标签：
杂谈 |
分类： Asp.Net练习笔记 |
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 DataSet.DataSet1TableAdapters;
using System.Diagnostics;
namespace DataSet
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
T_UsersTableAdapter adapter = new T_UsersTableAdapter();
DataSet1.T_UsersDataTable data = adapter.GetData();
for (int i = 0; i < data.Count; i++)
{
DataSet1.T_UsersRow userrow = data[i];
if (userrow.IsUserNameNull() )
{
MessageBox.Show("NULL");
}
else
{
MessageBox.Show(userrow.UserName + userrow.UserPassWord);
}
}
data[0].UserName = "luozixuan";
adapter.Update(data);
adapter.Insert("lineage", "lineage", 0);
//表结构必须设置主键才可以使用update，delete
for (int i = 0; i < data.Count; i++)
{
DataSet1.T_UsersRow userrow = data[i];
MessageBox.Show(userrow.UserName + userrow.UserPassWord);
}
}
private void Login_Click(object sender, EventArgs e)
{
T_UsersTableAdapter adapter = new T_UsersTableAdapter();
DataSet.DataSet1.T_UsersDataTable datatable = adapter.GetDataByID(this.txtusername.Text);
if (datatable.Count < 0)
{
MessageBox.Show("用户名错误");
}
else
{
DataSet.DataSet1.T_UsersRow datarow = datatable[0];
if (datarow.ErrorTimes > 3)
{
MessageBox.Show("登陆错误次数过多，账号被锁定，无法登陆！");
return;
}
if (datarow.UserPassWord == this.txtpassword.Text)
{
MessageBox.Show("登陆成功！");
adapter.ReSetErrorTimes(datarow.Id);
}
else
{
MessageBox.Show("密码错误");
adapter.AddErrorTimes(datarow.Id);
}
}
}
//强类型dataset批量更新数据时的连接处理方式
private void button2_Click(object sender, EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
T_UsersTableAdapter adapter = new T_UsersTableAdapter();
for (int i = 0; i < 1000; i++)
{
adapter.Insert(i.ToString(), i.ToString(), 0);
}
sw.Stop();
MessageBox.Show(sw.Elapsed.ToString());
}
private void button3_Click(object sender, EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
T_UsersTableAdapter adapter = new T_UsersTableAdapter();
adapter.Connection.Open();
for (int i = 0; i < 1000; i++)
{
adapter.Insert(i.ToString(), i.ToString(), 0);
}
adapter.Connection.Close();
sw.Stop();
MessageBox.Show(sw.Elapsed.ToString());
}
}
}