更新很多按钮或复选框？

Question

我需要大约 200 个按钮作为不同颜色的指示器，我有一个包含 true 和 false 的列表，想知道是否有一种方法可以更新它们而不必写下 200 个按钮的名称。像这样：

while (servoNumber != numberOfServos)
{
    if (Convert.ToBoolean(ListServo1Inputs[0 + inputToLookFor]) == true) 
    { 
        indicatorS1Di1.BackColor = Color.LawnGreen; 
    }
    else 
    { 
        indicatorS1Di1.BackColor = Color.DarkGray; 
    }
}

而且 indicatorS1Di1.BackColor 计数到循环中的下一行 S2。类似于：indicatorS[increment number here]Di1.BackColor

也许这是一个简单的解决方案：

foreach (Control control in tabPage1.Controls.OfType<Button>())
{
    MessageBox.Show(control.GetType().ToString());

    if (control.Name first letters == "indicatorDi")
    {
        control.BackColor = Color.LawnGreen;
    }
}

非常感谢Rand Random！经过一些小的修改，这是现在的样子：

Answer 1

如果您自己创建这些按钮，您可以将它们放入字典中，并将您的增量名称作为键。

然后您可以更改值：

ServoButtonDict[$"indicatorS{incrementalNumber}Di1"].BackColor = Color.LawnGreen;

Answer 2

您正在寻找一个 foreach 循环，这样您就可以动态地迭代按钮。

foreach (var indicator in ListServoInputs) {
    if (indicator.Checked) {
        indicator.BackColor = Color.LawnGreen;
    } else {
        indicator.BackColor = Color.DarkGray;
    }
}

或者您可以使用 ternary operator 进一步简化它，这对于简单但冗长的 if/else 语句非常有用。

foreach (var indicator in ListServoInputs) {
    indicator.BackColor = indicator.Checked ? Color.LawnGreen : Color.DarkGray;

Answer 3

在您的加载事件中构建一个控件列表。

_buttons = new List<Button>(); //this is a field and not a local variable in the load event
for (var i = 0; i < ListServo1Inputs.Count; i++)
{
    _buttons.Add((Button)this.Controls.Find($"indicatorS{i}Di1", true).First());
}

要更新您的颜色，请使用以下方法：

for (var i = 0; i < ListServo1Inputs.Count; i++)
{
    //you can now use the same index for _controls and ListServo1Inputs - since you constructed a list of controls based on ListServo1Inputs in the loaded event
    _buttons[i].BackColor = Convert.ToBoolean(ListServo1Inputs[i]) ? Color.LawnGreen : Color.DarkGray;
}

编辑：

根据您的评论。

我会动态创建按钮。在您的表单中，您需要一个带有点击事件的按钮和一个面板。

public partial class Form1 : Form
{
    //stores the booleans in a list
    private readonly List<bool> _values = new List<bool>();

    //I use a random to generate the booleans _random.Next(2) will produce either 0 or 1 and _random.Next(2) == 1 will give true on 1 and false on 0
    private readonly Random _random = new Random();

    public Form1()
    {
        InitializeComponent();

        //fill the list
        FillValues();

        //iterate over the list
        for (var index = 0; index < _values.Count; index++)
        {
            //create a button for each entry
            var btn = new Button();
            btn.Name = "Values" + index; //dont need the name, but you can fill it as you see fit
            btn.Width = 70; //set the width as you desire
            btn.Height = 20; //set the height as you desire
            btn.Text = btn.Name; //set a text if you like to, I used the .Name

            //some math to position the buttons, I here use a grid of 12 since you mentioned your naming scheme changes at 12 S1Di1 -> S1Di12 and than S2Di1 -> S2Di12
            btn.Top = (index / 12) * (btn.Height + btn.Margin.Top); 
            btn.Left = (index % 12) * (btn.Width + btn.Margin.Left);

            panel1.Controls.Add(btn); //add the button to a panel thats inside your form, only the buttons that get created here should be inside that panel nothing more
        }

        //update the colors of the button
        UpdateColors();
    }

    private void FillValues()
    {
        //clear the values, before filling it
        _values.Clear();

        //you mentioned 200 buttons, so here is a for loop for 200 entries and fill the values with a bool
        for (int i = 0; i < 200; i++)
            _values.Add(_random.Next(2) == 1);

        //of course you dont need to clear the list and re-add the items everytime this method gets called, you can check if (_values.Count == 0) and only than add the items and in else set the new values with _values[i] = newValue - its just the lazy way :)
    }
    private void UpdateColors()
    {
        //iterate over the list and set the panels Controls[index] to the color - the index will match with the list since you have created the buttons based on the list previously
        for (int i = 0; i < _values.Count; i++)
            panel1.Controls[i].BackColor = _values[i] ? Color.LawnGreen : Color.DarkGray;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //to have new bools in list fill the values
        FillValues();

        //update the colors
        UpdateColors(); 
    }
}

有了这个，你最终会得到：

当您按下按钮 1 时：

更新很多按钮或复选框？

Update a lot of buttons or checkboxes?

c#

dictionary

button

indicator