优化代码 value = Convert.ToString(temp[0], 2).PadLeft(8, '0');

这段代码的作用是将一个整数temp[0]转换为二进制字符串，并在左侧填充0，使其总长度为8位。如果需要优化的话，可以考虑使用位运算来实现这个功能，这样可以减少字符串的创建和拼接操作。

具体的做法是，先将temp[0]右移7位，然后取其最后一位，将其转为字符，然后再右移6位，取其最后一位，以此类推，直到右移0位。这样得到的就是一个长度为8的二进制字符串。

以下是示例代码：

string value = "";
for (int i = 7; i >= 0; i--)
{
    char bit = ((temp[0] >> i) & 1) == 1 ? '1' : '0';
    value += bit;
}

相关问题

优化代码：public static string ReadRegister(SerialPort sp, string registerAddr, int numberOfPoints, string type) { try { sp.DiscardOutBuffer(); sp.DiscardInBuffer(); string value = null; byte[] readbytes = Read(registerAddr, numberOfPoints); sp.Write(readbytes, 0, readbytes.Length); Byte[] ReceivedData = new Byte[4 + numberOfPoints * 2]; //创建接收字节数组 int i = 0; //long timespan2 = 0; //System.Diagnostics.Stopwatch watch2 = new System.Diagnostics.Stopwatch(); //watch2.Start(); //开始监视代码运行时间 while (true) { i++; if (sp.BytesToRead == 4 + numberOfPoints * 2) { sp.Read(ReceivedData, 0, sp.BytesToRead); //读取所接收到的数据 byte[] temp = new byte[numberOfPoints]; for (int j = 0; j < numberOfPoints; j++) { try { temp[j] = Convert.ToByte(Convert.ToInt16((Chr(ReceivedData[j * 2 + 1]) + Chr(ReceivedData[j * 2 + 2])), 16)); } catch { return null; } } switch (type) { case "float": value = BytesToFloat(temp).ToString("f4"); break; case "int32": value = BytesToInt32(temp).ToString(); break; case "int16": //value = Status(BytesToInt16(temp)); value = BytesToInt16(temp).ToString(); break; case "byte": value = Convert.ToString(temp[0], 2).PadLeft(8, '0'); break; case "2bytes": value = Convert.ToString(temp[0], 2).PadLeft(8, '0'); break; case "bit": value = Convert.ToString(temp[0], 2).Substring(0, 1); break; } break; } if (i > 100000) break;//10000=440ms左右 } //watch2.Stop(); //停止监视 //timespan2 = watch2.ElapsedMilliseconds; //获取当前实例测量得出的总时间 //return ReceivedData; return value; } catch { return null; } }

public static string ReadRegister(SerialPort sp, string registerAddr, int numberOfPoints, string type)
{
try
{
sp.DiscardOutBuffer();
sp.DiscardInBuffer();
string value = null;
byte[] readbytes = Read(registerAddr, numberOfPoints);
sp.Write(readbytes, 0, readbytes.Length);
Byte[] ReceivedData = new Byte[4 + numberOfPoints * 2];
int i = 0;
while (i <= 100000)
{
i++;
if (sp.BytesToRead == 4 + numberOfPoints * 2)
{
sp.Read(ReceivedData, 0, sp.BytesToRead);
byte[] temp = new byte[numberOfPoints];
for (int j = 0; j < numberOfPoints; j++)
{
if (ReceivedData.Length >= j * 2 + 2)
{
temp[j] = Convert.ToByte(Convert.ToInt16((Chr(ReceivedData[j * 2 + 1]) + Chr(ReceivedData[j * 2 + 2])), 16));
}
}
switch (type)
{
case "float":
value = BytesToFloat(temp).ToString("f4");
break;
case "int32":
value = BytesToInt32(temp).ToString();
break;
case "int16":
value = BytesToInt16(temp).ToString();
break;
case "byte":
value = Convert.ToString(temp[0], 2).PadLeft(8, '0');
break;
case "2bytes":
value = Convert.ToString(temp[0], 2).PadLeft(8, '0');
break;
case "bit":
value = Convert.ToString(temp[0], 2).Substring(0, 1);
break;
}
break;
}
Thread.Sleep(1);
}
return value;
}
catch
{
return null;
}
}

优化点：
- 添加了对 ReceivedData 数组长度的判断，避免数组越界；
- 将循环次数限制改为 100000，避免死循环；
- 在循环中添加了 Thread.Sleep(1) 来减小 CPU 占用率；
- 去掉了不必要的注释。

private void Writein_Click(object sender, EventArgs e) { string txt = ""; if (i< Obedient.GetLength(0)) { Obedient[i, 0] = Convert.ToUInt16(textBox5.Text); Obedient[i, 1] = Convert.ToUInt16(textBox6.Text); Obedient[i, 2] = Convert.ToUInt16(textBox9.Text); Obedient[i, 3] = Convert.ToUInt16(textBox10.Text); Obedient[i, 4] = Convert.ToUInt16(textBox11.Text); Obedient[i, 5] = Convert.ToUInt16(textBox12.Text); txt = (i+1) + "、" + "\t" + Convert.ToString(Obedient[i, 0]).PadLeft(4, '0') + "\t" + Convert.ToString(Obedient[i, 1]).PadLeft(4, '0') + "\t" + Convert.ToString(Obedient[i, 2]).PadLeft(4, '0') + "\t" + Convert.ToString(Obedient[i, 3]).PadLeft(4, '0') + "\t" + Convert.ToString(Obedient[i, 4]).PadLeft(4, '0') + "\t" + Convert.ToString(Obedient[i, 5]).PadLeft(4, '0') + "\r\n"; textBox7.Text += txt; this.textBox7.SelectionStart = this.textBox7.Text.Length; this.textBox7.ScrollToCaret(); i++; } 请在这段代码中再添加一个Obedient[i, 6] = Convert.ToUInt16(textBox2.Text);

可以将下面这行代码添加到 `Writein_Click` 方法中的 `if` 语句块中，即将其放在最后一个赋值语句之后：

Obedient[i, 6] = Convert.ToUInt16(textBox2.Text);

这将从 `textBox2` 中获取一个数字，并将其存储在 `Obedient` 数组的第 `i` 行的第7列中。请注意，如果数组没有7列，则需要在 `Obedient` 数组的定义处增加一列。