VS2012实现简单登录界面
时间：2021-12-10 15:59:12|栏目：.NET代码|点击： 次
本文实例为大家分享了VS2012实现登录界面的具体代码，供大家参考，具体内容如下
这个是第一个界面的代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 登录x
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void userInfoBindingNavigatorSaveItem_Click(object sender, EventArgs e)
{
this.Validate();
this.userInfoBindingSource.EndEdit();
this.tableAdapterManager.UpdateAll(this.studentRecordDataSet);
}
private void Form1_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentRecordDataSet1.UserInfo”中。您可以根据需要移动或删除它。
this.userInfoTableAdapter1.Fill(this.studentRecordDataSet1.UserInfo);
// TODO: 这行代码将数据加载到表“studentRecordDataSet.UserInfo”中。您可以根据需要移动或删除它。
this.userInfoTableAdapter.Fill(this.studentRecordDataSet.UserInfo);
}
private void passwordLabel_Click(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
string connString = @"Data Source=.;Initial Catalog=studentrecord;Integrated Security=True";
SqlConnection conn = new SqlConnection(connString);
string sql = "select count(*) from UserInfo where username='" + userNameComboBox.Text + "'and password='" + passwordTextBox.Text + "'";
conn.Open();
SqlCommand comm = new SqlCommand(sql, conn);
int num = (int)comm.ExecuteScalar();
if (num > 0)
{
Form2 frm2 = new Form2();
frm2.Show();
}
else
{
MessageBox.Show("对不起，用户名和密码并不匹配！", "登陆失败");
}
conn.Close();
}
private void userNameComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void passwordTextBox_TextChanged(object sender, EventArgs e)
{
}
}
}
这个是第二个界面的代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 登录x
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
}
}
}
运行结果如图：
