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Specifies an event handler signalled to identify the graphic type for a database image.
Source position: dbctrls.pp line 1161
type TOnDBImageRead = procedure( |
Sender: TObject; |
S: TStream; |
var GraphExt: string |
) of object; |
Sender |
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Object (TDBImage) instance for the event notification. |
S |
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Stream instance with the image data examined in the event handler. |
GraphExt |
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Returns the file extension used for the graphic type, or an empty string when not determined. |
TOnDBImageRead is the type used for the OnDBImageRead property in TDBImage. It provides a mechanism for identifying the graphic class needed to load image content in the specified stream. In general, it is used when image data in S contains an additional header that must be processed / handled prior to reading the raw image data.
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Event to read a custom header from image stream. |
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Loads the graphic content for the control from a field in the linked dataset. |
| Version 3.2 | Generated 2024-02-25 | Home |