如何使位数组（true或false）改变颜色C＃ [英] How to make bit array(true or false) change back color C#

问题描述

<pre> public static BitArray ConvertHexToBitArray(string hexData)
        {
            if (hexData == null)
                return null;
            BitArray ba = new BitArray(4* hexData.Length);
           
            for (int i = 0; i < hexData.Length; i++)
            {
                byte b = byte.Parse(hexData[i].ToString(), NumberStyles.HexNumber);
                for (int j = 0; j < 4; j++)
                {
                    ba.Set(i * 4 + j, (b & (1 << (3 - j))) != 0);
                }
            }
            return ba;

<pre>private void button5_Click(object sender, EventArgs e)
        { //label1.Text = HexTobyteArray.BitArrayToString(array);
            
            var array = HexTobyteArray.ConvertHexToBitArray(textBox1.Text);
         //  string a = HexTobyteArray.BitArrayToString(array);
           
            foreach (bool b in array)
             {
                MessageBox.Show(b.ToString());
                
                Button[] btns = new Button[4];
                btns[0] = this.button1;
                btns[1] = this.button2;
                btns[2] = this.button3;
                btns[3] = this.button4;

                // label1.Text = a;                
                for (int i = 0; i < 4; i++)
                {
                    for (int j = 0; j < 4; j++)
                    {
                        if (b == true)
                        {
                            btns[i].BackColor = Color.Green;
                           
                        }
                        else
                        {
                            btns[i].BackColor = Color.Red;
                            
                        }
                    }
                }



            } 

        }

我尝试了什么：



我的问题是数组更改颜色按钮，

请求帮助我

What I have tried:

my problem is arrays to change back Color buttons,
pleass help me

推荐答案

注意：此处显示的技术不适用于前缀为'0x的十六进制字符串，或'0X：如果你想允许，测试和删除这些前缀。或者，将转换技术切换为：[ ^ ] ...如果你这样做，你将没有'TryParse的固有验证的优势。



0.在表格级别列出你的按钮...使用：

Note: the technique shown here will not work with hex string prefixed with '0x, or '0X: if you want to allow that, test for, and strip out, those prefixes. Or, switch the conversion technique to:[^] ... if you do that, you will not have the advantage of 'TryParse's inherent validation.

0. make a list of your Buttons at the Form level ... for re-use:

private List<Button> buttons;

// in the Form 'Load Event
buttons = new List<Button> { button1, button2, button3, button4 };

1。验证你有一个'合法'十六进制格式的字符串，然后使用位移来测试：

1. validate you have a string in 'legal' hex format, then use bit-shifting to test:

int hextoint;

if (Int32.TryParse(textBox1.Text, NumberStyles.HexNumber, CultureInfo.CurrentCulture, out hextoint))
{
    for (int i = 0; i < buttons.Count; i++)
    {
        buttons[i].BackColor = ((hextoint & 1) == 1)
        ? Color.Green
        : Color.Red;

        hextoint = hextoint >> 1;
    }
}
else
{
    throw new ArgumentException("bad hex input");
}

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