ImageGear for .NET
Image Data Provider Configuration
| ImageGear for .NET User Guide > Using ImageGear for .NET > Using ImageGear.Web.UI Namespace > Web.config Settings for PageView and ThumbnailView Controls > Description of Configuration Settings > Image Data Provider Configuration |
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:
The following example illustrates the settings that must be specified for all image data providers (built-in and custom).
| Web.config |
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<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 |
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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 |
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<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.