C#操作数据库，分页、执行存储过程等 [二] - ADO.NET入门之中
2024-06-06 03:48:27
简单分页
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;
namespace opdata{public partial class Form1 : Form {private static String connectstring = "server=192.168.15.175;database='wentest';user id='sa';password='19831221'";private SqlConnection allconn; //连接对象 private int allpage; //计算得出的总页数 private int currpage; //当前页数 private int allrows;//所有条数 private int psize;public Form1() { InitializeComponent(); }
private void button1_Click(object sender, EventArgs e) { listView1.Items.Clear(); SqlConnection conn = new SqlConnection(connectstring);try { conn.Open(); SqlCommand cmd = new SqlCommand("select top 100 * from adonet", conn); SqlDataReader sread = cmd.ExecuteReader();while (sread.Read()) { ListViewItem lv = new ListViewItem(sread.GetString(0)); lv.SubItems.Add(sread.GetString(1)); lv.SubItems.Add(sread.GetString(2)); lv.SubItems.Add(sread.GetDateTime(3).ToString()); listView1.Items.Add(lv);
} sread.Close();
}catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
conn.Close();
}
}
private void setListview(ListView lview) { lview.View = View.Details; //表格方式 lview.GridLines = true; lview.FullRowSelect = true; ColumnHeader header1 = new ColumnHeader(); ColumnHeader header2 = new ColumnHeader(); ColumnHeader header3 = new ColumnHeader(); ColumnHeader header4 = new ColumnHeader(); header1.Text = "编号"; header2.Text = "名称"; header3.Text = "地址"; header4.Text = "日期"; header1.Width = 80; header2.Width = 100; header3.Width = 280; header4.Width = 140; header1.TextAlign = HorizontalAlignment.Center; header2.TextAlign = HorizontalAlignment.Center; header3.TextAlign = HorizontalAlignment.Center; header4.TextAlign = HorizontalAlignment.Center; lview.Columns.Add(header1); lview.Columns.Add(header2); lview.Columns.Add(header3); lview.Columns.Add(header4); lview.Items.Clear(); }
private void Form1_Load(object sender, EventArgs e) {
//初始化 allconn = new SqlConnection(connectstring); allrows = getpageall(allconn); //取得所有条数 currpage = 1;//设为第一页 psize = 50; allpage = getpage(allrows, psize); //取得页数 setListview(listView1);//MessageBox.Show(allpage.ToString()); showlist(allconn, listView1, 1);//statusStrip1. toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize .ToString()+ "条记录，共有" +allpage.ToString()+ "页，当前页：" + currpage.ToString() + "/" + allpage.ToString(); toolStripStatusLabel2.Text = "当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss"); }
private void button2_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection(connectstring);try { conn.Open(); SqlCommand cmd = new SqlCommand("select count(*) from adonet", conn); MessageBox.Show(cmd.ExecuteScalar().ToString()); }catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
conn.Close();
} }
private void button5_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection(connectstring);try { conn.Open(); SqlCommand cmd = new SqlCommand(); cmd.Connection = conn; cmd.CommandText = "myfy_one"; //存储过程名 cmd.CommandType = CommandType.StoredProcedure; SqlParameter param = cmd.CreateParameter(); param.Direction = ParameterDirection.Input; //输入参数 param.ParameterName = "@size"; param.DbType = DbType.Int32; param.Value = 100;
SqlParameter param1 = cmd.CreateParameter(); param1.Direction = ParameterDirection.Input; param1.ParameterName = "@number"; param1.DbType = DbType.Int32; param1.Value = 3;
cmd.Parameters.Add(param); cmd.Parameters.Add(param1);
SqlDataReader sread = cmd.ExecuteReader();while (sread.Read()) { ListViewItem lv = new ListViewItem(sread.GetString(0)); lv.SubItems.Add(sread.GetString(1)); lv.SubItems.Add(sread.GetString(2)); lv.SubItems.Add(sread.GetDateTime(3).ToString()); listView1.Items.Add(lv);
} sread.Close();
}catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
conn.Close();
} }
private void button6_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection(connectstring);try { conn.Open(); SqlCommand cmd = new SqlCommand("sall",conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@allnum",SqlDbType.Int,4); cmd.Parameters["@allnum"].Direction = ParameterDirection.Output; cmd.ExecuteNonQuery(); MessageBox.Show(cmd.Parameters["@allnum"].Value.ToString());
}catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
conn.Close();
} }
private void button7_Click(object sender, EventArgs e) { currpage = 1; showlist(allconn, listView1, currpage); toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize.ToString() + "条记录，共有" + allpage.ToString() + "页，当前页：" + currpage.ToString() + "/" + allpage.ToString(); }
private int getpageall(SqlConnection gconn) //取得条数 {int rnum=0;try { gconn.Open(); SqlCommand cmd = new SqlCommand("sall", gconn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@allnum", SqlDbType.Int, 4); cmd.Parameters["@allnum"].Direction = ParameterDirection.Output; cmd.ExecuteNonQuery();//MessageBox.Show(cmd.Parameters["@allnum"].Value.ToString()); rnum = (int)cmd.Parameters["@allnum"].Value;
}catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
gconn.Close();
}return rnum;
}
private int getpage(int rows,int size) //取得页数 {int page;if (rows % size == 0 ) //若是能整除 { page = rows / size; }else {
page = rows / size +1; }return page;
}
private void showlist(SqlConnection sconn,ListView lvw,int cur) //显示记录到listview1 { lvw.Items.Clear();if (allrows != 0) //有记录才显示 {try { sconn.Open(); SqlCommand cmd = new SqlCommand(); cmd.Connection = sconn; cmd.CommandText = "myfy_one"; //存储过程名 cmd.CommandType = CommandType.StoredProcedure; SqlParameter param = cmd.CreateParameter(); param.Direction = ParameterDirection.Input; //输入参数 param.ParameterName = "@size"; param.DbType = DbType.Int32; param.Value = psize; //分页大小 SqlParameter param1 = cmd.CreateParameter(); param1.Direction = ParameterDirection.Input; param1.ParameterName = "@number"; param1.DbType = DbType.Int32; param1.Value = cur; //当前页 cmd.Parameters.Add(param); cmd.Parameters.Add(param1); SqlDataReader sread = cmd.ExecuteReader();while (sread.Read()) { ListViewItem lv = new ListViewItem(sread.GetString(0)); lv.SubItems.Add(sread.GetString(1)); lv.SubItems.Add(sread.GetString(2)); lv.SubItems.Add(sread.GetDateTime(3).ToString()); lvw.Items.Add(lv);
} sread.Close();
}catch (SqlException ee) { MessageBox.Show(ee.ToString()); }finally {
sconn.Close();
} }
}
private void button8_Click(object sender, EventArgs e) { currpage = allpage; showlist(allconn,listView1, currpage); toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize.ToString() + "条记录，共有" + allpage.ToString() + "页，当前页：" + currpage.ToString() + "/" + allpage.ToString(); }
private void button3_Click(object sender, EventArgs e) {if (currpage > 1) { currpage = currpage - 1; showlist(allconn, listView1, currpage); toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize.ToString() + "条记录，共有" + allpage.ToString() + "页，当前页：" + currpage.ToString() + "/" + allpage.ToString(); } }
private void button4_Click(object sender, EventArgs e) {if (currpage < allpage) { currpage = currpage + 1; showlist(allconn, listView1, currpage); toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize.ToString() + "条记录，共有" + allpage.ToString() + "页，当前页：" + currpage.ToString() + "/" + allpage.ToString(); } }
private void timer1_Tick(object sender, EventArgs e) {
toolStripStatusLabel2.Text = "当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss"); }
private void button9_Click(object sender, EventArgs e) {int size = System.Int32.Parse( textBox1.Text );if (size < 1) { currpage = 1; }if (size > allpage) { currpage = allpage; } currpage = size; showlist(allconn, listView1, currpage); toolStripStatusLabel1.Text = "总共有" + allrows.ToString() + "条记录，每页" + psize.ToString() + "条记录，共有" + allpage.ToString() + "页，当前页：" + currpage.ToString() + "/" + allpage.ToString();
}
}}转载于:https://www.cnblogs.com/onepc/archive/2011/10/29/2228689.html
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