AccusoftImagXpress13 ActiveX DLL > ImagXpress Object : LoadBlob Method |
Note: A Blob is a Binary Large Object.
A typical use of the LoadBlob method is to retrieve image data from a database.
The result of setting this method is identical to setting the FileName property except that the LoadBlob method loads image data from memory while the FileName property loads image data from a disk file.
The LoadBlob method is also the same as the LoadBuffer and LoadBufferPtr methods, except that the interfaces are different:
When an image is loaded using the LoadBlob method, the image is converted to a Device Independent Bitmap (DIB). The hDIB property is set to the handle of DIB. The DIB is converted to a Device Dependent Bitmap (DDB) and the Picture property is set to the resulting DDB. If an Undo DIB resides in memory, it is deleted and the hDIBUndo property is set to NULL.
Note: CameraRAW images can only be loaded from a filename. Loading from a stream is not supported as the entire image must be loaded before the raw format can be recognized.
Private Sub Data1_Reposition() Dim BlobSize As Long Dim ReadData As String On Error Goto Err_View ' Get the Size of the Image Data BlobSize = Data1.Recordset("ImgData").FieldSize() ' Get the image data and send it to ImagXpress If (BlobSize > 0) Then ReadData = Data1.Recordset("ImgData").GetChunk(0, BlobSize) ImagXpress1.LoadBlob ReadData, BlobSize End If ' Exit in case there was an error! Err_View: End Sub