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1、c#登录界面代码c#登录界面代码 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace WindowsApplication1 public partial class Form1 : Form public Form1 InitializeCo
2、mponent; private void button1_Click(object sender, EventArgs e) string sqlstring = database=students_info;Trusted_Connection=yes; SqlConnection a = new SqlConnection(sqlstring); a.Open; SqlCommand b = new SqlCommand(select * from students2, a); SqlDataReader c = b.ExecuteReader; while (c.Read) if (this.textBox1.Text.Equals(cid.ToString) & this.textBox2.Text.Equals(cname.ToString) MessageBox.Show(正确); /else / / Response.Write(abc); / if (!this.textBox1.Text.Equals(cid.ToString) & !this.textBox2.Text.Equals(cname.ToString) MessageBox.Show(错误);
