程序“ng”未能运行

Question

我无法运行 Angular cli 命令。当我输入时：

ng

我得到错误：

Program 'ng' failed to run: No application is associated with the specified file for this operationAt line:1 char:1
+ ng
+ ~~.
At line:1 char:1
+ ng
+ ~~
+ CategoryInfo          : ResourceUnavailable: (:) [], ApplicationFailedException
+ FullyQualifiedErrorId : NativeCommandFailed

我尝试卸载并再次安装：

npm uninstall -g @angular/cli
removed 269 packages in 2.209s

npm cache verify
Cache verified and compressed (~\AppData\Roaming\npm-cache\_cacache):
Content verified: 4035 (209610714 bytes)
Index entries: 6536
Finished in 4.679s

npm install -g @angular/cli
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
C:\Users\U\AppData\Roaming\npm\ng -> C:\Users\U\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng

@angular/cli@10.0.1 postinstall C:\Users\U\AppData\Roaming\npm\node_modules\@angular\cli
node ./bin/postinstall/script.js

+ @angular/cli@10.0.1
added 259 packages from 201 contributors and updated 10 packages in 11.611s

卸载文件从C:\Users\U\AppData\Roaming\npm\node_modules\@angular 中删除后，安装后它们又在那里。我看到文件C:\Users\U\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng，但是当我尝试运行它时出现上面的错误消息。

我尝试安装不同的版本，但似乎没有任何效果。

我还尝试设置我在blog 中看到的 ExecutionPolicy：但它仍然无法正常工作。

Answer 1

将C:\Users\U\AppData\Roaming\npm 添加到系统变量路径对我有用。之后我重新启动了我的控制台。