Uploading Images to a Database

Introduction

Uploading images to a Sql Server database is extremely easy using ASP.NET and C#. This article will show you how to upload Images (or any Binary Data) to a SQL Server database using ASP.NET and C#. The next part in this series, Retrieving Images from a Database, will show you how extract images from a database.

Building the Database Table

We start out by building our database table. Our image table is going to have a few columns describing the image data, plus the image itself. Here is the sql required to build our table in SQL Server or MSDE.

CREATE TABLE [dbo].[image] (
    [img_pk] [int] IDENTITY (1, 1) NOT NULL ,
    [img_name] [varchar] (50) NULL ,
    [img_data] [image] NULL ,
    [img_contenttype] [varchar] (50) NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

ALTER TABLE [dbo].[image] WITH NOCHECK ADD
CONSTRAINT [PK_image] PRIMARY KEY NONCLUSTERED
(
    [img_pk]
) ON [PRIMARY] GO

I'm a great fan of having a single column primary key, and making that key an Identity column, in our example, that column is img_pk. The next column is img_name, which is used to store a friendly name of our image, for example "Mom and Apple Pie". img_data is actually our image data column, and is where we will be storing our binary image data. img_contenttype will be used to record the content-type of the image, for example "image/gif" or "image/jpeg" so we will know what content-type we need to output back to the client, in our case the browser.

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