If the folder actually is already in SVN, then you just need to specify the svn:ignore
property on that folder to ignore anything you like. In this case, you want to ignore everything, so you need to set the value to *
. This is a wildcard that will match any file.
In TortoiseSVN, right-click the folder and choose TortoiseSVN→Properties... From there, click the "New" button to add a property. You should be able to find "svn:ignore" in a drop-down list, but recent versions put it in an "advanced" menu somewhere, I don't have SVN on this computer to check right now. Once you get the property editor dialog up, just enter the single character '*' in the edit box and save the property.
If you prefer the command-line, then depending on your shell, something as simple as svn propset svn:externals "*" YourDirectoryName
will probably work. Some shells may need some extra escaping.
Either way, when you are done setting the property, you will need to commit to make the ignore list permanent (and shared with others). Now when you commit or check for modifications, you won't normally see any of the files in that folder.
If your folder is created on checkout, the folder is already added. Why does you question specify "without adding that folder"? – Ben – 2014-07-03T03:08:00.643