I am using diferent .tt files in a project but i want make the execution during TFS buil only on one of the .tt files.

I add the tags in de project file but i need to know how can i select only one .tt file. I use de msbuild command into a pre-build event, but a i prefer put the entry into the project file.

Using the msbuild command this is my .csproj file

false
false
true

If i put the TransformOnBuild = true all the .tt files are procesed, but in one of the files i receive the error (Could not obtain DTE from host) and i can´t find a solution, this is the reason to use a filter.

Regarding the error found by Maxim ( Could not obtain DTE from host) — how in MSBUILD do we get the host ?
Below is a full list of the MSBuild errors I see .
Thanks, Peter
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\TextTemplating\v10.0\Microsoft.TextTemplating.targets(396,5): error : Running transformation: System.ArgumentNullException: Value cannot be null. [C:\xx.csproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\TextTemplating\v10.0\Microsoft.TextTemplating.targets(396,5): error : Parameter name: Could not obtain DTE from host [C:\xxx.csproj]

You can’t get the DTE object when running the transformation outside the VS Host. This error occurs, for example when running the transformation within a Team Build (the MSBuild Host does not “know” the DTE object).
I think this should not happen in Olivier’s case, but I’ll have to try it first.

First of all let me thank you for your extended article on the subject and your general contribution to the T4 community.
Now, I am facing the same problem as Maxim (see comment number 14) and get the following exception when the transformation is run from within my Visual Studio when the project builds:
Error 1 Running transformation: System.ArgumentNullException: Value cannot be null.
Parameter name: Could not obtain DTE from host
at Microsoft.VisualStudio.TextTemplating41FDF5B3010E4E4C9D7658B293ACAB45.GeneratedTextTransformation.EntityFrameworkTemplateFileManager.VsEntityFrameworkTemplateFileManager..ctor(Object textTemplating) in c:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes\EF.Utility.CS.ttinclude:line 1867
at Microsoft.VisualStudio.TextTemplating41FDF5B3010E4E4C9D7658B293ACAB45.GeneratedTextTransformation.EntityFrameworkTemplateFileManager.Create(Object textTransformation) in c:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes\EF.Utility.CS.ttinclude:line 1702
at Microsoft.VisualStudio.TextTemplating41FDF5B3010E4E4C9D7658B293ACAB45.GeneratedTextTransformation.TransformText() in c:\Projects\Afda\Main\Afda\Afda.DAL\AfdaModel.Context.tt:line 288
at Microsoft.VisualStudio.TextTemplating.TransformationRunner.RunTransformation(TemplateProcessingSession session, String source, ITextTemplatingEngineHost host, String& result). Line=0, Column=0 Afda.DAL

All files have been previously checked out but it doesn’t help.

Any support would be appreciated.

Thank you in advance, kind regards,
Olivier

I am trying to use the MSBuild extentions however some of my templates use VS variables in reference assembly directive, i.e

This works fine is VS2010 but not in the msbuild host. Any suggestion how I can reference an assembly with a relative path and work in both the VS2010 host and the msbuild host.

thanks
Kendall

I might miss something very important, but I don’t know what. Could you please publish your “t4msbuild” project so I could compare with my project and fix the problem.

Maxim