I want to pass some additional parameters to my T4 code generation templates in my TDS projects. In the TDS Projects Code Generation properties tab, there is a field for passing additional code generation properties, but I can't get this to work. I thought it would work like this:

Passing the parameters like this:

TDS Project Code Generation Properties tab

and then pick up the value in the T4 template like this:

<#@ parameter name="MyProperty" type="System.String" #>
   if (MyProperty == ...) 

But the above doesn't work. The value of MyProperty is always empty when running the T4 generation. What am I doing wrong? Have I perhaps completely misunderstood this feature?

(I'm using TDS, i.e. latest version when writing this)

  • Not sure how to fix your problem, but have you looked in to Leprechaun for CodeGen? Its so much better than T4!
    – Richard Seal
    Jan 25, 2021 at 15:22
  • Thanks, but switching to Leprechaun would be a major change in this project.
    – mikaelnet
    Jan 25, 2021 at 18:26

1 Answer 1


You try to get a property like it is passed into a session variable. But TDS passes Additional Code Generation Properties into SitecoreItem model. That is why you need to use a different approach to get values.

You are able to get your properties from SitecoreItem type, AdditionalProperties field ynside your Base Project Transform File (usually, GlassItemVX.tt):


<#@ parameter name="Model" type="HedgehogDevelopment.SitecoreProject.VSIP.CodeGeneration.Models.SitecoreItem" #>
string myProperty = Model.AdditionalProperties["MyProperty"];

Will generate this outcome:


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