Add an attribute to a project item

The methods GetItemAttribute and SetItemAttribute get and set the value of the attributes of a project item. SetItemAttribute creates the attribute if it does not already exist, adding it to the project item metadata.

Add an attribute to a project item

• The following code uses the DTE automation object and the SetItemAttribute method to add an attribute to a project item. The project item ID is obtained from the project item name "program.cs". The attribute "MyAttribute" is added to this project item and given the value "MyValue".

  EnvDTE.DTE dte = (EnvDTE.DTE)Package.GetGlobalService(typeof(EnvDTE.DTE));
  EnvDTE.Project project = dte.Solution.Projects.Item(1);
  
  string uniqueName = project.UniqueName;
  IVsSolution solution = (IVsSolution)Package.GetGlobalService(typeof(SVsSolution));
  IVsHierarchy hierarchy;
  solution.GetProjectOfUniqueName(uniqueName, out hierarchy);
  IVsBuildPropertyStorage buildPropertyStorage = hierarchy as IVsBuildPropertyStorage;
  if (buildPropertyStorage != null)
  {
      uint itemId;
      string fullPath = (string)project.ProjectItems.Item("Program.cs").Properties.Item("FullPath").Value;
      hierarchy.ParseCanonicalName(fullPath, out itemId);
      buildPropertyStorage.SetItemAttribute(itemId, "MyAttribute", "MyValue");
  }
  
  

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• Persist data in the MSBuild project file