diff --git a/用户登录实现 b/用户登录实现
deleted file mode 100644
index f06cc1c..0000000
--- a/用户登录实现
+++ /dev/null
@@ -1,51 +0,0 @@
-// 用户登录代码实现：主要通过sql语句调用DataAccess类中的GetDataSetBySql()方法来实现的
-namespace L019_BookMange
-{
-    public partial class frmLogin : Form
-    {
-        public frmLogin()
-        {
-            InitializeComponent();
-        }
-        private void btnLogin_Click(object sender, EventArgs e)
-        {
-            //输入账号密码正确          
-            if (Validate())
-            {
-                string state = this.cboUserType.Text;
-               int num;
-                if (state.Equals("管理员"))//判断用户角色，若为管理员
-                    num = 2;
-                else  //若为读者
-                    num = 1;
-                //定义查询语句
-                string sql = string.Format("select * from userinfo where uname='{0}'and upwd='{1}'and ustate={2}", this.txtName.Text.Trim(), this.txtPwd.Text.Trim(), num);
-                DataSet ds = DataAccess.GetDataSetBySql(sql); //操作数据库
-                if (ds.Tables[0].Rows.Count > 0)
-                {
-                    MessageBox.Show("登录成功");
-                    FrmMain.result = DialogResult.OK;//为变量result赋值
-                    this.Close();
-                }
-                else
-                    MessageBox.Show("用户名或密码错误，请重新输入");
-            }           
-        }
-        private void frmLogin_Load(object sender, EventArgs e)
-        {
-            this.cboUserType.SelectedIndex = 0;
-        }
-        private bool Validate() //检测用户名和密码是否为空
-        {
-            if (this.txtName.Text != string.Empty && this.txtPwd.Text != string.Empty)
-                return true;
-            else
-                MessageBox.Show("用户名或密码不能为空"); //返回错误提示信息
-            return false;
-        }
-        private void btnCancle_Click(object sender, EventArgs e)
-        {
-            this.Close();
-        }
-    }
-}
\ No newline at end of file