Question

早上好

我需要一个foreach循环才能逐行打印以下序列：

loop1 a0，a1，a2

loop2 b0，b1，b2

loop3 c0，c1，c2

这是我的第一篇文章，对于任何缺少信息的内容，我们深表歉意。

private void button1_Click(object sender, EventArgs e)
        {
            int col0_int = 0;
            var col0_elements = new string[] { "a0", "b0", "c0", "d0", "e0", "f0", "g0", "h0", };
            IList<string> col0_all = col0_elements;
            String[] col0_list = new String[col0_all.Count];

            List<string> col0_each = new List<string>();

            foreach (string element in col0_elements)
            {
                col0_list[col0_int++] = element;
                col0_each.Add(element);
            }

            int col1_int = 0;
            var col1_elements = new string[] { "a1", "b1", "c1", "d1", "e1", "f1", "g1", "h1", };
            IList<string> col1_all = col1_elements;
            String[] col1_list = new String[col1_all.Count];

            List<string> col1_each = new List<string>();

            foreach (string element in col1_elements)
            {
                col1_list[col1_int++] = element;
                col1_each.Add(element);
            }

            int col2_int = 0;
            var col2_elements = new string[] { "a2", "b2", "c2", "d2", "e2", "f2", "g2", "h2", };
            IList<string> col2_all = col2_elements;
            String[] col2_list = new String[col2_all.Count];

            List<string> col2_each = new List<string>();

            foreach (string element in col2_elements)
            {
                col2_list[col2_int++] = element;
                col2_each.Add(element);
            }
           //LOOP script here
        }

Answer 1

假设所有数组的长度相等：

rowSums

Answer 2

如果您可以确保三个列表始终在正确的位置包含所需的元素，则快速的解决方案是两次使用LINQ Enumerable.Zip扩展方法：

var results = col0_elements.Zip(col1_elements, (x, y) => $"{x}, {y}")
                           .Zip(col2_elements, (x, y) => $"{x}, {y}");

这会产生一个IEnumerable<string>（可以循环播放），其中包含以下内容：

{
    "a0, a1, a2",
    "b0, b1, b2", 
    "c0, c1, c2", 
    "d0, d1, d2", 
    "e0, e1, e2", 
    "f0, f1, f2", 
    "g0, g1, g2",
    "h0, h1, h2"
}

Answer 3

您使事情变得过于复杂。对于每个字符串数组，您正在创建一个空字符串数组和一个仅包含一个元素的列表... 使用这种方法，您基本上可以创建一个字符串矩阵。

var col0_elements = new string[] { "a0", "b0", "c0", "d0", "e0", "f0", "g0", "h0", };
var col1_elements = new string[] { "a1", "b1", "c1", "d1", "e1", "f1", "g1", "h1", };
var col2_elements = new string[] { "a2", "b2", "c2", "d2", "e2", "f2", "g2", "h2", };

IList<string[]> all_elements = new List<string[]>{ col0_elements, col1_elements, col2_elements };

for (int i = 0; i < col0_elements.Length; i++) // Row iteration
{
    foreach (var cell in all_elements) // Cell iteration
    {
        Console.Write(cell[i]);   
    }
    Console.WriteLine();
}

Answer 4

您可以使用for循环获取它们：

for (int index = 0; index < col0_each.Count; index++)
{
    string col0String = col0_each[index];
    string col1String = col1_each[index];
    string col2String = col2_each[index];

    (print as desired);
}

此代码不包含任何错误检查，以确保每个列表足够长；假设它们的长度都相同。

代码中还有一些可以简化的额外列表，尽管这不是您要的。

在字符串数组C＃中使用“ foreach”

4 个答案: