BLOBs in Delphi DB programming
Working with BLOB (Binary Large Object) database fields with Delphi.
Storing Record Data in a BLOB Field in Delphi Database Applications
Here's how to store (and retrieve) a record (structure) value into a BLOB field in Delphi database applications.
Here's how to store (and retrieve) a record (structure) value into a BLOB field in Delphi database applications.
Pictures inside a database (Free DB Course)
Displaying images (BMP, JPEG, ...) inside an Access database with ADO and Delphi.
Displaying images (BMP, JPEG, ...) inside an Access database with ADO and Delphi.
Displaying and editing MEMO fiels in Delphi's TDBGrid
Here's how to show the contents of a MEMO (textual BLOB) field in a TDBGrid. Plus: how to enable editing of a TMemoField's contents using a separate window.
Here's how to show the contents of a MEMO (textual BLOB) field in a TDBGrid. Plus: how to enable editing of a TMemoField's contents using a separate window.
Fixing 'BLOB has been modified.', 'Index is out of date.' errors
Various suggestions to resolve these errors - for Paradox BDE users
Various suggestions to resolve these errors - for Paradox BDE users
Loading bitmaps into dBASE and Paradox BLOB fields
Three of the easier methods involve 1) copying the data from the Windows clipboard into a TDBImage component connected to the BLOB field, 2) using the LoadFromFile method of the TBLOBField component, and 3) using the Assign method to copy an object of type TBitmap into the Picture property of a TBDBImage.
Three of the easier methods involve 1) copying the data from the Windows clipboard into a TDBImage component connected to the BLOB field, 2) using the LoadFromFile method of the TBLOBField component, and 3) using the Assign method to copy an object of type TBitmap into the Picture property of a TBDBImage.
Ms Access Ole Fields
Here is some code for a Delphi unit to Access in MS Access 97 the Ole Fields (blob type)
Here is some code for a Delphi unit to Access in MS Access 97 the Ole Fields (blob type)
Extracting a Bitmap from a BLOB field
Extracting a bitmap from a dBASE or Paradox blob field -- without first saving the bitmap out to a file
Extracting a bitmap from a dBASE or Paradox blob field -- without first saving the bitmap out to a file
Save and load metafiles in BLOB without using DBImage
The example demonstrates saving metafile images to a database as they exist on the disk, preserving any Placeable metafile headers that may be present in the Metafile.
The example demonstrates saving metafile images to a database as they exist on the disk, preserving any Placeable metafile headers that may be present in the Metafile.