The Image Data Provider is an extensible and decoupled module used by PageView and the ThumbnailView components for the delivery of images for viewing. The architecture is based on the ASP.NET Provider model. See Using ImageGear.Web.DataProviders Namespace.
There are two methods by which these settings can be configured:
- Utilize "Smart Tags" or "Action Lists" visible in the design view in Visual Studio 2008, 2010, and 2012. These Action Lists provide the ability to automatically configure default settings.
- Edit the configuration settings within web.config.
The following example illustrates the settings that must be specified for all image data providers (built-in and custom).
| Web.config |  Copy Code |
|---|---|
<configuration> <configSections> ..... ..... <section name="ImageGear.Web.DataProviders.ImageProvider" type="ImageGear.Web.DataProviders.ImageDataProviderConfiguration,ImageGear21.Web.Services" /> .... .... </configSections> ..... ...... < ImageGear.Web.DataProviders.ImageProvider default = "SqlImageDataProvider" parseToken = "!"> <providers> <add name="SqlImageDataProvider" type="ImageGear.Web.DataProviders.SqlImageDataProvider,ImageGear21.Web.Services" connectionStringName="SqlImageProviderConnection" sqlCommand="SELECT ImageData FROM dbo.ImageStore WHERE [Image_key] = @Image_key" sqlCommandType="Text" sqlImageDataField="ImageData" sqlParameter="@Image_key" paramKeySqlDbType="UniqueIdentifier" paramKeyLength="36" cachingEnable="false" sqlCacheDependencyNeeded="false" initSqlCacheDependency="false" maxImageSizeToCache="512" cachingTimeLimit="5" /> sqlInsertCommand="INSERT INTO dbo.ImageStore (Image_key, ImageData) VALUES (@Image_key, @ImageData)" sqlImageDataParameter="@ImageData” sqlInsertCommandType="Text" sqlArtReadCommandType="Text" sqlArtUpdateCommand="UPDATE dbo.ImageStore SET ArtDocument = @myArtData WHERE [Image_key] = @Image_key" sqlArtUpdateCommandType="Text" sqlArtDataField="ArtDocument" sqlImageDataFieldBlob="false" /> <add name="FileImageDataProvider" type="ImageGear.Web.DataProviders.FileImageDataProvider,ImageGear21.Web.Services" storageRootPath="~/viewerImages/" maxImageSizeToCache="512" cachingTimeLimit="5" cachingEnable="false" /> </providers> </ImageGear.Web.DataProviders.ImageProvider> .... </configuration> | |
The section details in the following node must remain the same, even if you write your own custom provider:
| Web.config | Copy Code |
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<section name="ImageGear.Web.DataProviders.ImageProvider" type="ImageGear.Web.DataProviders.ImageDataProviderConfiguration,ImageGear21.Web.Services" /> | |
The section details in the following node define the provider that is used:
| Web.config | Copy Code |
|---|---|
<ImageGear.Web.DataProviders.ImageProvider default = "SqlImageDataProvider" > | |
If the default value is left out, then the first in the list under provider is used as a default. If you are using your custom provider, then replace the default SqlImageDataProvider with your custom provider name.
Each of the providers has its details in the <providers> subsection of <ImageGear.Web.DataProviders.ImageProvider > details section. The custom provider has to be listed in this list with the accompanying assembly name.
