如何在c＃console中显示dataTable？

Question

I have create a simple program to read from the txt file to load the data to DataTable . But how can I display the DataTable info in the console? The Console.Write / Console.WriteLine does not accept the DataTable as a parameter?

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CompareLinuxWithWindow
{
    class Program
    {
        static void Main(string[] args)
        {

            ConvertToDataTable(@"C:\Users\manchunl\Desktop\Sample.txt", 10);

            Console.WriteLine();
            Console.WriteLine("Press enter to exit.");
            Console.Read();
        }

        public static DataTable ConvertToDataTable(string filePath, int numberOfColumns)
        {
            DataTable tbl = new DataTable();

            for (int col = 0; col < numberOfColumns; col++)
                tbl.Columns.Add(new DataColumn("Column" + (col + 1).ToString()));


            string[] lines = System.IO.File.ReadAllLines(filePath);

            foreach (string line in lines)
            {
                var cols = line.Split(',');

                DataRow dr = tbl.NewRow();
                for (int cIndex = 0; cIndex < 10; cIndex++)
                {
                    dr[cIndex] = cols[cIndex];
                }

                tbl.Rows.Add(dr);

            }

            return tbl;
        }
    }
}

Answer 1

You are almost there. Please try this

using System;
using System.Data;

namespace CompareLinuxWithWindow
{
    class Program
    {
    static void Main(string[] args)
    {

        DataTable dt= ConvertToDataTable(@"C:\Users\manchunl\Desktop\Sample.txt", 10);
        DataTable dt2= ConvertToDataTable(@"C:\Users\manchunl\Desktop\Sample.txt2", 10);

        //Add these lines
        for(int i=0;i<dt.Rows.Count;i++) //looping through all rows including the column. change `i=1` if need to exclude the columns display
        {
            for (int j = 0; j < dt.Columns.Count; j++) //looping through all columns
            {
                Console.WriteLine(dt.Rows[i][j]); //display of the data
            }
        }
        //End of change

        //Added for 2nd txt file
       for(int i=0;i<dt2.Rows.Count;i++) //looping through all rows including the column. change `i=1` if need to exclude the columns display
        {
            for (int j = 0; j < dt2.Columns.Count; j++) //looping through all columns
            {
                Console.WriteLine(dt2.Rows[i][j]); //display of the data
            }
        }
       //End :: Added for 2nd txt file
        Console.WriteLine("Press enter to exit.");
        Console.Read();
    }

    public static DataTable ConvertToDataTable(string filePath, int numberOfColumns)
    {
        DataTable tbl = new DataTable();

        for (int col = 0; col < numberOfColumns; col++)
            tbl.Columns.Add(new DataColumn("Column" + (col + 1).ToString()));


        string[] lines = System.IO.File.ReadAllLines(filePath);

        foreach (string line in lines)
        {
            var cols = line.Split(',');

            DataRow dr = tbl.NewRow();
            for (int cIndex = 0; cIndex < numberOfColumns; cIndex++)//changed hardcoded value of 10 to numberOfColumns
            {
                dr[cIndex] = cols[cIndex];
            }

            tbl.Rows.Add(dr);

        }

        return tbl;
    }
}
}

Kindly let me know if this helps.