登录界面(C#)

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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;   namespace WindowsFormsApplication1 {     public partial class Form1 : Form     {         public Form1()         {             InitializeComponent();         }           private void Form1_Load(object sender, EventArgs e)         {           }           private void button1_Click(object sender, EventArgs e)         {             label6.Text = "";             label4.Hide();             label5.Hide();             textBox1.Text = textBox1.Text.Trim();             textBox2.Text = textBox2.Text.Trim();             if (textBox1.Text == "") {                 label4.Show();                 return;             }             if (textBox2.Text == "") {                 label5.Show();                 return;             }             if (textBox1.Text == "chen" && textBox2.Text == "1234")             {                 label6.Text = "登陆成功,请稍后......";                 label6.ForeColor = Color.Green;             }             else {                 label6.Text = "*账号或密码错误";                 label6.ForeColor = Color.Red;             }         }     } }