第二次访问页面时，我的函数中的某些代码无法运行 [英] Certain code in my function doesn't run when visiting a page a second time

问题描述

我正在使用套接字构建应用程序，当我第一次访问"thepage.xaml"时，我的应用程序会完美地收到信息。但是当我回到菜单然后访问"thepage.xaml"时再次，某些代码不会运行。

我知道代码本身不是问题，否则页面第一次无法正常工作。没有变量可以改变代码的执行方式。我已经添加了MessageBoxes以确保正在运行这些函数，并且我是
在屏幕上弹出消息，但函数中的其余代码没有运行。

 private void testing（）
 {
 myboolean = true; 
 notificationTextBlock.Text ="选择你的行动..." ;; 
 MessageBox.Show（"应该刚刚排序了stuf ..."）; 
} 

这是应该运行的代码，我收到消息框正常，但其余代码不是正在执行......为什么会这样！？

请记住这段代码在我第一次运行页面时工作正常，但是当我回到我的应用菜单区域时回到页面，它没有运行前两行，只是消息框......

谢谢，

Jamie：）

解决方案

无法执行部分代码。  我倾向于认为你试图从错误的线程更新ui，因此文本块没有更新。

 private void testing（）
 {
 myboolean = true; 
 
 
 
 
 Dispatcher.BeginInvoke（（）=> {
 //此代码位于UI线程上.admuniceTextBlock.Text ="选择你的行动......"; 
}）; 
 MessageBox.Show（"应该刚刚排序了stuf ..."）; 
} 

Hi,

I am building an application using sockets and my app recieves information perfectly when i first visit "thepage.xaml" but when i go back to the menu and then visit "thepage.xaml" again certain bits of code do not run.

I know the code itself isn't the problem otherwise the page wouldn't work correctly the first time. There are no variables to this that could change the way the codes execute. I had added MessageBoxes to make sure that the functions are being run and i am getting the messages popping up on the screen but the rest of the code in the functions is not being run.

        private void testing()
        {
            myboolean = true;
            notificationTextBlock.Text = "Choose your move...";
            MessageBox.Show("should have just sorted stuf...");
        }

This is the code that should be running and i am getting the messagebox fine but the rest of the code is not being executed... why is this!?

REMEMBER this code works fine the first time i run the page but when going back to my apps menuarea and back into the page, it doesn't run the first two lines, just the messagebox...

Thanks,

Jamie :)

解决方案

There is no way that part of the code is not being executed.   What I tend to think is that you are trying to updated the ui from the wrong thread so the textblock is not updating.

        private void testing()
        {
            myboolean = true;
           
 


Dispatcher.BeginInvoke( () => {
   // This code is on the UI thread. notificationTextBlock.Text = "Choose your move...";
});
           MessageBox.Show("should have just sorted stuf...");
        }

这篇关于第二次访问页面时，我的函数中的某些代码无法运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！