VC2010 ADO 写入二进制数据到数据库 下载二进制数据到文件

通过ADO把照片以二进制方式写入到数据库保存；

从下载二进制文件到文件

////////////////////数据库相关  头文件里面定义//////////////////////////////

CString m_strConnection; // 数据库连接字符串

CADODatabase m_Db; // 数据库连接

CADORecordset m_Rs; // 数据库记录集

//写入图片到数据库image类型字段

if(!m_Db.Open(m_strConnection)) // 打开数据库

{

MessageBox("打开数据库失败！");

return;

}

m_Rs = CADORecordset(&m_Db);// 创建记录集

//Image_Path从配置文件读入

CFile file;

int fileCount = CountDirectory(Image_Path);//通过传人路径，获取该目录下面的文件个数

for (int i=1;i<fileCount;i++)

{

CString filename;

filename.Format("image\\image%d.jpg",i);

if(!file.Open(filename,CFile::modeRead | CFile::typeBinary))

return;

int dwLo=file.GetLength();

BYTE *m_pImagBuffer=new BYTE[dwLo];

ZeroMemory(m_pImagBuffer,dwLo);

file.Read(m_pImagBuffer,dwLo);

file.Close();

// BOOL m_b = file.Open("1.dat",CFile::modeWrite | CFile::modeCreate |CFile::typeBinary);

// file.Write(m_pImagBuffer,dwLo);

// file.Close();

strQuery.Format("Select * From ImageTest");

m_Rs.Open(strQuery,CADORecordset::cadoOpenEnum::openQuery);

m_Rs.AddNew();

CString strTime;

SYSTEMTIME systm;

GetLocalTime(&systm);

strTime.Format("%4d-%02d-%02d %02d:%02d:%02d",\

systm.wYear, systm.wMonth, systm.wDay,\

systm.wHour, systm.wMinute, systm.wSecond);

m_Rs.SetFieldValue("Date",strTime);

m_Rs.AppendChunk("ImageData",m_pImagBuffer,dwLo);

m_Rs.Update();

m_Rs.Close();

delete []m_pImagBuffer;

}

m_Db.Close();

//读取数据库二进制文件保存到本地

int index=0;    //记录个数

if(!m_Db.Open(m_strConnection)) // 打开数据库

{

MessageBox("打开数据库失败！");

return;

}

m_Rs = CADORecordset(&m_Db);// 创建记录集

CString strFilePath;

//strFilePath = Image_Path + "\\BMP";

strFilePath = "OUT_BMP";

::CreateDirectory(strFilePath,NULL);   //创建目录

// CString strNameCount;

// int nRowCount;

// strNameCount.Format("SELECT COUNT(ImageData) FROM ImageTest");

//

// if (m_Rs.Open(strNameCount,CADORecordset::cadoOpenEnum::openQuery))

// m_Rs.GetFieldValue(0,nRowCount);   //获取记录个数

// m_Rs.Close();

strQuery.Format("Select ImageData From ImageTest");

if(m_Rs.Open(strQuery,CADORecordset::cadoOpenEnum::openQuery))

{

while(!(m_Rs.IsEOF()))

{

CString filename;

filename.Format("%s\\image%d.png",strFilePath,index);

m_ImgNameMap[index]=filename;    //把输出的所有名字放到容器里面

CADOFieldInfo fldInfo;

m_Rs.GetFieldInfo("ImageData",&fldInfo);

BYTE *m_pImagBuffer = new BYTE[fldInfo.m_lSize];

m_Rs.GetChunk("ImageData",m_pImagBuffer);

CFile outFile(filename,CFile::modeCreate | CFile::modeWrite);

outFile.Write(m_pImagBuffer,fldInfo.m_lSize);

outFile.Close();

m_Rs.MoveNext();

index++;

delete []m_pImagBuffer;

}

m_Rs.Close();

}

m_Db.Close();

软件实例截图：

软件实例下载地址：

http://download.csdn.net/detail/suifeng1984114/7835095

软件截图