做了一个登录窗体，根据两张用户表实现登录，分别是admin和user，当为admin时可以看到主窗体中的所有菜单项，user时只能看到部分。代码写完了之后运行没有问题，admin的登录功能也能正确实现，只是当用user身份登录时，总提示下面代码中的‘user'附近有错误（红色标出）。请高手帮我看一下，问题出在哪，谢谢大家了！不好意思，目前只有20分了。
        private void bt_login_Click(object sender, EventArgs e)
        {
            switch (comidentity .Text)
            {
                case "管理员":
                    string g_sql = string.Format("select count(*) from admin where AdminName='{0}' and AdminPwd='{1}'", txtname.Text, txtpwd.Text);
                    SqlCommand g_comm = new SqlCommand(g_sql, DBClass.conn);
                    DBClass.conn.Open();
                    int count=(int)g_comm.ExecuteScalar();
                    if (count == 1)
                    {
                        DBClass.indentity = "管理员";
                        this.Visible = false;
                        frmMain frm_main = new frmMain();
                        frm_main.Show();
                    }
                    else
                    {
                        n = n + 1;
                        if (n < 3)
                        {
                            MessageBox.Show("您的用户名或密码不正确，请重试！");
                            txtname.Text = "";
                            txtpwd.Text = "";
                            comidentity.SelectedIndex = -1;
                            txtname.Focus();
                        }
                        else
                        {
                            MessageBox.Show("错误次数已达三次，请联系管理员");
                            Application.Exit();
                        }
                    }
                    DBClass.conn.Close();
                    break;

                case "普通用户":
                    string p_sql = string.Format("select count(*) from user where username='{0}' and userpwd='{1}'", txtname.Text, txtpwd.Text);
                    SqlCommand p_comm = new SqlCommand(p_sql, DBClass.conn);
                    DBClass.conn.Open();
                    int result = (int)p_comm.ExecuteScalar();
                    if (result == 1)
                    {
                        DBClass.indentity = "普通用户";
                        this.Visible = false;
                        frmMain frm_main = new frmMain();
                        frm_main.Show();
                    }
                    else
                    {
                        n = n + 1;
                        if (n < 3)
                        {
                            MessageBox.Show("您的用户名或密码不正确，请重试！");
                            txtname.Text = "";
                            txtpwd.Text = "";
                            comidentity.SelectedIndex = -1;
                            txtname.Focus();
                        }
                        else
                        {
                            MessageBox.Show("错误次数已达三次，请联系管理员");
                            Application.Exit();
                        }
                    }
                    DBClass.conn.Close();
                    break;
            }
        }

[user]

谢谢，已经解决了。

。。。

能告诉我怎么解决的么