Add photos to the database and add photos to the database

Add photos to the database and add photos to the database

Author:Www.gudianxiaoshuo.com


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Add a photo to the database

PRecordSet. createInstance (_ uuidof (Recordset); strCmd. format (_ T ("SELECT * FROM class Table % d order by student ID"), m_pParentStudentInfo-> m_nClassID); pRecordSet-> Open (_ variant_t) strCmd, m_pConnection.GetInterfacePtr (), adOpenDynamic, adLockOptimistic, adshorttext); pRecordSet-> AddNew (); pRecordSet-> PutCollect (_ T ("student ID"), (long) nXuehao ); pRecordSet-> PutCollect (_ T ("name"), (maid) nameStr); pRecordSet-> PutCollect (_ T ("Address"), (maid) addStr ); pRecordSet-> PutCollect (_ T ("Contact Info"), (LPCTSTR) lianxiStr); pRecordSet-> PutCollect (_ T ("Remarks"), (LPCTSTR) beizhuStr ); CFile f; CFileException e; if (f. open (zhaoPianStr, CFile: modeRead | CFile: typeBinary, & e) // Open a jpg file {int nSize = f. getLength (); // first obtain the jpg file Length BYTE * pBuffer = new BYTE [nSize]; // apply for a memory on the heap based on the file size if (f. read (pBuffer, nSize)> 0) // Read the jpg file to pBuffer (applying for a block of memory on the stack) {BYTE * pBuf = pBuffer; /// the main section below is to put the jpg data in pBuffer into the database VARIANT varBLOB; SAFEARRAY * psa; SAFEARRAYBOUND rgsabound [1]; if (pBuf) {rgsabound [0]. lLbound = 0; rgsabound [0]. cElements = nSize; psa = SafeArrayCreate (VT_UI1, 1, rgsabound); for (long I = 0; I <(long) nSize; I ++) SafeArrayPutElement (psa, & I, pBuf ++); varBLOB. vt = VT_ARRAY | VT_UI1; varBLOB. parray = psa; pRecordSet-> GetFields ()-> GetItem (_ T ("photo")-> AppendChunk (varBLOB);} delete [] pBuffer; pBuf = NULL ;} f. close () ;}precordset-> Update ();

Read photo

CString xuehaoStr = m_XueShengList.GetItemText (nIndex, 0); // the text in the first column of the selected row _ CommandPtr spCmd; _ RecordsetPtr pRecordSet; spCmd. createInstance (_ uuidof (Command); spCmd-> ActiveConnection = m_pConnection; CString strCmd; strCmd. format (_ T ("select * from class Table % d where student ID = % d"), m_pParentStudentInfo-> m_nClassID, _ ttoi (xuehaoStr )); spCmd-> CommandText = (LPCTSTR) strCmd; pRecordSet = spCmd-> Execute (NULL, NULL, ad1_text ); If (pRecordSet-> adoEOF) // the student whose student ID is not found return; if (m_Pic.m_IPicture! = NULL) m_Pic.FreePictureData (); long nSize = pRecordSet-> GetFields ()-> GetItem (_ T ("photo")-> ActualSize; if (nSize> 0) {_ variant_t varBLOB; varBLOB = pRecordSet-> GetFields ()-> GetItem (_ T ("photo")-> GetChunk (nSize); if (varBLOB. vt = (VT_ARRAY | VT_UI1) {if (BYTE * pBuffer = new BYTE [nSize + 1]) {char * pBuf = NULL; SafeArrayAccessData (varBLOB. parray, (void **) & pBuf); memcpy (pBuffer, pBuf, nSize); SafeArrayUnaccessData (varBLOB. parray); m_Pic.LoadPictureData (pBuffer, nSize); delete [] pBuffer; pBuf = NULL; // The PICTURE control automatically adapts to the m_Photo.GetClientRect (rc); m_Photo.ClientToScreen (rc ); screenToClient (rc); long Width = 0; long Height = 0; m_Pic.m_IPicture-> get_Width (& Width); m_Pic.m_IPicture-> get_Height (& Height ); float f = Width/(float) Height; long w = f * (rc. bottom-rc.top); m_Photo.SetWindowPos (NULL, rc. left, rc. top, w, rc. height (), SWP_NOMOVE); m_Photo.GetClientRect (rc); CClientDC (& m_Photo); m_Pic.UpdateSizeOnDC (& dc); rc. left --; rc. top --; m_Pic.Show (& dc, rc );}}}