C# 如何使用导航按钮循环浏览数据？

我有一个表单，它从我的SQL数据库中加载了一些值，并且似乎正确地加载了数据

我的表单应该允许用户做的一件事是在行列表中前后导航。我在谷歌上搜索过一些方法，但我尝试过的方法都不管用

我还是SQL和C的新手，所以我有点迷路了。使用向后和向前导航按钮，让我的表单能够循环浏览数据的好方法是什么

谢谢你的阅读

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.Sql;

namespace AccountManager
{
    public partial class EditCustomer : Form
    {
        public EditCustomer()
        {
            InitializeComponent();    
        }

        private void EditCustomer_Load(object sender, EventArgs e)
        {
            try
            {
                string conString = "Data Source=.;Initial Catalog=AccountMGR;Integrated Security=True;";
                SqlConnection con = new SqlConnection(conString);

                string selectSql = "Select [Id], [AccountRef] ,[BusinessName] ,[BusinessAddress1]" +
          ",[BusinessAddress2]" +
         " ,[BusinessTown]" +
          ",[BusinessCounty]" +
          ",[BusinessPostcode]" +
          ",[BusinessCountry]" +
          ",[ContactTitle]" +
          ",[ContactFirstName]" +
          ",[ContactLastName]" +
          ",[ContactAddress1]" +
          ",[ContactAddress2]" +
          ",[ContactTown]" +
          ",[ContactCounty]" +
          ",[ContactPostCode]" +
          ",[ContactCountry]" +
          ",[ContactLandline]" +
          ",[ContactMobile]" +
          ",[ContactEmail] from Company";

                SqlCommand cmd = new SqlCommand(selectSql, con);

                try
                {
                    con.Open();

                    using (SqlDataReader read = cmd.ExecuteReader())
                    {
                        while (read.Read())
                        {
                            AccountRef.Text = (read["AccountRef"].ToString());
                            AccountName.Text = (read["BusinessName"].ToString());
                            BusinessAddress1.Text = (read["BusinessAddress1"].ToString());
                            BusinessAddress2.Text = (read["BusinessAddress2"].ToString());
                            BusinessTown.Text = (read["BusinessTown"].ToString());
                            BusinessCounty.Text = (read["BusinessCounty"].ToString());
                            BusinessPostcode.Text = (read["BusinessPostcode"].ToString());
                            BusinessCountry.Text = (read["BusinessCountry"].ToString());
                            ContactTitle.Text = (read["ContactTitle"].ToString());
                            ContactFirstName.Text = (read["ContactFirstName"].ToString());
                            ContactLastName.Text = (read["ContactLastName"].ToString());
                            ContactAddress1.Text = (read["ContactAddress1"].ToString());
                            ContactAddress2.Text = (read["ContactAddress2"].ToString());
                            ContactTown.Text = (read["ContactTown"].ToString());
                            ContactCounty.Text = (read["ContactCounty"].ToString());
                            ContactPostcode.Text = (read["ContactPostCode"].ToString());
                            ContactCountry.Text = (read["ContactCountry"].ToString());
                            ContactLandline.Text = (read["ContactLandline"].ToString());
                            ContactMobile.Text = (read["ContactMobile"].ToString());
                            ContactEmail.Text = (read["ContactEmail"].ToString());  
                        }
                    }
                }
                finally
                {
                    con.Close();
                }
            }
            finally
            {
                string conString = "Data Source=.;Initial Catalog=AccountMGR;Integrated Security=True;";
                SqlConnection con = new SqlConnection(conString);

                string selectSql = "Select Balances.id, Balances.AccountRef, Balance, PreviousBalance, LastInvoiceDate, NextInvoiceDate, InvoiceCycle from Balances inner join Company on Balances.Id = Company.Id where Company.AccountRef = @AccountRef";

                SqlCommand cmd = new SqlCommand(selectSql, con);
                cmd.Parameters.AddWithValue("@AccountRef", AccountRef.Text.Trim());

                try
                {
                    con.Open();

                    using (SqlDataReader read = cmd.ExecuteReader())
                    {
                        while (read.Read())
                        {
                            AccountRef.Text = (read["AccountRef"].ToString());
                            CustomerBalance.Text = (read["Balance"].ToString());
                            CustomerLastInvoiceDate.Text = (read["LastInvoiceDate"].ToString());
                            CustomerNextInvoiceDate.Text = (read["NextInvoiceDate"].ToString());
                            CustomerInvoiceCycle.Text = (read["InvoiceCycle"].ToString());
                        }
                    }
                }
                finally
                {
                    con.Close();
                }
            }
        }
    }
}

---

我不确定我是否完全理解，但如果您设置每个控件的“TabIndex”属性，则可以设置按钮或键事件以循环遍历每个控件/行

可能看起来像这样

    private void EditCustomer_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Down)
        {
            this.ProcessTabKey(true);
        }
        if (e.KeyCode == Keys.Up)
        {
            this.ProcessTabKey(false); // False Indicates backwards
        }
    }

---

考虑使用类似ORM的DAPPER或实体框架。按字段名索引到数据读取器中容易出错、速度慢且工作量大。然后在SQL select语句中查找OFFSET FETCH子句。@Flydog57将对此进行检查。重新表述了问题，并改进了代码的格式。沟通问题可能很棘手；一种有用的方法是将解决问题的背景与提出的问题分开。这样，其他人将更容易识别问题。对于代码，一些空白是好的，但尽量不要在其中留下太多空白。代码可能很长，为了让我们及时帮助您，删除任何不必要的内容可以帮助其他人更快地解决问题。@AndrewGray感谢您的编辑，现在人们更容易理解我要做的事情。几年前我就这样做了，但当我的电脑死机时，代码丢失了。