c#qq登录界面

c#qq登录界面 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 qq { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button2_Click(object sender, EventArgs e) { zhuce zhu = new zhuce(); zhu.Show(); this.Visible = false; } private void button1_Click(object sender, EventArgs e) { string id = textBox1.Text; SqlConnection con = new SqlConnection(@"Data Source=LENOVO-PC\SQLEXPRESS;Initial Catalog=qq;Integrated Security=True"); con.Open(); SqlCommand b = new SqlCommand("select * from qq where id="+id, con); SqlDataReader c = b.ExecuteReader(); while (c.Read()) { if (this.textBox1.Text.Equals(c["id"].ToString())) { if (this.textBox1.Text.Equals(c["id"].ToString()) && this.textBox2.Text.Equals(c["password"].ToString())) { MessageBox.Show("正确"); break; } //else //{ // Response.Write("abc"); //} if (this.textBox1.Text.Equals(c["id"].ToString()) && !this.textBox2.Text.Equals(c["password"].ToString())) { MessageBox.Show("密码错误!"); break; } } else { MessageBox.Show("用户不存在!请重新输入"); break; } } } } } 注册界面 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.Sql; using System.Data.SqlClient; using System.Data.SqlTypes; namespace qq { public partial class zhuce : Form { public zhuce() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { string id = textBox1.Text; string password = textBox2.Text; if (textBox2.Text != textBox3.Text) { MessageBox.Show("密码不一致，请重新输入～"); } SqlConnection con = new SqlConnection(@"Data Source=LENOVO-PC\SQLEXPRESS;Initial Catalog=qq;Integrated Security=True"); try { con.Open(); string strsql = "insert into qq values ('" + id + "','" + password + "')"; SqlCommand cmd = new SqlCommand(strsql, con); cmd.ExecuteNonQuery(); label4.Text = "注册成功～"; } catch { label5.Text = "注册失败!"; } finally { con.Close(); } } private void label5_Click(object sender, EventArgs e) { Form1 cai = new Form1(); cai.Show(); this.Visible = false; } } }