vscode.workspace.workspaceFolders返回错误。Vscode扩展

Question

我正在为vscode编写一个扩展，突然遇到一个错误，我不知道如何修复它。我正在尝试创建一个脚本，在其中创建一个基于某些输入的文件，但当我尝试获取新文件的路径时，它返回一个错误！代码如下：

let command3 = vscode.commands.registerCommand('command-bot.createFile', () => {
    var fileName = vscode.window.showInputBox({
        placeHolder: "Name your file"
    });
    var fileExt = vscode.window.showInputBox({
        placeHolder: "What is the extention example: .py or .html"
    });
    const folderPath = vscode.workspace.workspaceFolders[0].uri.toString().split(":")[1];
            //The code above caused the error! Error: Object is possibly 'undefined'
});

Answer 1

workspaceFolders仅在用户打开工作区时可用，但在用户仅打开文件夹时不可用。

因此，您可能会尝试使用类似于下面的内容，

        let path: string;
        if (!workspace.workspaceFolders) {
            path = workspace.rootPath;
        } else {
            let root: WorkspaceFolder;
            if (workspace.workspaceFolders.length === 1) {
                root = workspace.workspaceFolders[0];
            } else {
                root = workspace.getWorkspaceFolder(resource);
            }

            path = root.uri.fsPath;
        }

https://github.com/vscode-restructuredtext/vscode-restructuredtext/blob/128.0.0/src/features/utils/configuration.ts#L154