WPF在子窗口中动态添加控件，回传输入值

有这样一个需求，类似从一个Excel表格筛选符合条件的行，如果列字段被标记为手动输入，则需要弹出窗口让工人输入，关键是手动输入的列字段不是确定数量的，可能是一个，也有可能是十个，也有可能一百个，不可能每种情况都创建一个对应输入窗口，只能依据参数个数，动态添加控件。

1. 在当前窗口动态添加2个文本控件

效果如下：

实现代码：

 //添加第一个文本框
    TextBox tb1 = new TextBox();
    tb1.Name = "myTextBox1";
    tb1.Text = "第一个文本框";
    tb1.Width = 150;
    tb1.Height = 50;
    tb1.HorizontalAlignment = HorizontalAlignment.Left;
    tb1.VerticalAlignment = VerticalAlignment.Top;
    tb1.Margin = new Thickness(10, 10, 0, 0);
    gdTest.Children.Add(tb1);

    //添加第二个文本框
    TextBox tb2 = new TextBox();
    tb2.Name = "myTextBox2";
    tb2.Text = "第二个文本框";
    tb2.Width = 150;
    tb2.Height = 50;
    tb2.HorizontalAlignment = HorizontalAlignment.Left;
    tb2.VerticalAlignment = VerticalAlignment.Top;
    tb2.Margin = new Thickness(10, 100, 0, 0);
    gdTest.Children.Add(tb2);

2. 访问动态添加的文本框的内容

//访问添加的全部文本框

foreach (var c in gdTest.Children)
{
if (c is TextBox)
{
TextBox tb = (TextBox)c;
if (tb.Name == “myTextBox1”)
{
MessageBox.Show(KaTeX parse error: Expected 'EOF', got '}' at position 30: …xt}"); }̲ else i…“第二个文本框：{tb.Text}”);
}
}
}

输出：

3. 获取指定文本框的内容

假如需要第2个文本框的内容，只需要在上步骤中限定文本框名称即可。

 foreach (var c in gdTest.Children)
  {
      if (c is TextBox)
       {

          TextBox tb = (TextBox)c;
          if (tb.Name == "myTextBox2")
            {
                MessageBox.Show(tb.Text);

             }

       }
 }

效果：

4. 创建一个输入窗口，动态创建参数名和参数值

关闭窗口回传输入的值：

参数输入窗口：

public partial class SubWindow : Window

    {

        public SubWindow()
        {
            InitializeComponent();
        }

        private List<string> parName = new List<string>();
        public SubWindow(int parameCount, List<string> parameName)
        {

            InitializeComponent();
            parName = parameName;
            for (int i = 0; i < parameCount; i++)
            {

                Label lbl = new Label();
                lbl.Content = parameName[i];
                lbl.FontSize = 14;
                lbl.HorizontalAlignment = HorizontalAlignment.Left;
                lbl.VerticalContentAlignment = VerticalAlignment.Top;
                lbl.Margin = new Thickness(20, 8 + i * 30, 0, 0);
                gd.Children.Add(lbl);

                TextBox tb1 = new TextBox();
                tb1.Name = parameName[i];
                tb1.Text = $"第{i}个文本框";
                tb1.Width = 300;
                tb1.Height = 25;
                tb1.KeyDown += Tb1_KeyDown;
                tb1.HorizontalAlignment = HorizontalAlignment.Left;
                tb1.VerticalAlignment = VerticalAlignment.Top;
                tb1.Margin = new Thickness(130, 10 + i * 30, 0, 0);
                gd.Children.Add(tb1);
                tb1.Focus();
            }
        }

        private void Tb1_KeyDown(object sender, KeyEventArgs e)
        {

            if (e.Key == Key.Enter)
            {

                string next = "";
                TextBox tb = sender as TextBox;
                int index = parName.IndexOf(tb.Name);
                if (index < parName.Count - 1)
                {
                    next = parName[index + 1];
                }
                else
                {
                    this.Close();
                }

                foreach (var t in gd.Children)
                {

                    if (t is TextBox)
                    {

                       TextBox textBox = (TextBox)t;
                        if (textBox.Name == next)
                        {
                            textBox.Focus();
                        }

                    }
                }

            }
        }

    }

使用方式：

List<string> names = new List<string> { "SAP", "OrderNr", "Test", "COUNT" };
            SubWindow wnd = new SubWindow(names.Count, names);
            wnd.ShowDialog();
            Dictionary<string, string> parameValueDict = new Dictionary<string, string>();

            foreach (var item in wnd.gd.Children)
            {
                if (item is TextBox)
                {
                    TextBox tb = (TextBox)item;
                    parameValueDict[tb.Name] = tb.Text;
                }
            }
            foreach (var item in parameValueDict)
            {
                txtMessage.AppendText($"{item.Key} --{item.Value}\n");

            }

5. 动态创建20个参数和演示值

private void btnDmeoAdd20_Click(object sender, RoutedEventArgs e)
        {

            List<string> Names = new List<string>();
            for (int i = 0; i < 20; i++)
            {

                Names.Add($"MyVarName{i}");
            }

            SubWindow wnd = new SubWindow(Names.Count, Names);
            wnd.ShowDialog();

            Dictionary<string, string> parameValueDict = new Dictionary<string, string>();
            foreach (var item in wnd.gd.Children)
            {

                if (item is TextBox)
                {

                    TextBox tb = (TextBox)item;
                    parameValueDict[tb.Name] = tb.Text;
                }
            }

            foreach (var item in parameValueDict)
            {
                txtMessage.AppendText($"{item.Key} --{item.Value}\n");
            }
        }

效果如下：

关闭窗口后回传输入值：