Accessing Projects via DTE in C# T4 Template

Question

I'm currently trying to iterate over all of my projects (sharepoint) to get all feature guids into an file. there i want to prefix them with the projects name. My problem is DTE.Solution.Item and DTE.Solution.Projects.Item (or the enumerators for foreach) will not take an integer as parameter and foreach returns an object which is not castable to Project.

Here is my code snippet:

var hostServiceProvider = (IServiceProvider) Host;
var dte = (DTE) hostServiceProvider.GetService(typeof(DTE));
var projectCount = dte.Solution.Projects.Count;

var projects = new Dictionary<string, string>();

foreach(Project dteProject in dte.Solution)
{
    var dteProject = dte.Solution.Item(i);
    projects.Add(dteProject.Name, dteProject.FullName);
}

Okay - the code is alright - the debugger is NOT! My Exceptions where thrown in a debug context, but the Template will run fine, if the debugger is not attached.

I am seeing this exact same problem, and just encountered it this morning (good timing on the question). In my case it's throwing an InvalidCastException when iterating Project.ProjectItems. As described below, it only throws when debugging the template. — daveaglick, Oct 19 '12 at 14:00

Steven · Accepted Answer · 2012-10-18T10:56:19.197

14

Try the Solution.Projects property:

<#@ template language="C#" debug="true" hostspecific="true" #>
<#@ assembly name="Microsoft.VisualStudio.Shell.Interop.8.0" #>
<#@ assembly name="EnvDTE" #>
<#@ assembly name="EnvDTE80" #>
<#@ assembly name="VSLangProj" #>
<#@ import namespace="Microsoft.VisualStudio.Shell.Interop" #>
<#@ import namespace="EnvDTE" #>
<#@ import namespace="EnvDTE80" #>
<#@ import namespace="Microsoft.VisualStudio.TextTemplating" #>
<#@ output extension=".txt" #>
<#

var hostServiceProvider = (IServiceProvider)this.Host;
var dte = (DTE)hostServiceProvider.GetService(typeof(DTE));

foreach (Project project in dte.Solution)
{
    #>
    <#= project.Name #>
    <#
}

#>

edited Oct 18 '12 at 10:56

answered Oct 18 '12 at 10:14

Steven

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@Grumbler85: Updated my answer. The code above is a T4 template that runs succesfully on my Visual Studio 2010. – Steven Oct 18 '12 at 10:57
Okay - i see the problem now - i tried to debug my t4 since a while now - but i did not debug yours, but when i did, yours was failing too. So it seems T4-Debugging is not at it's best. – TGlatzer Oct 18 '12 at 11:08
I don't think this works if you're using solution folders, you'd have to implement some kind of recursion and probably check the Kind. – Hunter Web Apps Feb 04 '22 at 19:31
This solution will handle solution folders with a recursive pattern. https://stackoverflow.com/questions/38740773/how-to-get-project-inside-of-solution-folder-in-vsix-project – Hunter Web Apps Feb 04 '22 at 20:34

score 2 · Answer 2 · answered Oct 18 '12 at 10:17

2

Try this

        var item = dte.Solution.Projects.GetEnumerator();
        while (item.MoveNext())
        {
            var project = item.Current as EnvDTE.Project;
            if (project == null)
            {
                continue;
            }
            ...
        }

answered Oct 18 '12 at 10:17

podiluska

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@Grumbler85 Curious. I use it regularly with no ill effects. – podiluska Oct 18 '12 at 10:35
Perhaps there's a problem with VS2012? – TGlatzer Oct 18 '12 at 10:43
Okay - now it does not crash anymore, but i get the InvalidCastException at item.MoveNext() ... this is strange. – TGlatzer Oct 18 '12 at 10:47
Can i see a T4 header where you are using it? – TGlatzer Oct 18 '12 at 10:56
It's part of a hierarchy of inclusions - it might be easier to post what you have and I can see what's missing :) – podiluska Oct 18 '12 at 11:01

Accessing Projects via DTE in C# T4 Template

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