How to get folderpath name of currently opened file in visual studio code

I have opened multiple angular projects in visual studio code and i am trying to get cuttenlty opened file's project folder path inside my extension. But I am not getting the correct path . Anyone know please help to find the solution.

Below script only will work if I open single angular project in VS Code but how do for if I open multiple project folders.

extension.js:

exports.activate = context => {
const mymodules = vscode.commands.registerCommand('extension.search', () => {

var rooturi = vscode.workspace.workspaceFolders[0].uri;
var folderpathnameofcurrentlyopenedfile=rooturi.fsPath;  // currently opened file's project folder path[Opened single project]