Oleg Sych

This article describes a custom T4 directive processor for converting XML schema definitions into .NET classes, which allows using strongly-typed code to extract information from various XML files. In particular, this simplifies creating custom T4 code generation templates for LINQ to SQL .dbml files and ADO.NET Entity Framework .edmx files. The article includes links to ready to use xsd directive processor and sample source code.

July blogs posts about code generation with T4 text templates.

Mike Pagel recently posted an interesting article about T4 on CodeProject called “T4: Extending the Generated Template Class“. In this article, Mike describes several approaches for implementing code generation logic - helper methods defined in class feature blocks, custom directive processors and a custom TextTransformation base class referenced using the inherits attribute of the template […]

Database tables often contain columns that store codes, or values with special meaning. In application code, these special values can be encapsulated as enumerations. This article demonstrates how to use T4 code generation templates and Visual Studio CodeModel API to generate SQL views that encapsulate the special values for use in SQL code.

Recent blog posts about T4

This post shows how to create unit tests that run during T4 template transformation. This approach allows creating automated tests for template code that relies on specific capabilities of a T4 host, such as access to Visual Studio extensibility APIs. The post includes a ready to use test runner for T4 unit tests.

This article provides an in-depth look at the architecture of T4 template transformation process, discusses some constraints that limit template design, describes techniques that can be used to work around these limitations and points out some (sometimes undocumented) mechanisms for making your T4 templates more powerful.

David DeWinter posted a great article about using T4 to generate stored procedures for ADO.NET entity data models. It includes a ready to use T4 template that will generate stored procedures for every .EDMX file in a given directory.

Nested Template Class is one of T4 template design techniques that can be used to develop reusable templates. The main template is defined as a nested TextTransformation class inside of a class feature block.

Standalone Template is one of T4 template design techniques that can be used to develop reusable templates. The using template uses T4 engine to compile the main template into a separate assembly and run the compiled code independently of the using template.