the data in database.But code you posted should work.Also, how you know that b_FileData is having 3 bytes of information.Check the return value of
m_file.Read(b_FileData,l_Filelen);.If it is equal to l_Filelen then the code is reading full file.

我认为您在Open调用中缺少CFile::typeBinary

i think you''re missing CFile::typeBinary in your Open call

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