Question

我有一个下面提到的字符串，我正在从该字符串中提取2D数组（我正在成功完成此操作），问题是我不知道如何退出while循环。

00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000,
00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000,
00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000,
00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000,
00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000,
00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,
00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,

我试图将“ x”放在字符串的末尾并像这样运行while循环，它可以工作，但是对我而言这是不可行的，因为我必须从数百个文件中读取此字符串。

while (Data_string[counter] !=  'x' )
{
    while (Data_string[counter] != ',')
    {
        if (Data_string[counter] != '\n')
            SubString += Data_string[counter];

        counter++;
    }
    // here I use Substring to covert to int and then set Substring to empty string
}

所以我正在寻找一种有效的解决方案，所以我不必更改字符串，

谢谢..

Answer 1

只需使用

while (counter < Data_string.Length)
{

}

Answer 2

这是我的处理方式：

class Program
{
    static void Main(string[] args)
    {
        string str = "00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000, 00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000, 00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000, 00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000, 00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,";

        string[] codes = str.Split(',');
    }
}

您根本不需要while循环。

如果要处理空白数据的情况，可以采用以下方法：

class Program
{
    static void Main(string[] args)
    {
        string str = "00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000, 00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000, 00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000, 00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000, 00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,";

        string[] codes = str.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries);
    }
}

class Program
{
    static void Main(string[] args)
    {
        string str = "00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000, 00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000, 00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000, 00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000, 00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,";

        string[] codes = str.Split(',').Where(x => string.IsNullOrEmpty(x) == false).ToArray();            
    }
}

class Program
{
    static void Main(string[] args)
    {
        string str = "00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000, 00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000, 00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000, 00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000, 00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,";

        List<string> codes = str.Split(',').ToList();

        codes.RemoveAll(x => string.IsNullOrEmpty(x));
    }
}

Answer 3

如果只想遍历每个二进制记录，则无需将字符串转换为2D数组并在字符串末尾添加X。

您可以通过,轻松拆分数组，并遍历数组的每个元素，例如

string input ="00000000,00000000,10100111,10100101,11111101,11111111,00000111,00000000, 00000000,00000000,11100010,00100010,11111111,11111111,00000000,10000000, 00000000,00000000,00001001,00001000,00111111,00111111,00000000,00000000, 00100000,00100000,10101110,10100010,10111110,10111110,00000000,00001000, 00000000,00111000,00100011,01111110,01111111,01000011,01000000,01111000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000, 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000";

string inputArr = input.TrimEnd(',').split(',');
foreach(string item in inputArr)
{
    Console.WriteLine(item);
}

从更新后的代码中，您似乎要删除所有,并将所有数组元素连接到单个字符串，即SubString。如果您要尝试这样做，则可以单行实现

string SubString = String.Join("",input.Split(','));

无需使用while/for loop和/或if循环，这是一种清晰易读的方法。

POC：.net fiddle

Answer 4

只需在循环中添加一个条件：

while (counter < Data_string.Length && Data_string[counter] !=  'x' )
{
       //some code
}

当然，您可以使用for循环：

for(var i = 0; i < Data_string.Length && Data_string[i] != x; i++)
{
    // some code
}

Answer 5

曾经尝试过foreach吗？只要继承了IEnumerable接口，它就会根据集合的大小动态循环。

Answer 6

使用string.Length：

while (counter < Data_string.Length)
    { } // some code

侧面说明：C＃中的通用代码样式避免了snake_case。对属性使用UpperCamelCase，对局部或私有变量使用lowerCamelCase。

Answer 7

您可以使用文件长度作为停止条件

如何在c＃中的String末尾退出while循环

7 个答案: