ado.net封装类
1、MainWindow.xaml 面板
<Window x:Class="Test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Test"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525" WindowState="Maximized">
<Grid >
<DockPanel>
<Menu DockPanel.Dock="Top">
<MenuItem Header="文件">
<MenuItem Header="打开"></MenuItem>
</MenuItem>
<MenuItem Header="编辑">
<MenuItem Header="复制"></MenuItem>
</MenuItem>
<MenuItem x:Name="About" Header="关于我们" Click="About_Click"></MenuItem>
<MenuItem x:Name="Update" Header="更新" Click="Update_Click"></MenuItem>
<MenuItem x:Name="Chaxun" Header="查询1" Click="Chaxun_Click"></MenuItem>
<MenuItem x:Name="Chaxun2" Header="查询2" Click="Chaxun2_Click"></MenuItem>
</Menu>
<TextBox DockPanel.Dock="Left"></TextBox>
<TextBox DockPanel.Dock="Right"></TextBox>
<TextBox DockPanel.Dock="Bottom"></TextBox>
<Button Content="左" DockPanel.Dock="Left"></Button>
<Button Content="右" DockPanel.Dock="Right"></Button>
</DockPanel>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections;
using System.Data;
namespace Test
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void About_Click(object sender, RoutedEventArgs e)
{
//AboutWindow abw = new AboutWindow();
//abw.ShowDialog();
SqlHelper sh = new SqlHelper();
SqlParameter[] pars = new SqlParameter[] {
new SqlParameter("@name", "赵六"),
new SqlParameter("@id", "1")
};
string sql = "UPDATE user1 SET name=@name WHERE id=@id";
int count = sh.ExcuteSQLReturnInt(sql, pars);
MessageBox.Show("更新了 "+count+" 条数据");
}
private void Update_Click(object sender, RoutedEventArgs e)
{
//连接字符串（可以在左边服务器资源管理器里自动生成）：
//Data source=服务器名（IP地址）\实例名;
//Initial Catalog=数据库名;
//Integrated Security=True 集成身份验证
//User ID=xxx;Password=xxx 用户名密码登陆
string constr = @"Data source=LENOVO-PC;Initial Catalog=test;Integrated Security=False;User ID=sa;Password=root";
using (SqlConnection con = new SqlConnection(constr))
{
string sql = "UPDATE user1 SET name='wwwww' WHERE id=1 ";
using (SqlCommand cmd = new SqlCommand(sql, con))
{
if (con.State == System.Data.ConnectionState.Closed)
{
con.Open();
}
int r = cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("已成功修改"+r+"条语句");
}
}
}
private void Chaxun_Click(object sender, RoutedEventArgs e)
{
SqlHelper sh = new SqlHelper();
SqlParameter[] pars = new SqlParameter[] {
new SqlParameter("@pwd", "bbbbbb")
};
string sql = "SELECT * FROM user1 WHERE pwd=@pwd";
ArrayList DataList = sh.DataList(sql, pars);
foreach(ArrayList list in DataList)
{
foreach (Object obj in list)
{
MessageBox.Show(obj.ToString());
}
}
}
private void Chaxun2_Click(object sender,RoutedEventArgs e)
{
SqlHelper sh = new SqlHelper();
SqlParameter[] pars = new SqlParameter[]
{
new SqlParameter("@pwd","bbbbbb")
};
string sql = "SELECT * FROM user1 WHERE pwd=@pwd";
ArrayList list = sh.DataSet(sql,pars);
foreach(DataRow rows in list)
{
MessageBox.Show(rows["name"].ToString());
}
}
}
}
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Collections;
using System.Data;
namespace Test
{
//操作数据库方法
class SqlHelper
{
public string MyConnString
{
get
{
return @"Data source=LENOVO-PC;Initial Catalog=test;Integrated Security=False;User ID=sa;Password=root";
}
}
//执行insert,update,delete命令
//返回受影响的行数
public int ExcuteSQLReturnInt(string sql,SqlParameter[] pars)
{
SqlConnection conn = new SqlConnection(MyConnString);
try
{
SqlCommand cmd = new SqlCommand(sql, conn);
if (conn.State == System.Data.ConnectionState.Closed || conn.State == System.Data.ConnectionState.Broken)
{
conn.Open();
}
if(pars!=null && pars.Length > 0)
{
foreach (SqlParameter p in pars)
{
cmd.Parameters.Add(p);
}
}
int count = cmd.ExecuteNonQuery();
return count;
}
catch (Exception ex)
{
return 0;
}
finally
{
conn.Close();
}
}
//查询select
public ArrayList DataList(string sql,SqlParameter[] pars)
{
SqlConnection conn = new SqlConnection(MyConnString);
SqlCommand cmd = new SqlCommand(sql,conn);
if (conn.State == System.Data.ConnectionState.Closed || conn.State == System.Data.ConnectionState.Broken)
{
conn.Open();
}
if (pars != null && pars.Length > 0)
{
foreach (SqlParameter p in pars)
{
cmd.Parameters.Add(p);
}
}
SqlDataReader reader = cmd.ExecuteReader();
ArrayList list = new ArrayList();
while (reader.Read())
{
ArrayList list1 = new ArrayList();
for (int i = 0; i< reader.FieldCount; i++)
{
list1.Add(reader[i]);
}
list.Add(list1);
}
conn.Close();
return list;
}
//查询select
public ArrayList DataSet(string sql,SqlParameter[] pars)
{
SqlConnection conn = new SqlConnection(MyConnString);
SqlCommand cmd = new SqlCommand(sql,conn);
if (conn.State == System.Data.ConnectionState.Closed || conn.State == System.Data.ConnectionState.Broken)
{
conn.Open();
}
if (pars != null && pars.Length > 0)
{
foreach (SqlParameter p in pars)
{
cmd.Parameters.Add(p);
}
}
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet dataset = new DataSet();
adapter.Fill(dataset);
DataTable table = dataset.Tables[0];
DataRowCollection rows = table.Rows;
ArrayList list = new ArrayList();
for(int i = 0; i < rows.Count; i++)
{
DataRow row = rows[i];
list.Add(row);
}
return list;
}
}
}