从数据库获取信息和字段名,并在控制台应用程序中将它们对齐在一起
本文关键字:应用程序 控制台 在一起 对齐 信息 获取 数据库 字段 | 更新日期: 2023-09-27 17:50:49
基本上,我从我已经设法做到的数据库中获取信息。现在我需要获得要在控制台应用程序中显示的列名。我也试图对齐他们,就像他们会显示在sql server 2012。现在,我试图获得列名,但它不想工作,我卡住了。任何帮助都是感激的。下面是我的代码。
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Mail;
using System.Net;
namespace sql_connection
{
class Program
{
static void Main(string[] args)
{
string conn = null;
SqlConnection connection;
conn= ("Data Source=database''SQL2012;Initial Catalog=jobs;User ID=user;Password=passs");
connection = new SqlConnection(conn);
try{
connection.Open();
Console.WriteLine("Connection Open!");
SqlCommand cmd = new SqlCommand("SELECT [jobs].[dbo].[table hours].whd_Date,[jobs].[dbo].[table hours].whd_FromTime,[jobs].[dbo].[table hours].whd_ToTime, [jobs].[dbo].[table hours].whd_User,[jobs].[dbo].[table login].login_Email FROM [jobs].[dbo].[table hours]INNER JOIN [jobs].[dbo].[table login] ON [jobs].[dbo].[table hours].whd_User = [jobs].[dbo].[table login].login_LoginId WHERE DATEDIFF(DAY,[whd_Date],GETDATE())<=7 AND (whd_ToTime = '' OR whd_ToTime IS NULL) AND(whd_User=login_LoginId)");
cmd.Connection = connection;
SqlDataReader reader = cmd.ExecuteReader();
var columns = new List<string>();
for (int i = 0; i < reader.FieldCount; i++)
{
columns.Add(reader.GetName(i));
}
var list = new List<string>();
while(reader.Read())
{
for (int i = 0; i < reader.FieldCount; i++)
{
columns.Add(reader.GetName(i));
}
var s = string.Format("{4},{3},{2}, {1}, {0}",
reader["whd_ToTime"] == DBNull.Value? "NULL" : reader["whd_ToTime"].ToString(),
reader["whd_FromTime"] == DBNull.Value? "NULL" : reader ["whd_FromTime"].ToString(),
reader["whd_Date"].ToString(),
reader["whd_User"].ToString(),
reader["login_Email"].ToString());
Console.WriteLine(i);
Console.WriteLine(s);
list.Add(s);
}
var sb = new StringBuilder();
foreach (var s in list)
{
sb.AppendLine(s);
}
connection.Close();
MailAddress to = new MailAddress("email@gmail.com");
MailAddress from = new MailAddress("email@gmail.com");
MailMessage mail = new MailMessage(from, to);
mail.Subject = ("missed punch clock");
mail.Body = sb.ToString();
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.Credentials = new NetworkCredential(
"email@gmail.com", "passworrd");
smtp.EnableSsl = true;
Console.WriteLine("Sending email..");
smtp.Send(mail);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}
Systems.Collections.Generic.List'1[System.String]
是您在List<string>
上使用.ToString()
方法获得的结果,因此我猜测Console.WriteLine(i);
行实际上是Console.WriteLine(list);
。
如果我是正确的,那么你应该将其替换为Console.WriteLine(string.Join(", ", list.ToArray());
要正确对齐输出,可以使用制表符("'t"
)代替字符串之间的空格:
var s = string.Format("{4}'t, {3}'t, {2}'t, {1}'t, {0}";
Console.WriteLine(string.Join("'t,", list.ToArray()).TrimEnd(","));
Console.WriteLine(s);