小编Was*_*ama的帖子

我是编程的菜鸟，但在我们开始之前，请回答我为什么更新执行不止一次，并像我是个傻瓜一样解释一下。

无论如何，所以我试图让这段代码只运行一次，因为到目前为止它执行了不止一次。

 protected override void Update(GameTime gameTime)
    {
        // Allows the game to exit
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
            this.Exit();

        // TODO: Add your update logic here

         button = Mouse.GetState();




         if (button.X < buttonPosition.X || button.Y < buttonPosition.Y || button.X > buttonPosition.X + font1.MeasureString(buttonText).X ||
             button.Y > buttonPosition.Y + font1.MeasureString(buttonText).Y)
             buttonColour = new Color(0, 0, 0);//if the mouse if not hovering over the font it stays that color
         else
             buttonColour = new Color(0, 255, 255);//changes to this color if it is …

当我运行我的角度应用程序时，我得到了一个 CORS，尽管我已经在我的 .NET Core 应用程序中启用了它，但常规的 http 请求似乎工作正常，只是 SignalR 遇到了问题。任何建议将不胜感激。提前致谢。

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://localhost:5001/api/chat/negotiate. (Reason: expected \xe2\x80\x98true\xe2\x80\x99 in CORS header \xe2\x80\x98Access-Control-Allow-Credentials\xe2\x80\x99).\n\nCross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://localhost:5001/api/chat/negotiate. (Reason: CORS request did not succeed).\n\n[2019-07-06T19:34:25.061Z] Warning: Error from HTTP request. 0: . Utils.js:206\n[2019-07-06T19:34:25.065Z] Error: Failed to complete negotiation with the server: Error Utils.js:203\n[2019-07-06T19:34:25.070Z] Error: Failed to start the connection: Error Utils.js:203\nError while establishing connection :( …