using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Data.SqlClient;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace WindowsFormsApplication1{ public partial class Form1 : Form { private String connString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\AdventureWorksDW2008\AdventureWorksDW_Data.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"; private SqlConnection conn = null; private SqlCommand cmd = null; private SqlDataAdapter adapter = null; private SqlDataReader reader = null; private DataSet ds = new DataSet(); private int pageSize = 5; private int rowNums = 0; private int currentPage = 0; public void FillDataGridView() { try { conn = new SqlConnection(connString); if (conn.State != ConnectionState.Open) { conn.Open(); } cmd = conn.CreateCommand(); cmd.CommandText = "SELECT TOP ("+pageSize+") EmployeeKey, ParentEmployeeKey, ParentEmployeeNationalIDAlternateKey, EmployeeNationalIDAlternateKey FROM DimEmployee WHERE (EmployeeKey NOT IN (SELECT TOP ("+ pageSize*currentPage +") EmployeeKey FROM DimEmployee AS DimEmployee_1)) ORDER BY EmployeeKey"; adapter = new SqlDataAdapter(cmd); ds.Clear(); adapter.Fill(ds,"DimEmployee"); dataGridView1.DataSource = ds; dataGridView1.DataMember = "DimEmployee"; } catch (Exception) { throw; } } public void GetNum() { try { conn = new SqlConnection(connString); if (conn.State != ConnectionState.Open) { conn.Open(); } cmd = conn.CreateCommand(); cmd.CommandText = "SELECT COUNT(*) from DimEmployee"; reader = cmd.ExecuteReader(); if (reader.Read()) { rowNums = reader.GetInt32(0); } } catch (Exception) { throw; } } public Form1() { InitializeComponent(); GetNum(); } private void button1_Click(object sender, EventArgs e) { currentPage = 0; FillDataGridView(); } private void button2_Click(object sender, EventArgs e) { if (currentPage > 0) { currentPage--; } else { button2.Enabled = false; } FillDataGridView(); button3.Enabled = true; } private void button3_Click(object sender, EventArgs e) { if (currentPage < rowNums/pageSize) { currentPage++; } else { button3.Enabled = false; } FillDataGridView(); button2.Enabled = true; } private void button4_Click(object sender, EventArgs e) { currentPage = rowNums / pageSize; FillDataGridView(); } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { if (conn.State != ConnectionState.Closed) { conn.Close(); } if (reader != null) reader.Close(); } }}
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