c# - 如何处理具有相同父级的不同事件处理程序？

Question

下面的程序实际上不是我的项目，但它让我以后在真正的程序中更容易理解我想要什么。

这里有一个 .gif 可查看当前功能:

我想要什么？我想添加一个标签总分。其中包括复选框和文本框的点，这也应该是实时计算的。对于每个组(面板)

问题出在哪里？我不知道如何管理它，因为我正在使用两个不同的事件处理程序。

这是来源:

namespace Test1
{
    public partial class Form1 : Form
    {
        int chkBoxX = 10;
        int chkBoxY = 30;
        int txtBoxX = 10;
        int txtBoxY = 50;
        int panelX = 0;
        int panelY = 0;


        public Form1()
        {
            InitializeComponent();

            for (int k = 1; k <= 3; k++)
            {

                Panel panel = new Panel();
                panel.Width = 550;
                panel.Height = 100;
                panel.Location = new Point(panelX, panelY);
                panel.BackColor = Color.RoyalBlue;


                panelY += 110;

                 this.Controls.Add(panel);
                  AddElements(panel);

            }                                          

        }

        void AddElements(Panel panel) {

            Label labelChkBoxPoints = new Label();
            labelChkBoxPoints.Name = "labelChkBoxPoints";
            labelChkBoxPoints.Location = new Point(400, 30);
            labelChkBoxPoints.AutoSize = true;
            labelChkBoxPoints.BackColor = Color.White;
            labelChkBoxPoints.Font = new Font(labelChkBoxPoints.Font.FontFamily, 12, FontStyle.Bold);

            panel.Controls.Add(labelChkBoxPoints);

            Label labelTxtBoxPoints = new Label();
            labelTxtBoxPoints.Name = "labelTxtBoxPoints";
            labelTxtBoxPoints.Location = new Point(400, 50);
            labelTxtBoxPoints.AutoSize = true;
            labelTxtBoxPoints.BackColor = Color.White;
            labelTxtBoxPoints.Font = new Font(labelChkBoxPoints.Font.FontFamily, 12, FontStyle.Bold);

            panel.Controls.Add(labelTxtBoxPoints);

            Label labeltotalPoints = new Label();
            labeltotalPoints.Location = new Point(430, 40);
            labeltotalPoints.Font = new Font(labeltotalPoints.Font.FontFamily, 14, FontStyle.Bold);
      //      labeltotalPoints.Text = "10XXXXXXXXXXXX0";
            labeltotalPoints.AutoSize = true;
            labeltotalPoints.BackColor = Color.White;
                    //   labeltotalPoints.;
            panel.Controls.Add(labeltotalPoints);

            for (int i = 1; i <= 5; i++)
            {
                CheckBox checkBox = new CheckBox();
                checkBox.Name = String.Format("checkBox{0}", i);
                checkBox.Text = "";
                checkBox.Width = 20;
                checkBox.Height = 15;
                checkBox.Location = new Point(chkBoxX, chkBoxY);
                chkBoxX += 26;

                checkBox.CheckedChanged += checkBox_CheckedChanged;

                panel.Controls.Add(checkBox);

            }

            for (int j = 1; j <= 5; j++)
            {
                TextBox tb = new TextBox();
                tb.Name = String.Format("textBox{0}", j);
                tb.Width = 60;
                tb.Location = new Point(txtBoxX, txtBoxY);
                txtBoxX += 80;
                tb.TextChanged += txtBox_CheckedChanged;
                panel.Controls.Add(tb);
            }

            chkBoxX -= (5 * 26);
            txtBoxX -= (5 * 80);

        }

        private void txtBox_CheckedChanged(object sender, EventArgs e)
        {

            int total = 0; int points = 0; 

            foreach (object tb in ((TextBox)sender).Parent.Controls)
            {

                if (tb is TextBox)
                {
                    if (!string.IsNullOrEmpty(((TextBox)tb).Text))
                    {
                        if (!int.TryParse(((TextBox)tb).Text, out points))
                        {
                            ((TextBox)tb).Text = "";
                        }

                            total += points;
                    }
                }
            }

            (((TextBox)sender).Parent.Controls["labelTxtBoxPoints"]).Text = Convert.ToString(total);



        }

        private void checkBox_CheckedChanged(object sender, EventArgs e)
        {

            int counter = 0;

            foreach (object cb in ((CheckBox)sender).Parent.Controls)
            {
                if (cb is CheckBox)
                {
                    if (((CheckBox)cb).Checked)
                    {
                        counter++;
                    }
                }

            }

            (((CheckBox)sender).Parent.Controls["labelChkBoxPoints"]).Text = Convert.ToString(counter);

        }
    }
}

Answer 1

我将使用 Microsoft 的响应式框架(NuGet“Rx-Main”和“Rx-WinForms”/“Rx-WPF”)。

它让我创建几个函数，以相当紧凑的方式完成您想要的操作。

对于复选框，您需要此功能:

Func<IEnumerable<CheckBox>, IObservable<int>> makeCheckBoxCounter = cbs =>
    cbs
        .Select(cb => Observable.FromEventPattern(h => cb.Click += h, h => cb.Click -= h))
        .Merge()
        .Select(ep => cbs.Where(cb2 => cb2.Checked == true).Count());

这让我可以将复选框列表传递给函数，它返回 IObservable<int>这给了我一个可观察的序列，即选中的复选框的总和。

你可以像这样使用它:

IDisposable checkBoxesSubscription =
    makeCheckBoxCounter(new[] { checkBox1, checkBox2, checkBox3, checkBox4, checkBox5, })
        .Subscribe(x => label1.Text = x.ToString());

我已经测试了这段代码，它工作得很好。

您可以通过调用以下命令将其关闭:

checkBoxesSubscription.Dispose();

由于需要解析文本，文本框版本稍微复杂一些。它看起来像这样:

Func<IEnumerable<TextBox>, IObservable<int>> makeTextBoxCounter = tbs =>
    tbs
        .Select(tb =>
            Observable
                .FromEventPattern(h => tb.TextChanged += h, h => tb.TextChanged -= h))
        .Merge()
        .Select(ep =>
        {
            var total = 0;
            foreach (var tb2 in tbs)
            {
                var value = 0;
                if (int.TryParse(tb2.Text, out value))
                {
                    total += value;
                }
            }
            return total;
        });

订阅是这样的:

var textBoxesSubscription =
    makeTextBoxCounter(new[] { textBox1, textBox2, textBox3, textBox4, textBox5, })
        .Subscribe(x => label2.Text = x.ToString());

我已经测试了这两个。