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Decode Output TBB

This week's TBB is Decode Output TBB. This super simple TBB performs a HTML decode on the Output Package item. It then overwrites the Output with the decoded value.

This decoding is useful when outputing the contents of a Text Block field, for example. By default, this field (not RTF) will be stored as encoded HTML, hence the need to decode it before outputing it in the template.

Name
Decode Output TBB
Type
·    Template in .NET Assembly
Description
Used to:
·    HTML Decode the Item “Output” from Package;
Notes:
This generic TBB expects an Item called “Output” in the Package.
It decodes its content (performing HTML Decode) and then it updates the item’s value.
Parameters
n/a
Applicable to
Any template where an Item called ‘Output’ exists in the Package

The Code

/// <summary>
/// Performs HTML decode on the Output package item value, then rewrites the Output to the package.
/// </summary>
[TcmTemplateTitle("Decode Output TBB")]
public class DecodeOutput : ITemplate {

    TemplatingLogger log = TemplatingLogger.GetLogger(typeof(DecodeOutput));

    /// <summary>
    /// Main template method.
    /// </summary>
    /// <param name="engine">Template render engine</param>
    /// <param name="package">Template package</param>
    public void Transform(Engine engine, Package package) {
        Item output = package.GetByName("Output");

        if (output == null) {
            log.Error("No output package, do nothing");
            return;
        }
        string currentOutput = HttpUtility.HtmlDecode(output.GetAsString());

        package.Remove(output);
        package.PushItem("Output", package.CreateHtmlItem(currentOutput));

        log.Debug("Finished");
    }
}

Note: HttpUtility class is part of the System.Web namespace.


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