[英]Read array 2D and output as table C#
我是C#编程的新手,我试图以表格的形式显示矩阵的全部内容,但是到目前为止,我得到的是读取枚举并从矩阵中读取一行。 相反,我需要从矩阵中读取多行并将其输出为表格。
当我运行程序时,我会在行中插入两次数据,并且输出应该是表中的该数据,但是只显示了一行。 这是代码:
static int getInsertIndex(string[,] matrix)
{
for (int j = 0; j < matrix.GetLength(0); j++)
{
if (string.IsNullOrEmpty(matrix[j, 0])) return j;
}
return -1;
}
private static void InsertData<T>(string[,] matrix)
{
// int newId = generateId(ref id);
int n = getInsertIndex(matrix), id = 1;
matrix[n, 0] = Convert.ToString(id++);
int x = matrix.GetLength(1) - 1;
matrix[n, x] = "true";
for (var j = 1; j < matrix.GetLength(1); j++)
{
do
{
Console.Write($"\nInsert {GetHeader<T>(j)}: ");
matrix[0, j] = Console.ReadLine();
} while (string.IsNullOrEmpty(matrix[0, j]));
}
}
private static void ListData<T>(string[,] matrix)
{
var array = new string[matrix.GetUpperBound(1)];
for (var l = 0; l < matrix.GetLength(0); l++)
{
for (var i = 0; i < array.Length; i++)
{
array[i] = matrix[0, i];
}
}
PrintRow(array);
PrintLine();
}
private static string GetHeader<T>(int i) => Enum.GetName(typeof(T), i);
private static void ShowHeader<T>(string[,] matrix)
{
var array = new string[matrix.GetUpperBound(1)];
for (var i = 0; i < array.Length; i++)
{
array[i] = GetHeader<T>(i);
}
PrintLine();
PrintRow(array);
PrintLine();
}
private static void PrintLine()
{
Console.WriteLine(new string('-', Console.WindowWidth - 1));
}
private static void PrintRow(IReadOnlyCollection<string> columns)
{
var width = (Console.WindowWidth - 1 - columns.Count) / columns.Count;
var row = columns.Aggregate("|", (current, column) => current + AlignCentre(column, width) + "|");
Console.WriteLine(row);
}
static string AlignCentre(string text, int width)
{
text = text.Length > width ? text.Substring(0, width - 3) + "..." : text;
return string.IsNullOrEmpty(text)
? new string(' ', width)
: text.PadRight(width - (width - text.Length) / 2).PadLeft(width);
}
enum ClientHeader { Id, Name, Surname, Addres, CodPostal, Telephone, Email, State };
private static void Main()
{
var client = new string[4, 7];
InsertData<ClientHeader>(client);
Console.Clear();
InsertData<ClientHeader>(client);
ShowHeader<ClientHeader>(client);
ListData<ClientHeader>(client);
}
}
}
有两个问题:
1)在InsertData()
函数中,您要更新第n
行。
更换
matrix[0, j] = Console.ReadLine();
通过
matrix[n, j] = Console.ReadLine();
2)在ListData()
函数中要显示每一行,因此需要将数组变量移到第一个for
循环中。 用array[i] = matrix[l, i]
替换array[i] = matrix[0, i]
,因为您正在显示第l
行。
private static void ListData<T>(string[,] matrix)
{
for (var l = 0; l < matrix.GetLength(0); l++)
{
var array = new string[matrix.GetUpperBound(1)];
for (var i = 0; i < array.Length; i++)
{
array[i] = matrix[l, i];
}
PrintRow(array);
}
PrintLine();
}
尝试以下操作:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
namespace ConsoleApplication1
{
public class Program
{
private static void Main()
{
List<List<string>> data = new List<List<string>>() {
new List<string>() { "Name", "Age", "Weight"},
new List<string>() { "John", "33", "180"},
new List<string>() { "Mary", "32", "125"},
new List<string>() { "Harry", "40", "200"}
};
DataTable dt = new DataTable();
for (int i = 0; i < data.Count; i++)
{
if (i == 0)
{
foreach (string col in data[i])
{
dt.Columns.Add(col);
}
}
else
{
dt.Rows.Add(data[i].ToArray());
}
}
}
}
}
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