Add button to ribbon by template

Question

I need to add a new button on the ribbon in ContentEditor for a specific template. It follows the instructions: https://community.sitecore.net/technical_blogs/b/sitecore_what39s_new/posts/adding-a-custom-button-to-the-ribbon The problem is the lack of information how I can associate such an operation with the template. This means: the new part of the menu will be shown, e.g. for the media folder, and for other templates it will not appear.

Answer 1

You can override QueryState method like that:

public override CommandState QueryState(CommandContext context)
{
  var item = context.Items[0];

  if (item.TemplateID != MyTemplateId)
    return CommandState.Hidden;

  return base.QueryState(context);
}

EDIT

After OP's question. There is no additional configuration needed. It's just one more method you need to override. So if you copied code from the link you added in your question and wrote your custom code in Execute method, you need to do the same with QueryState method:

using Sitecore.Shell.Framework.Commands;
using System;

namespace Sc.Int.MiniBizz.Customaztion
{
    class MBCustomButtonImport : Command
    {
        public override void Execute (CommandContext context)
        {
            Sitecore.Context.ClientPage.ClientResponse.Alert("Testing my button");
        }
        
        public override CommandState QueryState(CommandContext context)
        {
          var item = context.Items[0];

          if (item.TemplateID != MyTemplateId)
            return CommandState.Hidden;

          return base.QueryState(context);
        }
    }
}