How to retrieve image from database
In ADO.NET, a .NET Data Provider implements the base System.Data classes to expose objects, properties, methods, and events for database connectivity and interaction. These providers serve as intermediaries between your application and the underlying database system.
SQL Server, being a popular relational database management system, offers a set of system data types that define the various kinds of data that can be used within SQL Server.
Large object (LOB) data type
The Image data type in SQL Server is categorized as a large object (LOB) data type. It is designed to store variable-length binary data, such as images or other large files. The Image data type can hold a significant amount of binary data, ranging from 0 to 2^31-1 (2,147,483,647) bytes.
One important aspect to note about the Image data type is that direct conversion to another data type is not supported, either implicitly or explicitly. You cannot directly convert an Image data type to another data type within SQL Server.
However, it is possible to perform indirect conversion of Image data. This can be achieved by utilizing other data types or using techniques like binary serialization or encoding to transform the Image data into a different format or representation suitable for the desired use case.
The following C# source code shows how to retrieve an image from SQL Server.Full Source C#
It's important to handle the conversion of Image data with care, considering factors such as data size, performance, and storage requirements. By using appropriate techniques and understanding the limitations of the Image data type, you can effectively work with large binary data within SQL Server.