C# 在运行时将网格作为列表框的一项添加，最终会导致未知错误/崩溃

在下面的代码中，我正在尝试

将文本块（txtDays）放置在网格（mygrid）（作为行）中

将网格放置在列表框（lsBox）中

最后将列表框放入另一个网格（ContentPanel）

程序正在崩溃，没有出现适当的错误，当我执行此代码时，仿真器停止。如果我将网格（在2.）放在stackPanel中，或者直接放在另一个网格（在3.）中，而不将其放在ListBox中，则代码可以工作，但不能与ListBox一起工作

如有任何意见，请提供帮助

多谢各位

    private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        string[] lstDays = new string[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };

        //Creating a ListBox
        ListBox lstBox = new ListBox();
        //Grid definition
        Grid mygrid = new Grid();
        ColumnDefinition c1 = new ColumnDefinition(); //creating a column
        mygrid.ColumnDefinitions.Add(c1);

        int i = -1;
        foreach (string item in lstDays)
        {
            i += 1;
            TextBlock txtDays = new TextBlock(); //Creating a TextBlock

            RowDefinition r1 = new RowDefinition(); //Creating a row
            mygrid.RowDefinitions.Add(r1);

            txtDays.Text = item;
            txtDays.TextAlignment = TextAlignment.Left;
            if (item == "Thursday")
            {
                txtDays.TextAlignment = TextAlignment.Right;
                txtDays.Foreground = new SolidColorBrush(Colors.Green);
            }

            mygrid.Children.Add(txtDays); //Adding the TextBlock into the grid
            Grid.SetRow(txtDays,i);       //Placing the item in a particular row inside the grid          
            lstBox.Items.Add(mygrid);     //Placing grid inside a listBox (ERROR here)

        }

        RowDefinition rNewRow = new RowDefinition();
        ContentPanel.RowDefinitions.Add(rNewRow);
        ContentPanel.Children.Add(lstBox);
    }

---

您试图在每次

foreach

迭代中将

mygrid

添加到

lstBox

。带

lstBox.Items.Add（mygrid）在循环外部，因此只添加一次

如果您想要多个网格，则可以将
mygrid
的定义放入循环中。
您试图在每个
foreach
迭代中将
mygrid
添加到
lstBox
。带
lstBox.Items.Add（mygrid）在循环外部，因此只添加一次

如果需要多个网格，请将
mygrid
的定义放在循环中。
修复错误后，将代码放入循环中。对于初学者来说，这是一段很好的代码

public partial class MainPage : PhoneApplicationPage
{
    // Constructor
    public MainPage()
    {
        InitializeComponent();
    }

    private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        string[] lstDays = new string[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };

        //Creating a ListBox
        ListBox lstBox = new ListBox();

        foreach (string item in lstDays)
        {
            //Grid definition
            Grid mygrid = new Grid();
            mygrid.Width = 400;
            ColumnDefinition c1 = new ColumnDefinition(); //creating a column
            c1.Width = new GridLength(200);
            mygrid.ColumnDefinitions.Add(c1);

            RowDefinition r1 = new RowDefinition(); //Creating a row
            mygrid.RowDefinitions.Add(r1);

            TextBlock txtDays = new TextBlock(); //Creating a TextBlock
            txtDays.Text = item;
            txtDays.TextAlignment = TextAlignment.Left;
            if (item == "Thursday")
            {
                txtDays.TextAlignment = TextAlignment.Right;
                txtDays.Foreground = new SolidColorBrush(Colors.Green);
            }

            mygrid.Children.Add(txtDays); //Adding the TextBlock into the grid
            Grid.SetRow(txtDays,0);       //Placing the item in a particular row inside the grid          

            lstBox.Items.Add(mygrid);     //Placing grid inside a listBox    
        }

        RowDefinition rNewRow = new RowDefinition();
        ContentPanel.RowDefinitions.Add(rNewRow);
        ContentPanel.Children.Add(lstBox);
    }
}

修复错误后，将重新启动代码。对于初学者来说，这是一段很好的代码

public partial class MainPage : PhoneApplicationPage
{
    // Constructor
    public MainPage()
    {
        InitializeComponent();
    }

    private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        string[] lstDays = new string[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };

        //Creating a ListBox
        ListBox lstBox = new ListBox();

        foreach (string item in lstDays)
        {
            //Grid definition
            Grid mygrid = new Grid();
            mygrid.Width = 400;
            ColumnDefinition c1 = new ColumnDefinition(); //creating a column
            c1.Width = new GridLength(200);
            mygrid.ColumnDefinitions.Add(c1);

            RowDefinition r1 = new RowDefinition(); //Creating a row
            mygrid.RowDefinitions.Add(r1);

            TextBlock txtDays = new TextBlock(); //Creating a TextBlock
            txtDays.Text = item;
            txtDays.TextAlignment = TextAlignment.Left;
            if (item == "Thursday")
            {
                txtDays.TextAlignment = TextAlignment.Right;
                txtDays.Foreground = new SolidColorBrush(Colors.Green);
            }

            mygrid.Children.Add(txtDays); //Adding the TextBlock into the grid
            Grid.SetRow(txtDays,0);       //Placing the item in a particular row inside the grid          

            lstBox.Items.Add(mygrid);     //Placing grid inside a listBox    
        }

        RowDefinition rNewRow = new RowDefinition();
        ContentPanel.RowDefinitions.Add(rNewRow);
        ContentPanel.Children.Add(lstBox);
    }
}

我感到羞愧：（！是的，就是这样！：）我认为把定义放在循环中是个好主意，这是我想要实现的。没关系，我们都会犯愚蠢的错误。我把它们捆成一捆我感到羞愧：（！是的，就是这样！：）我认为把定义放在循环中是个好主意，这是我想要实现的。没关系，我们都会犯愚蠢的错误。我把它们捆成一捆