修复ADODB连接简单登录代码WPF的步骤如下:
以下是一个示例代码,演示了如何修复ADODB连接简单登录代码WPF:
using System;
using System.Data;
using System.Windows;
using ADODB;
namespace WpfApp
{
public partial class MainWindow : Window
{
private Connection connection;
public MainWindow()
{
InitializeComponent();
}
private void ConnectButton_Click(object sender, RoutedEventArgs e)
{
try
{
// 创建ADODB.Connection对象
connection = new Connection();
// 设置连接字符串
connection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\mydatabase.mdb;User Id=admin;Password=;";
// 打开数据库连接
connection.Open();
MessageBox.Show("连接成功!");
}
catch (Exception ex)
{
MessageBox.Show("连接失败:" + ex.Message);
}
}
private void LoginButton_Click(object sender, RoutedEventArgs e)
{
try
{
// 创建ADODB.Recordset对象
Recordset recordset = new Recordset();
// 执行SQL查询语句
recordset.Open("SELECT * FROM Users WHERE Username='" + usernameTextBox.Text + "' AND Password='" + passwordTextBox.Text + "'", connection);
if (!recordset.EOF)
{
MessageBox.Show("登录成功!");
}
else
{
MessageBox.Show("用户名或密码错误!");
}
// 关闭Recordset对象
recordset.Close();
}
catch (Exception ex)
{
MessageBox.Show("登录失败:" + ex.Message);
}
}
private void DisconnectButton_Click(object sender, RoutedEventArgs e)
{
// 关闭数据库连接
if (connection != null && connection.State == (int)ObjectStateEnum.adStateOpen)
{
connection.Close();
MessageBox.Show("连接已断开!");
}
}
}
}
请注意,上述示例代码仅供参考,实际情况可能会根据具体需求和数据库类型进行调整。
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