Question

我已经创建了一个文本框1和2来创建一行x，从一个x开始，然后输入然后输入xx，依此类推......

现在我需要文本框3和4来显示相同的内容，但它必须从10 x开始。这就是我所拥有的：

namespace Vierkant
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
        InitializeComponent();
        }

        private void button_Click_1(object sender, RoutedEventArgs e)
        {
            string x = "X";

            for (int i = 0; i < 10; i++)
            {
                if ( i == 0)
                {
                    x = "X";
                }
                else
                {
                    x += "X";
                }
                txt_box1.Text += (x) + "\n";
                txt_box2.Text += (x) + "\n";
            }
            for (int j = 10; j > 0; j--)
            {


                if (j == 10)
                {
                    x = x.Remove(x.Length - 1);
                }
                else
                {
                    x = x.Remove(x.Length - 1);
                }
                txt_box3.Text += (x) + "\n";    
                txt_box4.Text += (x) + "\n"; 

// txt_box4.Text displays correct but starts from 9 x's?

            }
        }
    } 
}

Answer 1

您正在删除其中一个x，然后再显示它。

if (j == 10)
{
    x = x.Remove(x.Length - 1);
}

也许更好的解决方案是：

if (j < 10)
{
    x = x.Remove(x.Length - 1);
}

Answer 2

试试这个：

private void button_Click_1(object sender, RoutedEventArgs e)
{
    int i;
    string allLines = "";
    for (i = 1; i <= 10; i++)
        allLines += new string('X', i) + (i < 10 ? "\n" : "");
    txt_box1.Text = allLines;
    txt_box2.Text = allLines;

    allLines = "";
    while (--i > 0)
        allLines += new string('X', i) + (i > 1 ? "\n" : "");
    txt_box3.Text = allLines;
    txt_box4.Text = allLines;
}

这种方式更清晰，更有效，你在内存中创建了很多的字符串。

c＃使用循环编写x

2 个答案: