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  • C# 逐条查询显示数据

    逐条查询显示数据主要用到了 SqlDataAdapter.Fill 的重载方法

    SqlDataAdapter.Fill(DataSet,intStartRecord,intNumRecords,“TableName”)

    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;
    
    namespace MoveNote
    {
        public partial class Form1 : Form
        {
            static int count;
            private int currentRow = 0;
            SqlConnection connection = new SqlConnection("server=.;database=db_09;uid=sa;pwd=test");
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                using (SqlCommand command = new SqlCommand("select count(员工编号) from 员工表", connection))
                {
                    connection.Open();
                    count = (int)command.ExecuteScalar();
                }
            }
    
            private void btnFirst_Click(object sender, EventArgs e)
            {
                currentRow = 0;
                SetTextBoxInfo(currentRow);
            }
    
            private void btnPreview_Click(object sender, EventArgs e)
            {
                currentRow -= 1;
                if (currentRow < 0)
                {
                    currentRow = 0;
                    MessageBox.Show("当前已经为第一条记录!");
                    return;
                }
                SetTextBoxInfo(currentRow);
            }
    
            private void btnNext_Click(object sender, EventArgs e)
            {
                currentRow++;
                if (currentRow >= count)
                {
                    currentRow = count - 1;
                    MessageBox.Show("当前已经为最后一条记录!");
                    return;
                }
                SetTextBoxInfo(currentRow);
            }
    
            private void btnEnd_Click(object sender, EventArgs e)
            {
                currentRow = count-1;
                SetTextBoxInfo(currentRow);
            }
    
            private DataSet  DtResult(int i)
            {
                using (SqlDataAdapter adp = new SqlDataAdapter())
                {
                    adp.SelectCommand = new SqlCommand("select * from 员工表", connection);
                    DataSet ds = new DataSet();
                    adp.Fill(ds,i,1, "员工表");
                    return ds;
                }
            }
    
            private void SetTextBoxInfo(int i)
            {
                DataSet dsNew = DtResult(i);
                txtID.Text = dsNew.Tables["员工表"].Rows[0][0].ToString();
                txtName.Text = dsNew.Tables["员工表"].Rows[0][1].ToString();
                txtSalary.Text = dsNew.Tables["员工表"].Rows[0][2].ToString();
                txtPJ.Text = dsNew.Tables["员工表"].Rows[0][3].ToString();
            }
        }
    }

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  • 原文地址:https://www.cnblogs.com/wenjie0904/p/9906382.html
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