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：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。