【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《登录界面设计及代码设计》,欢迎阅读!
登录界面:
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 System.Data.SqlClient;
namespace _123 {
public partial class login : Form {
public login() {
InitializeComponent(); }
private void quxaio_Click(object sender, EventArgs e) {
MessageBox.Show("确定退出吗?"); this.Close(); }
private void denglu_Click(object sender, EventArgs e) {
if (this.zhanghao.Text.Trim() == ""|this.mima.Text.Trim()=="") {
if(this.zhanghao.Text.Trim()=="") {
MessageBox.Show("帐号不能为空!请从洙新输入!"); }
else if (this.mima.Text.Trim() == "") {
MessageBox.Show("密码不能为空!请从新输入!"); } } else {
string ConnStr = @"server=.;database=user_db;uid=sa;pwd=zhangrui;"; SqlConnection conn = new SqlConnection(ConnStr); conn.Open();
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